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21 Write a script to check whether a given number is palindrome or not. ****************************************************************** clear echo "ENTER NUMBER :=" read number rem=0 i=10 revnumber=0 for((;number>0;)) do         let revnumber=" revnumber * 10 "         let rem=" number % 10 "         let number=" number / 10 "         let revnumber=" revnumber + rem " done echo -e "\nREVERSE NUMBER :-\c" & echo $revnumber ~ ~ ~ ~ ~ ENTER NUMBER :=\c 435621  REVERSE NUMBER :-126534 [divya@linux ~]$  ****************************************************************** 

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22.Write a script to display all words of a file in ascending order. ****************************************************************** echo " Enter File Name" read fname sort $fname    or   echo  -e "\n enter File name " read fn  for i in `cat $fn`            do                 echo $i >> f2.txt            done            sort f2.txt            rm f2.txt  ~ ~ [divya@linux ~]$ cat > f1 z x y w n h t r u a b c  [11]+  Stopped                 cat > f1 [divya@linux ~]$ sh 22.sh enter File name f1 a b c h n r t u w x y z 

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23. Write a script to display all lines of a file in ascending order.  echo " Enter File Name" read fname sort $fname  /* output  [mca0914@ctilinux-1 mca0914]$ sh 23.sh  Enter File Name second.txt 1 10 2 4 40 5 8  */ 

#!/usr/bin/env bash # GTU24: Write a script to display the last modified file. # Code written By: Rushyang Darji # Visit My Online Repository: "http://github.com/rushyang/GTU-OS-Bash-Scripts" for regular updates and more scripts. # Final Build: 19.10.2010  while true;  do   # -e enables readline, which means you can use tab-completion. & -p prints whatever's written in "" before taking the path   # The ''|| exit'' makes the script exit if read returns false, which it   # will if the user hits Ctrl+C amongst other.     read -e -p "Enter Directory: " path || exit   # if path contains an existing directory, break out of this infinite loop.     [[ -d $path ]] && break     echo "Invalid Path, Try Again!" done  cd $path    # cd $path is inevitable because of * in use of ls. ls * -dpltr | grep -v '/$' | tail -n1   # Here, observe '*' after ls. You must specify a wildcard pattern for indicating all files first.    # This is because the -d option specifies that only directory names should listed.    # Moreover, -p puts an indicator at the end of "directories", which will be stripped by grep inverse.    # Once we have neglected directories, we can list(-l) "ONLY FILES" from current working directory sorted by it's modified time (-t) in reverse order (-r). The most last one will be fetched by tail.   cd $OLDPWD   # OLDPWD is the env var, which always remembers our "PREVIOUS WORKING DIRECTORY". Enter `env | grep OLDPWD` to see it.    # 'cd -' will also lead us into last working directory. But then also we don't need to print it on Terminal while executing it.  

#!/usr/bin/env bash # Code written By: Rushyang Darji # Visit My Online Repository: "http://github.com/rushyang/GTU-OS-Bash-Scripts" for regular updates and more scripts. # Final Build: 02.10.2010  while true; do      read -e -p "Enter Directory: " path || exit     [[ -d $path ]] && break     echo "Invalid path! Try Again!" done path=${path%/} myargs=`grep -l -e "printf" -e "fprintf" $path/*.c | xargs`  if [ $? -gt 1 ]; then        # grep exits with status 1 when no matches were found.      echo -n "No Matches were found. "  && exit fi temp=$(mktemp tmp.XXXXXXXXX) for i in $myargs        # Here, grep has the exit status 0.  do     echo "Do you want to add '#include ' to $i?"     read S     case $S in     Y|y|YES|Yes|yes|yeah)          sed '1i\ #include' "$i" > "$temp"        # i for insertion, 1 for 1st line. $i is the file to insert. and all output will be redirected to $temp       mv "$temp" "$i"            # renaming $temp by over writing to $i      ;;      n|N|NO|no|No|nope)         echo "Alright! Next.."         shift     ;;      *)             echo "Invalid input."     ;;     esac  done  if [ -z $myargs ]; then     echo "No Matches were found. Try another Directory" else     clear     head -n5 $path/*.c | less  fi  rm $temp  ########################   OR   ########################  #!/usr/bin/env bash # GTU25: Write a shell script to add the statement #include  at the beginning of every C source file in current directory containing printf and fprintf. # Code written By: Rushyang Darji # Visit My Online Repository: "http://github.com/rushyang/GTU-OS-Bash-Scripts" for regular updates and more scripts. # Final Build: 19.08.2010 # If you want to rename and include all ".C" files too, Refer GTU26.sh myargs=`grep -l -e "printf" -e "fprintf" *.c | xargs`  if [ $? -gt 1 ]; then        # grep has exit status 1 when no matches were found.      echo -n "No Appropriate Matches were found. " fi  for i in $myargs        # Here, grep has the exit status 0.  do     echo "Do you want to add '#include ' to $i?"     read S     case $S in     Y|y|YES|Yes|yes|yeah)          sed '1i\ #include' "$i" > $$        # i for insertion, 1 for 1st line. $i is the file to insert. and all output will be redirected to $$ (or you can say temp... Actually $$ returns terminal id. but when output is directed to it, a file is made)     mv $$ $i            # renaming $$ by over writing to $i      ;;      n|N|NO|no|No|nope)         echo "Alright!"         shift     ;;      *)     ;;     esac  done  if [ -z $myargs ]; then     echo "No Matches were found. Try another Directory" else     clear     head -n5 *.c | less  fi  

# !/usr/bin/env bash       Rushyang Darji (SVIT -Vasad ) # 26. Interactive - non-interactive shell script to prompt and delete c files within the given or predefined current directory. # # Code Developed By: Rushyang Darji # Init. Build: 06.08.2010 # Last Build: 19.10.2010  N=$# ext=c if test "$N" -eq "0"; then     while true; do    # Same inifinite loop as we used in GTU24         read -e -p "Enter Path: " path || exit         [[ -d $path ]] && break         echo "Invalid Path, Try Again!"     done      path=${path%/} # Removes last / from the end of the path. Though, it's not compulsion to do so because /foo/bar and /foo//////bar is considered exactly the same!      for i in $path/*.C     do         if [ "$i" != $path/'*.C' ]; then # If there is no match, Value of i will be ''$path/*.C''. & That's why there is no need to rename.             mv "$i" "${i/.C/}".c    # Renames every .C files to .c, so that we can use it afterwards in same loop.             clear          fi     done          for i in $path/*."$ext"     do         if [ "$i" != "$path"/'*.c' ]; then # If there is no ".C FILE" exist in that directory, it will switch to else.         clear         echo "File is $i"         head -n10 "$i" | nl    # head for displaying First 10 lines, nl for numbering them on terminal.         sleep 1            # Halt for 1 second         rm -i "$i"        # -i for interactive prompt.         # Remember, "" around $i is super necessary! Because except it, you'll get an error with filenames containing spaces.         else             echo "There are no matching \"C\" files to Prompt in this directory."             sleep 2             clear=no         fi     done      if test "$clear" != "no"; then  # If clear=no then there are no C Files to display.         clear         echo "Remaining C files in the Directory..."         ls -1 $path/*.c            # 1 result per line (-1)     fi else    # Else part contains, where user passes the name of C files, which should exist in the current working directory as the parameter.     for i in $path/*.C     do         if [ "$i" != $path/'*.C' ]; then   # if There are no matches ie if there is no C file in given dir, 'i' will be ''$path/*.C''         mv "$i" "${i/.C/}".c    # Renames every .C files to .c         clear          fi     done          for i in $*            # When filenames are passed as parameters.     do             clear         i="${i/.c/}"        # Removes an extension from file variable 'i' Only in the case of extension is also passed within the filename parameter.          i="$(pwd)/$i.c"        # Makes i the complete path of a file, including extension..     # Last two lines are necessary because user, may and may not enter filename including extension.         if [ -f "$i" ]; then    # Checks for the existence of given filename, into pwd             echo "File name is $i"             head -n10 "$i" | nl                 sleep 1             rm -i "$i"         else            # Error for non-Existent files.             echo "There is no such a file with name: \"$i\" in current working directoy"             sleep 3         fi     done     clear     echo "Remaining C files in the Directory..."     ls -1 *.c     sleep 1 fi 

