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****************************************************************** 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   

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#!/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 ****************************************************************** 

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#!/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