Home >> Sem 3 >> 630007 - Programming Skills-V (OS) [1/3]
1. Check the output of the following commands.....
****************************************************************** 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. Write shell script...
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"
3. Write a script to find the global complete path for any file....
#!/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. Write a script to broadcast a message to a specified user or a group...
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...."
5. Write a script to copy the file system from two directories to a...
#!/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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6. Write a script to compare identically named files in two different...
#!/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
7. Write a script to delete zero sized files from a given directory ...
#!/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
8. Write a script to display the name of those files (in the given directory...
#!/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 $temp
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9. Write a script to display the name of all executable...
#!/usr/bin/env bash # GTU 9 # Code Developed by: Rushyang Darji # Last Updated: 14.10.2010 # Visit My Online Repository: "http://github.com/rushyang/GTU-OS-Bash-Scripts" for regular updates and more scripts. # Remember, You should NEVER parse the output of "ls" command and use into scripts. Because UNIX filesystem allows all kind of characters to assign a filename, including "new line". For more info.. Google "parsing output of ls". # read -e enables Tab Completion which is way too easier than entering whole absolute path. read -e -p "Enter Absolute Path: " path || exit temp=$(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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10.Write a script to display the date, time and a welcome ...
#!/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
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