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11 Write a script to display the directory in the descending order of the size of each file. ************************************************************************************************************************************ echo -n "Enter directory name : " read dname  ls $dname > file  echo "No of files in directory : $(grep [^*$] file-c)" rm -f file  ls | sort -r find . -size +1000c -print   or echo Enter Directory read direc cd $direc  ls -Sl  ~ "111.sh" 5L, 51C written [divya@linux ~]$ sh 111.sh Enter Directory d1 total 28 drwxrwxr-x 3 divya divya 4096 2010-08-10 17:10 jk -rw-rw-r-- 1 divya divya   27 2010-09-18 16:36 second -rw-rw-r-- 1 divya divya   18 2010-10-04 11:50 first -rw-rw-r-- 1 divya divya    0 2010-09-27 16:17 file  ****************************************************************** 

11. Write a script to display the directory in the descending order of the size of each     file.  echo Enter Directory read direc cd $direc  ls -Sl 

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13.  Write a script for generating a mark sheet after reading data from a file.  File contains student roll no, name , marks of three subjects.  ****************************************************************** count=1         total=0         per=0         rem1=0         wc -l s > temp         echo "************************************************************"         >>s.out         echo "            Students Result Are As Follows....."         >> s.out         echo "************************************************************"         >> s.out         echo "Rno NAME     SUB1   SUB2   SUB3 TOTAL PERCENTAGE GRADE  RESULT"          >> s.out         echo "************************************************************"         >> s.out         while [ $count -le `awk '{print $1}' temp` ]            do                 let total=0                 head -$count s > temp1                 tail -1 temp1 > temp2                 rollno=`awk '{print $1}' temp2`                 name=`awk '{print $2}' temp2`                 sub1=`awk '{print $3}' temp2`                 sub2=`awk '{print $4}' temp2`                 sub3=`awk '{print $5}' temp2`                 let total=$total+`awk '{print $3}' temp2`                 let total=$total+`awk '{print $4}' temp2`                 let total=$total+`awk '{print $5}' temp2`                 echo "STUDENT NAME IS :" `awk '{print $2}' temp2`                 echo "TOTAL IS :" $total                 let per=`expr $total / 3`                 let rem1=`expr $total % 3`                 if test $rem1 -ne 0                      then                         let per=$per+1                 fi                  echo "PERCENTAGE IS :" $per                    if [  $per -ge 70 ]                            then                               grade="A+"                    elif test $per -ge 60                         then                                   grade="A"                    elif test $per -ge 50                         then                                   grade="B"                   elif  test $per -ge 45                         then                                   grade="C"                     fi                   echo "GRADE IS :" $grade            let count=$count+1          #WRITING DATA INTO THE OUTPUT FILE           echo $rollno  $name "   " $sub1 "   " $sub2 "   " $sub3 "   " $total "     " $per "   " $grade   >> s.out     echo "-----------------------------------------------------"   >> s.out        done   rm temp   rm temp1   rm temp2  output [divya@linux ~]$ cat s 1 divya 40 30 70 2 Raj   60 40 90 [divya@linux ~]$ sh 131.sh ************************************************************             Students Result Are As Follows..... ************************************************************ Rno NAME     SUB1   SUB2   SUB3 TOTAL PERCENTAGE GRADE  RESULT ************************************************************ STUDENT NAME IS : divya TOTAL IS : 140 PERCENTAGE IS : 47 GRADE IS : C 1 divya     40     30     70     140      47     C ----------------------------------------------------- STUDENT NAME IS : Raj TOTAL IS : 190 PERCENTAGE IS : 64 GRADE IS : A 2 Raj     60     40     90     190      64     A -----------------------------------------------------                                                                   ****************************************************************** 

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#!/usr/bin/env bash # Code written By: Rushyang Darji # Last Updated: 13.08.2010 # Visit My Online Repository: "http://github.com/rushyang/GTU-OS-Bash-Scripts" for regular updates and more scripts. : << --  14. Write a script to make following file and directory management operations menu based:     Display current directory     List directory     Make directory     Change directory     Copy a file     Rename a file     Delete a file     Edit a file --  while true; do   sleep 1 echo -e "\n" echo -e "    1. Display current directory     2. List directory     3. Make directory     4. Change directory     5. Copy a file     6. Rename a file     7. Delete a file     8. Edit a file     9. Exit     Enter your choice: \c" read selection clear  case $selection in   1) pwd ;;  2) ls -l ;;  3) echo -n "Enter name of directory you wanna make: " read DIR mkdir "$DIR" if [ "$?" == "0" ]; then     echo "Directory $DIR made successfully!"     sleep 1     ls -l fi ;;  4) echo -n "Enter the Absolute Path to change the directory: " read -e apath cd $apath     if [ $? -eq 0 ]; then          echo "Working path changed successfully!"         sleep 1         pwd     fi ;;  5) echo -n "Enter name of file: " read filename echo -n "Copy where? " read -e apath cp $filename $apath  if [ $? -eq 0 ]; then     sleep 1     echo "File $filename copied successfully to $apath" fi ;;  6) echo -n "Enter old name of the file: " read oname echo -n "Enter new name: " read nname mv $oname $nname ;;  7) echo -n "Enter filename to delete: " read fdel if [ -f $fdel ]; then     rm -i $fdel fi ;;  8) echo -n "Enter filename to open it in Text Editor: " read filename vi $filename ;;  9)  clear echo "============ HAVE A NICE DAY ============" sleep 2  clear exit ;;  *) echo "Invalid choice, Please try again!: " ;;  esac done  

14 Write a script to make following file and directory management operations menu based:  ****************************************************************** Display current directory List directory Make directory Change directory Copy a file Rename a file Delete a file Edit a file ****************************************************************** clear choice=y while [ "$choice" = "y" ] do  echo "          MAIN MENU       " echo "***************************" echo "1 - DISPLAY CURRENT DIRECTORY" echo "2 - LIST DIRECTORY" echo "3 - MAKE DIRECTORY" echo "4 - CHANGE DIRECTORY" echo "5 - COPY A FILE" echo "6 - RENAME A FILE" echo "7 - DELETE A FILE" echo "8 - EDIT A FILE" echo "9 - EXIT"  echo "ENTER THE CHOICE :- " read choice case $choice in  1) echo "DISPLAYING CURRENT DIRECTORY"    pwd     ;;  2) echo "\nLIST THE CURRENT DIRECTORY"    ls -l    read     ;;  3) echo "\nMAKE A NEW DIRECTORY"    echo "\nENTER THE DIRECTORY NAME :-\c"    read dirname    mkdir "$dirname"    read dirname      ;;  4) echo "\nCHANGE THE CURRENT DIRECTORY"    echo "\nENTER THE DIRECTORY TO WHICH YOU WANT TO    read dirname   pwd    cd ..     ;;  5) echo "\nCOPY THE GIVEN FILE TO THE GIVEN DESTINAT    echo "\nENTER THE FILE TO COPY :- \c"    read file    echo "\nENTER THE DESTINATION TO COPY :- \c"    read destin    cp "$file" "$destin"     ;;  6) echo "\nRENAMING THE GIVEN FILE"    echo "\nENTER THE FILE TO RENAME :- \c"    read file1    echo "\nENTER THE NEW NAME :- \c"    read file2    mv "$file1" "$file2"      ;;  7) echo "\nDELETING THE GIVEN FILE"    echo "\nENTER THE FILE TO DELETE :- \c"    read file    rm "$file"     ;;  8) echo "\nEDITING A GIVEN FILE"    echo "\nENTER FILE TO EDIT :- \c"    read file    vi "$file"    :q      ;;  9) exit     ;;  *) echo "Invalid Choice ....."  ;;  esac  echo -e "Do u want to continue.....? [y/n]"  read choice  case $choice in   Y|y) choice=y;;   N|n) choice=n;;   *) choice=y;;  esac done   output           MAIN MENU *************************** 1 - DISPLAY CURRENT DIRECTORY 2 - LIST DIRECTORY 3 - MAKE DIRECTORY 4 - CHANGE DIRECTORY 5 - COPY A FILE 6 - RENAME A FILE 7 - DELETE A FILE 8 - EDIT A FILE 9 - EXIT ENTER THE CHOICE :- 1 DISPLAYING CURRENT DIRECTORY /home/Raj [Divya@linux ~]$ ENTER THE CHOICE :- 2 \nLIST THE CURRENT DIRECTORY total 96 -rw-rw-r-- 1 Raj Raj 1590 2010-07-26 16:27 14.sh -rw-rw-r-- 1 Raj Raj   21 2010-07-26 16:33 d drwxrwxr-x 2 Raj Raj 4096 2010-07-26 16:28 divya drwxrwxr-x 4 Raj Raj 4096 2010-07-26 16:22 family -rw-rw-r-- 1 Raj Raj  232 2010-07-23 16:39 fib.sh -rw-rw-r-- 1 Raj Raj  171 2010-07-26 16:52 log.sh -rw-rw-r-- 1 Raj Raj    9 2010-07-26 16:15 palin -rw-rw-r-- 1 Raj Raj  288 2010-07-26 16:48 pal.sh -rw-rw-r-- 1 Raj Raj  167 2010-07-26 14:19 pm.sh drwxrwxr-x 3 Raj Raj 4096 2010-07-24 16:38 r -rw-rw-r-- 1 Raj Raj  304 2010-07-26 16:55 time.sh -rw-rw-r-- 1 Raj Raj  264 2010-07-24 16:29 zero.sh ENTER THE CHOICE :- 3 \nMAKE A NEW DIRECTORY \nENTER THE DIRECTORY NAME :-\c divya1  [Divya@linux ~]$ ls 14.sh  divya   family  log.sh  pal.sh  r        zero.sh d      divya1  fib.sh  palin   pm.sh   time.sh ENTER THE CHOICE :- 5 \nCOPY THE GIVEN FILE TO THE GIVEN DESTINATION \nENTER THE FILE TO COPY :- \c d \nENTER THE DESTINATION TO COPY :- \c t  [Divya@linux ~]$ cat t target +destinatyion  ENTER THE CHOICE :- 6 \nRENAMING THE GIVEN FILE \nENTER THE FILE TO RENAME :- \c d \nENTER THE NEW NAME :- \c dest [Divya@linux ~]$ ls 14.sh  divya   family  log.sh  pal.sh  r  time.sh dest   divya1  fib.sh  palin   pm.sh   t  zero.sh ENTER THE CHOICE :- 7 \nDELETING THE GIVEN FILE \nENTER THE FILE TO DELETE :- \c t [Divya@linux ~]$ ls 14.sh  divya   family  log.sh  pal.sh  r        zero.sh dest   divya1  fib.sh  palin   pm.sh   time.sh  ENTER THE CHOICE :- 8 \nEDITING A GIVEN FILE \nENTER FILE TO EDIT :- \c dest  target +destinatyion rr Insert mode and save  [Divya@linux ~]$ cat dest target +destinatyion rr ****************************************************************** 

*************************************************************************************************  pro14. Write a shell script to make the following file and management operations menu based:  a)  Display the current directory.  b)  List directory.  c)  Make directory.  d)  Change directory.  e)  Copy of a file.  f)   Rename a file.  g)  Delete a file.  h)  Edit a file.   ************************************************************************************************* choice=y while [ "$choice" = "y" ] do  echo -e "                       MENU                    "  echo -e "1. Display the current directory"  echo -e "2. List directory"  echo -e "3. Make directory"  echo -e "4. Change directory"  echo -e "5. Copy of a file"  echo -e "6. Rename a file"  echo -e "7. Delete a file"  echo -e "8. Edit a file"  echo -e "9. Exit"  echo "\n Enter your Choice :- "  read choice  case "$choice" in   1) pwd;;   2) ls;;   3) echo -e "enter the name of new directory to be created"           read dir1           mkdir $dir1;;   4) cd;;   5) echo -e "enter the source and destination files"           read f1           read f2           cp $f1 $f2;;   6) echo -e "enter the old and new names of files"           read f1            read f2           mv $f1 $f2;;   7) echo -e "which file to be removed"           read fname           rm $fname;;   8) echo -e "which file should be edited"           read fname           vi $fname;;   9) exit;;  esac  echo -e "Do u want to continue.....? [y/n]"  read choice  case $choice in   Y|y) choice=y;;   N|n) choice=n;;   *) choice=y;;  esac done 

/* 14. Write a script to make following file and directory management operations menu based: Display current directory List directory Make directory Change directory Copy a file Rename a file Delete a file Edit a file */ echo " 1...Display current Directory" echo " 2...List Directory" echo " 3...Make directory " echo " 4...Change directory " echo " 5...Copy a file " echo " 6...Rename a fIle " echo " 7...Delete a file " echo " 8...Edit a file "  echo " Enter Your Choice: " read ch  case $ch in         1)                 pwd                 ;;         2)                 ls                 ;;         3)                 echo Enter directory name to make                 read dir_name                 mkdir $dir_name                 ;;         4)                 cd                 ;;         5)                 echo Enter two file name to copy                 read f_name1 f_name2                 cp $f_name1 $f_name2                 ;;         6)                 echo Enter file name to rename                 read fname                 mv $fname                 ;;         7)                 echo Enter file name to delete                 read fname                 rm $fname                 ;;         8)                 echo Enter file name to edit                 read fname                 vi $fname                 ;;         *)                 echo You hv entered wrong choice                 ;; esac 

15.Write a script which reads a text file and output the following Count of character, words and lines. File in reverse. Frequency of particular word in the file. Lower case letter in place of upper case letter. ******************************************************************  echo -e "\n Enter Filename : " read filen echo "--------------------------------------------------------------" echo "                             MENU  " echo "--------------------------------------------------------------" echo " a) Count the no. of char.s, words, lines." echo " b) Display a file in reverse." echo " c) Count the no. of occurrences of a particular word." echo " d) Convert Lower case to UppeCase" echo "--------------------------------------------------------------" echo -e "\n Enter Your Choice : " read c case "$c" in         a) echo -e "\n Total lines,words,char.s " ; wc $filen ;;         b) rev $filen            read buf;;         c) echo -e "\nEnter word to find :"            read w            for i in `cat $filen`            do                 echo $i >> f1.txt            done            echo -e "Total no. of words= \c" ;grep -c $w f1.txt            grep $w f1.txt            rm f1.txt;;         *) echo "Invalid choice"  esac  ~ ~ "15.sh" 28L, 894C written [divya@linux ~]$ sh 15.sh   Enter Filename : s  --------------------------------------------------------------                              MENU --------------------------------------------------------------  a) Count the no. of char.s, words, lines.  b) Display a file in reverse.  c) Count the no. of occurrences of a particular word. d) Convert Lower case to UppeCase --------------------------------------------------------------   Enter Your Choice : a   Total lines,words,char.s   7  22 193 s [divya@linux ~]$ sh 15.sh   Enter Filename : b --------------------------------------------------------------                              MENU --------------------------------------------------------------  a) Count the no. of char.s, words, lines.  b) Display a file in reverse.  c) Count the no. of occurrences of a particular word. d) Convert Lower case to UppeCase --------------------------------------------------------------   Enter Your Choice : b rev: b: No such file or directory  [5]+  Stopped                 sh 15.sh [divya@linux ~]$ sh 15.sh   Enter Filename : s --------------------------------------------------------------                              MENU --------------------------------------------------------------  a) Count the no. of char.s, words, lines.  b) Display a file in reverse.  c) Count the no. of occurrences of a particular word.  d) Convert Lower case to UppeCase" --------------------------------------------------------------  Enter Your Choice : b  akram        eman       on llor 05    ilahsiav              1 04       jariv              2 05       lanos              3 03       layap              4 04       lahen              5 06 layap 6 [6]+  Stopped                 sh 15.sh [divya@linux ~]$ sh 15.sh   Enter Filename : s --------------------------------------------------------------                              MENU --------------------------------------------------------------  a) Count the no. of char.s, words, lines.  b) Display a file in reverse.  c) Count the no. of occurrences of a particular word. d) Convert Lower case to UppeCase --------------------------------------------------------------   Enter Your Choice : c  Enter word to find : payal Total no. of words= 2 payal payal [divya@linux ~]$ sh 15.sh   Enter Filename : s --------------------------------------------------------------                              MENU --------------------------------------------------------------  a) Count the no. of char.s, words, lines.  b) Display a file in reverse.  c) Count the no. of occurrences of a particular word.  d) Convert Lower case to UppeCase --------------------------------------------------------------   Enter Your Choice : d ROLL NO       NAME        MARKs 1              VAISHALI           50 2              VIRAJ                  40 3              SONAL               50 4              PAYAL                 30 5              NEHAL                40 6              PAYAL                    60  [divya@linux ~]$  *************************************************************** 

************************************************************************************************ pro15. Write a script which reads a text file and output the following:  I)   Count of characters, words, lines.  II)  File in reverse."  III) Frequency of particular word in the file.   IV)  Lower case letters in place of uppercase alphabets. ************************************************************************************************ echo -e "\n Enter Filename : \c" read filen echo "--------------------------------------------------------------" echo "                             MENU  " echo "--------------------------------------------------------------" echo " a) Count of characters, words, lines." echo " b) File in reverse." echo " c) Frequency of particular word in the file.word." echo " d) Lower case letters in place of uppercase alphabets." echo "--------------------------------------------------------------" echo -e "\n Enter Your Choice : \c" read c case "$c" in  a) echo -e "\n Total lines,words,char.s \c" ; wc $filen ;;  b) rev $filen     read buf;;  c) echo -e "\nEnter word to find : \c"     read w     for i in `cat $filen`            do                 echo $i >> f1.txt            done            echo -e "Total no. of words= \c" ;grep -c $w f1.txt            grep $w f1.txt            rm f1.txt ;;  d) echo "Enter the text (Enter ctrl+D for end>:"     cat > temp.txt     echo "See temp.txt file for output..."     tr [a-z] [A-Z] <>

15. Write a script which reads a text file and output the following     Count of character, words and lines.     File in reverse.     Frequency of particular word in the file.     Lower case letter in place of upper case letter.  echo "Enter File Name" read fname echo "       1...Count character,words and lines       2...Reverse File       3...Found frequency of word       4...Convert upper to lower       5...Convert lower to upper       ------------------------------------" echo "Enter Choice: " read ch case $ch in 1)         echo Total Character:         wc -c $fname         echo Total Words:         wc -w $fname         echo Total Lines:         wc -l $fname         ;; 2)         rev $fname         ;; 3)         echo Enter word to find        read w         echo Frequency:         grep  -c "$w" $fname         ;; 4)         echo Enter Text         read text         echo $text | tr "[A-Z]" "[a-z]"         ;; 5)         echo Enter Text         read text         echo $text | tr "[a-z]" "[A-Z]"         ;; *)         echo Wrong Choice         ;; esac   /* output [mca0914@ctilinux-1 mca0914]$ sh 15.sh Enter File Name abc.txt        1...Count character,words and lines       2...Reverse File       3...Found frequency of word       4...Convert upper to lower       5...Convert lower to upper       6...-------------------------------- Enter Choice: 1 Total Character:      15 abc.txt Total Words:       4 abc.txt Total Lines:       2 abc.txt ****************************************************** Enter Choice: 2 olleH ?u r woH ****************************************************** Enter Choice: 3 Frequency: 2 ****************************************************** Enter Choice: 4 Enter Text HET het ****************************************************** Enter Choice: 5 Enter Text het HET ******************************************************  

#!/usr/bin/env bash # Code written By: Rushyang Darji # My Online Repository: http://github.com/rushyang/GTU-OS-Bash-Scriptss : << -- This shell script will verify whether the user is logged in or not. --  echo -e "Enter username to verify whether he is logged in or not: \c" read myname  who | awk '{print $1}' > allusers_dummy.log sed -n /^$myname$/p allusers_dummy.log > finalusers_dummy.log SIZE=`ls -s finalusers_dummy.log | awk '{ print $1 }'`  if [ $SIZE -eq 0 ]; then     echo "User is not logged in" else     echo "User: $myname is currently logged in"     sleep 2     who | sed -n /^$myname/p  fi  rm allusers_dummy.log rm finalusers_dummy.log  # OR  #!/usr/bin/env bash # Code written By: Rushyang Darji # My Online Repository: http://github.com/rushyang/GTU-OS-Bash-Scripts  echo -e "Enter name of user: \c" read myname   finaluser=`who | awk '{print $1}' | sed -n /^$myname$/p | head -n1` if [ "$myname" = "$finaluser" ]; then     echo "User is currently logged in."     sleep 1     who | sed -n /^$myname/p  else     echo "User is not currently logged in. " fi    

16.Write a shell script to check whether the named user is currently logged in or not ****************************************************************************************  clear echo -e "Enter The User name : " read name   (who | grep $name  ) && clear  echo "The User " $name && echo " Is Currently Logged In " || echo "is logged out"  ~ ~ ~ ~ ~ ~ ~ ~ Output Enter The User name : Raj  The User  Raj  Is Currently Logged In [Divya@linux ~]$  ************************************************************* 

kuldeep-SSIT  ************************************************************************************************  10. To Find That Given User is Currently Logged In Or Not.  ************************************************************************************************  clear echo "Enter The User name :\c " read name  >>temp echo "The User \c " $name  (who | grep $name >> temp ) && echo " Is Currently Logged In " || echo "is not logged in"            ************************************************************************************************ OR ****  #message Broadcast for a Single User,Multiple Users and to All#   who > e.txt  echo "For Broadcasting Messages."  if [ $# = 0 ] then     echo "Enter the User Name:\c"         read nam         p=`grep $nam e.txt`              if [ "$p" != "" ]     then             write $nam             rm e.txt             exit         else                echo "The user is not logged in"         fi              rm e.txt         exit                                    fi  if [ "$1" = "all" ] then     wall fi   for nam in $* do     p=`grep $nam e.txt`             if [ "$p" != "" ]        then                write $nam        else                echo "The User $nam is not logged in"        fi done                        ************************************************************************************************  #OR ****  echo "enter user name"  read n  who | grep "^$n"  if [ $? -eq 0 ] then     echo "currently log in" else     echo "not log in" fi  ************************************************************************************************  

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/*18. Write A Script To Perform Following String Operations Using Menu: COMPARE TWO STRINGS. JOIN TWO STRINGS. FIND THE LENGTH OF A GIVEN STRING. OCCURRENCE OF CHARACTER AND WORDS E. REVERSE THE STRING. */  while true do echo --------------------------------------- echo 1...COMPARE TWO STRINGS echo 2...JOIN TWO STRINGS echo 3...FIND THE LENGTH OF A GIVEN STRING echo 4...OCCURRENCE OF CHARACTER AND WORDS echo 5...REVERSE THE STRING echo --------------------------------------- echo Enter Choice: read ch echo ---------------------------------------  case $ch in  1)         echo Enter String1:         read str1         echo Enter String2:         read str2          if [ $str1 = $str2 ]         then                 echo String is equal         else                 echo String is not equal         fi         ;; 2)         echo Enter String1:         read str1         echo Enter String2:         read str2          str3=$str1$str2         echo Join String: $str3         ;; 3)         length=0         echo Enter String1:         read str1         length=`expr $str1 | wc -c`         length=`expr $length - 1`         echo Length: $length         ;; 4)         echo Enter String:         read str          echo Enter Word to find         read word          echo $str | cat > str1.txt          grep -o $word str1.txt | cat > str2.txt         count=`grep -c $word str2.txt`      echo Count: $count     ;; 5)         echo Enter String1:         read str          len=`expr $str | wc -c`         len=`expr $len - 1`         while [ $len -gt 0 ]         do                 rev=`expr $str | cut -c $len`                 ans=$ans$rev                 len=`expr $len - 1`         done         echo Reverse String: $ans         ;;  *)         echo Wrong Choice         ;; esac         echo Do u want to continue?     read ans     if [ $ans = n ]     then         exit     fi done  

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/*     20. Write a script to check whether a given string is palindrome or not. */ echo Enter String read str      length=0     cnt=1     flag=0  length=`expr $str | wc -c` length=`expr $length - 1` temp=`expr $length / 2`  while test $cnt -le $temp do         rev=`expr $str | cut -c $cnt`         ans=`expr $str | cut -c $length`          if [ $rev != $ans ]         then                 flag=1         fi          cnt=`expr $cnt + 1`         length=`expr $length - 1` done  if [ $flag -eq 0 ] then         echo String is palindrome else         echo String is not palindrome fi 

****************************************************************** 1.Check the output of the following commands.  mkdir and rmdir   ****************************************************************** [Divya@linux ~]$ mkdir family [Divya@linux ~]$ cd family [Divya@linux family]$ mkdir grpr [Divya@linux family]$ rmdir grpr [Divya@linux family]$ mkdir parent [Divya@linux parent]$ mkdir child [Divya@linux parent]$ cd child [Divya@linux child]$  cat c1 it is first fle ^z [Divya@linux child]$ls c1 [Divya@linux child]$cd ../ [Divya@linux family]$ cd ../.. [Divya@linux home]$ 

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2. ****************************************************************** 2.2 Accept the string and checks whether the string is palindrome or not. ****************************************************************** echo "enter the string" read a  b=`echo $a|rev` #c=`echo $a -eq $b`  if [ "$a" == "$b" ] ; then         echo "pali " else          echo "not pla"  fi [ketan@linux ~]$ sh k2.sh enter the string mom pali [ketan@linux ~]$ sh k2.sh enter the string divya not pla ****************************************************************** 2.3 Accept number and check the number is even or odd, finds the length of the number, sum of the digits in the number. ****************************************************************** echo  "Enter the number"  read n  if [ $[$n % 2] -eq 0 ]  then     echo " $n is even" else    echo " $n is odd " fi  ****************************************************************** or ****************************************************************** 2.3 Accept number and check the number is even or odd, finds the length of the number, sum of the digits in the number ****************************************************************** echo "Enter the Number" read a  z=$a cont=0 sum=0 sd=0 while [ $a -gt 0 ] do     sd=`expr $a % 10`     cont=`expr $cont + 1`     sum=`expr $sum + $sd`     a=`expr $a / 10` done     echo  "Sum of digit for numner is $sum"     echo  " Total length $cont"  b=`expr $z % 2`  if test $b -eq 0 then echo "Even number" else  echo "Odd Number" fi ****************************************************************** 2.4  Accept strings and replace a string by another string.   ****************************************************************** echo enter string read stringname echo enter replacable string read replacename echo enter file name read filename  sed s/$stringname/$replacename/g $filename > temp ~ [divya@linux ~]$ sh 4.sh enter string payal enter replacable string pallavi enter file name s [divya@linux ~]$ cat temp roll no       name        marks 1              vaishali    50 2              viraj       40 3              sonal       50 4              pallavi     30------------- 5              nehal       40 6              pallavi     60-------------- [divya@linux ~]$ cat s roll no       name        marks 1              vaishali    50 2              viraj       40 3              sonal       50 4              payal       30 5              nehal       40 6              payal       60   ************************************************************************************************************************************ 2.5 Accept filename and displays last modification time if file exists, otherwise display appropriate message. ************************************************************************************************************************************  echo "Enter the file name" read a z=`pwd $a` if [ -d $z/$a ] then     b=`ls -lt $a`     echo $b elif [ -f $z/$a ] then         q=`ls -lt $a`         echo $q else        echo " no such file or directory exist" fi "5.sh" 19L, 204C written [divya@linux ~]$ ls 1     3.sh  6.sh  d2  exist.sh  first     s      temp2 2.sh  5.sh  d1    d3  f         login.sh  temp1 [divya@linux ~]$ sh 5.sh Enter the file name first -rw-rw-r-- 1 divya divya 182 2010-07-31 14:58 first [divya@linux ~]$ sh 5.sh Enter the file name d1 total 8 -rw-rw-r-- 1 divya divya 4 2010-07-30 13:38 first [divya@linux ~]$ sh 5.sh Enter the file name d4  no such file or directory exist  ****************************************************************** 2.6 Fetch the data from a file and display data into another file in reverse order. ******************************************************************  echo "Enter the file name" read a b=`cat $a` echo $b `sort -r $a > first `  "2.sh" 8L, 80C written [divya@linux ~]$ cat first [divya@linux ~]$ cat s roll no       name        marka 1              vaishali    50 2              viraj       40 3              sonal       50 4              payal       30 5              nehal       40 [divya@linux ~]$ sh 2.sh Enter the file name s roll no name marka 1 vaishali 50 2 viraj 40  3 sonal 50  4 payal 30   5 nehal 40 [divya@linux ~]$ cat first roll no       name        marka 5              nehal       40 4              payal       30 3              sonal       50 2              viraj       40 1              vaishali    50 ****************************************************************** 

#2.a) Accept numbers and perform addition, subtraction, division and multiplication. a=10 echo "Enter The Value of A: " read a b=10 echo "Enter The Value of B: " read b c=0 c=`expr $a + $b` echo "Addition " $c c=`expr $a - $b` echo "Subtraction " $c c=`expr $a / $b` echo "Division " $c c=`expr $a \* $b` echo "Multiplication " $c  #b) Accept the string and checks whether the string is palindrome or not. l=0 cnt=1 tag=0 echo "Enter a String?" read str l=`echo $str |wc -c` l=`expr $l - 1` lh=`expr $l / 2` while [ $cnt -le $lh ] do c1=`echo $str|cut -c$cnt` c2=`echo $str|cut -c$l`     if [ $c1 != $c2 ]     then         tag=1     fi cnt=`expr $cnt + 1` l=`expr $l - 1` done if [ $tag -eq 0 ] then echo "String is Palindrome" else echo "String is not Palindrome" fi   #c.Accept number and check the number is even or odd, finds the length of the number, sum of the digits in the number.  echo "Enter number:" read no c=`expr $no % 2` if [ $c -eq 0 ] then  echo "No is even " else  echo "No is odd" fi cnt=`echo $no | wc -c` cnt=`expr $cnt - 1` echo "word count =" $cnt i=1 while [ $i -le $cnt ] do j=`echo $no | cut -c $i` k=`expr $k + $j` i=`expr $i + 1` done echo "total =" $k   #d.Accept strings and replace a string by another string. echo "Enter any string:" read str echo "Your string is :" $str  echo "Enter word that your what replace with other word" read oldstr echo "Enter new string" read newstr str1=`echo $str | sed s/$oldstr/$newstr/g`  str2=`echo $str | replace $oldstr $newstr` echo "after replacing " $str1 echo "after replacing " $str2   #e.Accept filename and displays last modification time if file exists, otherwise display appropriate message.  echo "Enter file name" read fnm  if [ ! -f $fnm ] then     echo "File  Not Found"     exit 1 fi dt=`date -r $fnm` echo "modification date is:" $dt  #f.Fetch the data from a file and display data into another file in reverse order. echo "enter file name for fatching data and store in other file" read fnm if [ ! -f $fnm ] then     echo "File not found"     exit 1 fi echo "enter new file name:" read newfile while read -n1 char; do     str=$char$str done<$fnm echo $str>$newfile echo $newfile "successfully created on" `pwd` " path" 

#!/usr/bin/env bash # GTU3: Write a script to find the global complete path for any file. # Code written By: Rushyang Darji # Last Updated: 19.10.2010 # Visit My Online Repository: "http://github.com/rushyang/GTU-OS-Bash-Scripts" for regular updates and more scripts.  echo -e "Enter the filename to search in current directory: \c" read FILE  args=`find . -name $FILE | xargs`    # xargs builds arguments from find, for using in "for loop"... Remember, you should never Parse result of "ls" in any case because unix allows every character to be used in naming files, even if a "new line character"... execute "touch $'A\nFile'" to make file and ls to know it. Google "parsing output of ls" to know more.   for i in $args     do      if [ -f "$i" ]; then             CPATH=`readlink -f "$i"`    # readlink returns the symbolic link, -f canonicalize by every parent directory recursively.         echo $CPATH     fi done  noargs=${#args}                    # noargs stores total number of arguments. if [ "$noargs" -eq "0" ]; then     echo "No such a file exists" fi 

3.Write a script to find the global complete path for any file. ****************************************************************** echo "enter the filename" read a b=`pwd $a` if [ -f $b/$a ] then         echo "file exist"         echo $b else         echo "file does not exist" fi ~ ~ "3.sh" 11L, 131C written [divya@linux ~]$ sh 3.sh Enter the filename f file exist /home/divya [divya@linux ~]$ sh 3.sh Enter the filename d1 file does not exist  or  echo "enter file name to find:" read fnm ans=0; if [ ! -f $fnm ] then     if [ ! -d $fnm ]     then         echo "File not found"         exit 1     fi fi ans=`find /home -name $fnm ` echo $ans  ****************************************************************** 

#3.3. Write a script to find the global complete path for any file. echo "enter file name to find:" read fnm ans=0; if [ ! -f $fnm ] then      if [ ! -d $fnm ]     then         echo "File not found"         exit 1     fi fi ans=`find /home -name $fnm ` echo $ans 

4.  Program :- message Broadcast for a Single User,Multiple Users and to All   ****************************************************************** who > e.txt  echo "For Broadcasting Messages."  if [ $# = 0 ] then     echo "Enter the User Name:\c"     read nam     p=`grep $nam e.txt`     if [ "$p" != "" ]     then         write $nam         rm e.txt         exit     else        echo "The user is not logged in"     fi     rm e.txt     exit                                   fi   if [ "$1" = "all" ] then     wall fi   for nam in $* do    p=`grep $nam e.txt`    if [ "$p" != "" ]    then        write $nam    else        echo "The User $nam is not logged in"    fi  done                       output [Divya@linux ~]$ sh 4.sh For Broadcasting Messages. Enter the User Name:\c bhoomika hellow to u  [8]+  Stopped                 sh 4.sh [Divya@linux ~]$ sh 4.sh For Broadcasting Messages. Enter the User Name:\c ketan The user is not logged in [Divya@linux ~]$ ****************************************************************** 

echo "Enter the User name :" read uname echo "Enter String u want to send (End with Control-D) :" write $uname echo -e "\nYour message send successfully...." 

#!/usr/bin/env bash # GTU 5 - Write a script to copy the file system from two directories to a new directory in such a way that only the latest file is copied in case there are common files in both the directories. # Code written By: Rushyang Darji # Last Build: 24.08.2010 # Visit My Online Repository: "http://github.com/rushyang/GTU-OS-Bash-Scripts" for regular updates and more scripts.  EXIT=n while [ $EXIT != y ] do     sleep 1     echo -e "\n"     echo -e "    1. Display PWD     2. Long Listing     3. Change Directory     4. Copy Newest File.      5. Exit         Enter Choice: \c"     read ch  case $ch in   1)      clear     pwd ;;  2)          clear     pwd     ls -l ;;  3)      echo -n "Enter Absolute Path to change directory: "     read apath      cd $apath      if [ $? -eq 0 ]; then            # We can also check for availibility of directory before 'cd' command by 'test -d $apath' i.e. 'if [ -d $apath ]'         clear         echo "Working Directory Changed successfully to.."         sleep 1         pwd     else         clear         echo "Please check your PATH."     fi ;;  4)      clear     echo "Enter filenames to copy. ( * - for ALL Files, ELSE Separate files by spaces )"     read allfiles     if [ -f $allfiles ]; then         echo "Enter Absolute path, where to copy these files: "         read -e cpath         if [ -d $cpath ]; then             cp -u "$allfiles" $cpath        # -u copies only when the SOURCE file is newer than the destination file or when the destination file is missing         else             echo "There is no such a directory!"         fi     else         echo "There is/are no such file(s)!"     fi ;;  5)      clear      echo -n "Exiting.."     sleep 1     echo -n "."         sleep 1     echo -n "."     clear     exit ;;  *)     clear     echo "Invalid Choice" ;;  esac done 

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#!/usr/bin/env bash # Code written By: Rushyang Darji # Last Build: 09.10.2010 # Visit My Online Repository: "http://github.com/rushyang/GTU-OS-Bash-Scripts" for regular updates and more scripts.  while true; do     read -e -p "Enter first Directory's Absolute path: " path1 || exit     [[ -d $path1 ]] && break         echo "Invalid path, Try Again!" done  while true; do     read -e -p "Enter second Directory's Absolute path: " path2 || exit     [[ -d $path2 ]] && break         echo "Invalid path, Try Again!" done  while true; do     read -e -p "Enter Third Directory's Path, to copy files in case of exact match: " path3 || exit     [[ -d $path3 ]] && break         echo "Invalid Path, Try, Again!" done  temp=$(mktemp) for i in $path1/* do         if [ -f "$i" ]; then     for j in $path2/*     do         if [ -f "$j" ]; then         base1=`basename "$i"`         base2=`basename "$j"`         if [ "$base1" = "$base2" ]; then             diff "$i" "$j" > $temp                          size=`ls -s $temp | awk '{print $1}'`             if [ "$size" -eq "0" ]; then                 echo "File: \"$base1\" was found same in both directories."                 cp "$i" "$path3"                 echo "Copied to \"$path3\" successfully!"             fi         fi         fi     done     fi done  rm $temp  : << --      OUTPUT (Attempt 1) rushyang@Maverick_Meerkat: GTU-MCA $ bash GTU6-2.sh  Enter first Directory's Absolute path: /home/rushyang/sldjf Invalid path, Try Again! Enter first Directory's Absolute path: /home/rushyang/Experiments/1510/mydir1/ Enter second Directory's Absolute path: /home/rushyang/lsajlj Invalid path, Try Again! Enter second Directory's Absolute path: /home/rushyang/Experiments/1510/mydir2/ Enter Third Directory's Path, to copy files in case of exact match: /home/rushyang/Experiments/1510/mydir3/ File: "1" was found same in both directories. Copied to "/home/rushyang/Experiments/1510/mydir3/" successfully! File: "new file" was found same in both directories. Copied to "/home/rushyang/Experiments/1510/mydir3/" successfully!       OUTPUT (Attempt 2) rushyang@Maverick_Meerkat: GTU-MCA $ bash GTU6-2.sh  Enter first Directory's Absolute path: /home/rushyang/Experiments/1510/mydir1/ Enter second Directory's Absolute path: /home/rushyang/Experiments/1510/mydir2/ Enter Third Directory's Path, to copy files in case of exact match: /home/rushyang/Experiments/1510/mydir3/ File: "1" was found same in both directories. Copied to "/home/rushyang/Experiments/1510/mydir3/" successfully! File: "new file" was found same in both directories. Copied to "/home/rushyang/Experiments/1510/mydir3/" successfully! --  ########################   OR    ########################  #!/usr/bin/env bash # Code written By: Rushyang Darji # Last Build: 02.10.2010 # Visit My Online Repository: "http://github.com/rushyang/GTU-OS-Bash-Scripts" for regular updates and more scripts.  : << --  GTU 6: Write a script to compare identically named files in two different directories and if they are same, copy one of them in a third directory  Code Developed By: Rushyang Y Darji (rushyang@yahoo.co.in) Init Build: 04.08.2010 Last Build: 15.10.2010 v1.6 --  clear temp=$(mktemp tmp.XXXXXXXX)    #mktemp makes temporary file into /temp directory with r+w permissions only for creator. echo -n "Enter 1st Directory: " read dir1 PATH1="$(pwd)/$dir1"    #Converted whole path of dir1 into PATH1 variable  echo "PATH1=$PATH1" main=$(pwd) if test -d $PATH1; then    #Test condition to make sure dir1 is a directory.     echo -n "Enter 2nd Directory: "     read dir2     PATH2="$(pwd)/$dir2"    #Same as Line 14     echo "PATH2=$PATH2"     if test -d $PATH2; then         cd $PATH1    #Secured for using for i loop.         for i in *         do             cd $PATH2    #Secured for using for j loop.             for j in *             do                 if test "$i" == "$j"; then                     cd $main        #Back to $(basedir)                     cmp "$PATH1/$i" "$PATH2/$j" > $temp                         # cmp checks byte by byte.. can be little slower than 'diff'                      size=`ls -s $temp | awk '{print $1}'` # '-s' for listing size, and 'awk' for fetching size of $temp                     if test "$size" == "0"; then    # if size of temporary file is 'ZERO', then both files are exactly same.                         echo "File: \"$i\" was found same in both directories."                         echo -n "Enter Directory name (must be in current working directory) to copy it: "                         read dir3                         PATH3="$(pwd)/$dir3"    #Same as Line 14                         if test -d $PATH3; then                                 cp -i "$PATH1/$i" "$PATH3"    # "$PATH2/$j" instead of "$PATH1/$i" will also do.                         else                             echo "There is no directory named $dir3 in $pwd"    #Line 41                         fi                     fi                                      fi             done         done     else         echo "Invalid Directory Name for dir2."    #Error Message of missing dir2     fi else     echo "Invalid Directory Name for dir1."    #Error Message of missing dir3 fi  rm $temp      : << --  rushyang@Maverick_Meerkat: 1510 $ ls mydir1/ 1  2  new file rushyang@Maverick_Meerkat: 1510 $ ls mydir2/ 1  new file  T rushyang@Maverick_Meerkat: 1510 $ ls mydir3/          OUTPUT (Attempt 1) Enter 1st Directory: asdf PATH1=/home/rushyang/Experiments/1510/asdf Invalid Directory Name for dir1.          OUTPUT (Attempt 2) Enter 1st Directory: mydir1 PATH1=/home/rushyang/Experiments/1510/mydir1 Enter 2nd Directory: mydir2 PATH2=/home/rushyang/Experiments/1510/mydir2 File: "1" was found same in both directories. Enter Directory name (must be in current working directory) to copy it: mydir3 File: "new file" was found same in both directories. Enter Directory name (must be in current working directory) to copy it: mydir3          OUTPUT (Attempt 3) Enter 1st Directory: mydir1     PATH1=/home/rushyang/Experiments/1510/mydir1 Enter 2nd Directory: mydir2 PATH2=/home/rushyang/Experiments/1510/mydir2 File: "1" was found same in both directories. Enter Directory name (must be in current working directory) to copy it: mydir3 cp: overwrite `/home/rushyang/Experiments/1510/mydir3/1'? y File: "new file" was found same in both directories. Enter Directory name (must be in current working directory) to copy it: mydir3 --   

6.Write a script to compare identically named files in two different directories and if they are same, copy one of them in a third directory. ****************************************************************** echo Enter the name of 1st directory         read dir1         echo Enter the name of 2nd directory         read dir2         echo Enter the name of the directory in which you want to copy the duplicate file          read dir3         cd `find /home/divya -type d -name $dir1`         for fl1 in *         do          echo $fl1            cd `find /home/divya -type d -name $dir2`            for fl2 in *              do                 if [ $fl1 == $fl2 ]                 then                         cd ..                         cp ./$dir2/$fl2 ./$dir3                         cd `find /home/divya -type d -name $dir2`                          rm $fl2                         cd `find /home/divya -type d -name $dir1`                          rm $fl1                 fi              done          cd ..           mv ./temp1/* ./$dir2/$fl2        done ~ ~ ~ ~ ~ "6.sh" 29L, 876C written [divya@linux ~]$ sh 6.sh Enter the name of 1st directory d1 Enter the name of 2nd directory d2 Enter the name of the directory in which you want to copy the duplicate file d3 first [divya@linux ~]$ ****************************************************************** 

echo "Enter 1st file full path(/home/mca/diz/) :" read p1  echo "Enter 2nd file full path(/home/mca/diz/) :" read p2  echo "Enter new path for copy" read dest a=`cmp $p1 $p2`  if [ $? -eq 0 ] then     `cp $p2 $dest`     echo "File successfully copied on path: "$dest      else     echo "File not identically same"      fi 

#!/usr/bin/env bash # Code Developed By: Rushyang Darji # Last Build: 14.09.2010 # Visit My Online Repository: "http://github.com/rushyang/GTU-OS-Bash-Scripts" for regular updates and more scripts. while true; do     read -e -p "Enter the Absolute Path: " path || exit     [[ -d $path ]] && break     echo "Invalid Directory!" done   args=`find "$path" -empty -print0 | xargs -0` for i in $args do     if [ -f "$i" ]; then         rm -i "$i"     fi done   

7.Write a script to delete zero sized files from a given directory (and all its sub-directories). ****************************************************************** echo Enter the file  you want to delete read zerofile  if [ ! -f $zerofile ] then       echo "File is does not exists"  elif [ ! -s $zerofile ]        then                rm -i $zerofile         else                 echo " file has some data"          fi  "7.sh" 19L, 303C written [divya@linux ~]$ sh 7.sh Enter the file you want to delete el.lst File is does not exists [divya@linux ~]$ ls 6.sh  71.sh  7.sh  d1  d2  d3  e.lst  emp.lst  temp1 [divya@linux ~]$ sh 7.sh Enter the file you want to delete e.lst rm: remove regular empty file `e.lst'? y [divya@linux ~]$ ls 6.sh  71.sh  7.sh  d1  d2  d3  emp.lst  temp1  or  echo Enter the file extention you want to delete : read ext if [ -n *.$ext ] then         rm -i *.$ext else         echo No such extension file fi for i in file * do         if [ ! -s $zerofile ]        then                rm -i $zerofile         fi done ****************************************************************** 

for i in `find /home/mca/diz/diz -type f -size 0c` do     echo "$i has Zero size"     echo `rm $i` done 

#!/usr/bin/env bash # Write a script to display the name of those files (in the given directory) which are having multiple links. # Developed By: Rushyang Darji # Init Build: 15.10.2010 # Last Build: 15.10.2010 # v1.0 # Visit My Online Repository: "http://github.com/rushyang/GTU-OS-Bash-Scripts" for regular updates and more scripts.  echo "Enter Absolute path of directory" read path  if test -d $path; then     cd $path     for i in *     do         for j in *         do                 if test "$i" != "$j"; then                 if test "$i" -ef "$j"; then                     echo "$i" >> $$.temp                 fi             fi                     done     done      cat $$.temp | uniq     rm $$.temp     cd - else     echo "Check your path." fi  ###############   OR   ###############  #!/usr/bin/env bash # Write a script to display the name of those files (in the given directory) which are having multiple links. # Developed By: Rushyang Darji # Init Build: 15.10.2010 # Last Build: 15.10.2010 # v1.0 # Visit My Online Repository: "http://github.com/rushyang/GTU-OS-Bash-Scripts" for regular updates and more scripts.  temp=$(mktemp tmp.XXXXXXXXXX) while true; do     read -e -p "Ente the Absolute Path: " path || exit     [[ -d $path ]] && break     echo "Invalid Directory!" done  for i in $path/* do     for j in $path/*     do         base1=`basename $i`         base2=`basename $j`         echo "$i"         echo "$j"         if test "$base1" != "$base2"; then             if test "$base1" -ef "$base2"; then                 echo "$base1" >> $temp             fi         fi     done done  cat $temp | uniq rm $temp   

Share this program... Send it to gtumca@gmail.com with your Name - College name.. and share what you want ... at same mail id... Thanx in advance... Be connected... D_i_Z 

#!/usr/bin/env bash # GTU 9 # Code Developed by: Rushyang Darji # Last Updated: 14.10.2010 # Visit My Online Repository: "http://github.com/rushyang/GTU-OS-Bash-Scripts" for regular updates and more scripts. # Remember, You should NEVER parse the output of "ls" command and use into scripts. Because UNIX filesystem allows all kind of characters to assign a filename, including "new line". For more info.. Google "parsing output of ls". # read -e enables Tab Completion which is way too easier than entering whole absolute path. read -e -p "Enter Absolute Path: " path || exit temp=$(mktemp) if test -d $path; then      for i in $path/*     do              if test -x "$i"; then             echo "$i" >> "$temp"         fi     done else     echo "Invalid Directory" fi  cat $temp rm $temp  

9. Write a script to display the name of all executable files in the given directory. ****************************************************************** i=0            ls > test1            set `wc -l test1`            l=$1            while [ $l -ne 0 ]            do                 line=`head -$l test1 | tail -1`                 if [ -x $line ]                 then                         i=`expr $i + 1`                 fi                 l=`expr $l - 1`            done            echo -e "\t\t\tTotal no. of executable files : "            echo $i ~ ~ ~ ~ "9.sh" 15L, 267C written [divya@linux ~]$ ls -l total 136 -rw-rw-r-- 1 divya divya  395 2010-07-31 16:01 13.sh -rw-rw-r-- 1 divya divya  108 2010-07-31 14:58 2.sh -rw-rw-r-- 1 divya divya  131 2010-07-31 15:31 3.sh -rw-rw-r-- 1 divya divya  204 2010-07-31 15:28 5.sh -rw-rw-r-- 1 divya divya  848 2010-07-29 16:40 6.sh -rw-rw-r-- 1 divya divya  267 2010-07-31 16:07 9.sh drwxrwxr-x 2 divya divya 4096 2010-07-30 13:38 d1 ------------- drwxrwxr-x 2 divya divya 4096 2010-07-29 16:41 d3 ------------ -rw-rw-r-- 1 divya divya  122 2010-07-31 15:17 exist.sh -rw-rw-r-- 1 divya divya  182 2010-07-31 14:59 f -rw-rw-r-- 1 divya divya  182 2010-07-31 14:58 first -rw-rw-r-- 1 divya divya  257 2010-07-29 16:37 login.sh -rw-rw-r-- 1 divya divya  182 2010-07-31 14:55 s -rw-rw-r-- 1 divya divya  260 2010-07-31 15:53 s1 drwxrwxr-x 2 divya divya 4096 2010-07-29 16:41 temp1 ------------------ -rw-rw-r-- 1 divya divya   25 2010-07-31 15:13 temp2 -rw-rw-r-- 1 divya divya   86 2010-07-31 16:06 test1 [divya@linux ~]$ sh 9.sh                         Total no. of executable files : 3 ****************************************************************** 

Share this program... Send it to gtumca@gmail.com with your Name - College name.. and share what you want ... at same mail id... Thanx in advance... Be connected... D_i_Z 

#!/usr/bin/env bash # GTU10: Write a script to display the date, time and a welcome message (like Good Morning should be displayed with “a.m.” or “p.m.” and not in 24 hours notation. # Code written By: Rushyang Darji # Last Updated: 19.08.2010 # Visit My Online Repository: "http://github.com/rushyang/GTU-OS-Bash-Scripts" for regular updates and more scripts.   msg2=`date +%H` echo "Welcome $USERNAME!" time=`date +"%F  %I:%M:%S %p"` echo "Current Time is: $time"  if [[ "$msg2" -ge "5" ]] && [[ "$msg2" -lt "12" ]]; then      echo "Good Morning..!" elif [[ "$msg2" -ge "12" ]] && [[ "$msg2" -lt "17" ]]; then      echo "Good Afternoon..!" elif [[ "$msg2" -ge "21" ]] && [[ "$msg2" -lt "19" ]]; then     echo "Good Evening..!" else     echo "Good Night..!" fi  

10 Write a script to display the date, time and a welcome message (like Good Morning etc.). The time should be displayed with “a.m.” or “p.m.” and not in 24 hours notation ****************************************************************** tput clear hr=`date +%I` set `who am i` a=`echo $1` set `date +%r` b=`echo $1 $2` if [ $hr -lt 12 ] then         echo "welcome `$a $b`  Good Morning" elif [ $hr -ge 12 ]         then             echo "Welcome $a $b GOOD Afternoon"  elif [ $hr -ge 16 -o $hr -le 20  ]       then              echo "Good Evening"   else        echo "God Night" fi or  tput clear hr=`date +%H`  if [ $hr -lt 12 ] then         echo "welcome `who`   Good Morning" elif [ $hr -gt 12 ]         then             echo "Welcome `who` GOOD Afternoon"  elif [ $hr -eq 17 || $hr -lt 24 ]       then              echo "Good Evening"   else        echo "God Night" fi  ~ ~ Output  [Divya@linux ~]$ sh time.sh Welcome GOOD Afternoon  or  time=`date +%H%M%S` d1=`date +%d/%m/%y` t1=`date +%I:%M:%S` echo "date:"$d1 if [ $time -ge 000000 -a $time -lt 120000 ] then      echo "time:"$t1" a.m"  else       echo "time:"$t1" p.m"  fi  if [ $time -lt 120000 -a $time -gt 60000 ] then     echo "GooD MorninG" else     if [ $time -eq 120000 ]     then         echo "GooD NooN"     else         if [ $time -gt 120000 -a $time -lt 180000 ]         then             echo "GooD AfterNooN"           else             if [ $time -gt 180000 -a $time -lt 210000 ]             then                 echo "GooD EveninG"             else                 echo "GooD NighT"             fi         fi     fi fi "101.sh" 33L, 661C written [divya@linux ~]$ sh 101.sh date:04/10/10 time:12:35:28 p.m GooD AfterNooN [divya@linux ~]$ or   clear                   date >dt                  s=`cut -c 12-13 dt`                  echo $s                  if [ $s -lt 12 ]                 then                         echo "GOOD MORNING"                 elif [ $s -gt 12 -o $s -lt 16 ]                 then                         echo "GOOD AFTERNOON"                 elif [ $s -gt 16 -o $s -lt 20 ]                 then                         echo "GOOD EVENING"                 else                         echo "good night"                 fi  ~ ~ ~ 16 GOOD AFTERNOON [divya@linux ~]$ **************************************************************** 

time=`date +%H%M%S` d1=`date +%d/%m/%y` t1=`date +%I:%M:%S` echo "date:"$d1 if [ $time -ge 000000 -a $time -lt 120000 ] then      echo "time:"$t1" a.m"  else            echo "time:"$t1" p.m"  fi       if [ $time -lt 120000 -a $time -gt 60000 ] then     echo "GooD MorninG" else      if [ $time -eq 120000 ]     then         echo "GooD NooN"     else         if [ $time -gt 120000 -a $time -lt 180000 ]         then              echo "GooD AfterNooN"         else             if [ $time -gt 180000 -a $time -lt 210000 ]             then                 echo "GooD EveninG"             else                 echo "GooD NighT"             fi         fi     fi fi