Write a shell script to check whether the named user is currently logged in or not.
File Name : ex16.sh
clear
echo
"Enter user name : \c"
read
unm
unm1=$(who
| cut -d " " -f 1)
if
[ "$unm" = "$unm1" ]
then
echo " [ $unm ] is already Login"
else
echo " [ $unm ] is not
Login"
fi
Write a script which reads a text file and output key attribute of file
Write a script which reads a text file and output the following
1). Count
of character, words and lines.
2). File
in reverse.
3). Frequency
of particular word in the file.
4). Lower
case letter in place of upper case letter.
File Name : ex15.sh
echo
"Enter File Name \c"
read
fname
choice=y
while
[ "$choice" = "y" ]
do
echo
" ------------------------------------"
echo " 1. Count character,words and lines"
echo " 2. Reverse File"
echo " 3. Found frequency of word"
echo " 4. Convert upper to lower"
echo " 5. Convert lower to upper"
echo " 6. Exit
echo " ------------------------------------"
echo
"Enter Choice: \c"
read
ch
case
$ch in
1)
echo "Total Characters:\c"
wc -c $fname
echo "Total Words:\c"
wc -w $fname
echo "Total Lines:\c"
wc -l $fname
;;
2)
rev $fname
;;
3)
echo "Find your word :\c"
read w
echo "Frequency:\c"
grep
-c "$w" $fname
;;
4)
echo "Enter Text : \c"
read text
echo $text | tr "[A-Z]"
"[a-z]"
;;
5)
echo "Enter Text : \c"
read text
echo $text | tr "[a-z]"
"[A-Z]"
;;
6) exit
;;
*) echo "Invalid Choice ....."
;;
esac
echo "Do u want to continue.....?
[y/n]"
read choice
case $choice in
Y|y) choice=y;;
N|n) choice=n;;
*) choice=y;;
esac
done
Write a script to make following file and directory management operations
14. Write a script to make following file and directory management operations menu
based:
Display
current directory
List
directory
Make
directory
Change
directory
Copy
a file
Rename
a file
Delete
a file
Edit
a file
File Name : ex14.sh
clear
choice=y
while
[ "$choice" = "y" ]
do
echo "____________________________________"
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 "____________________________________"
echo
"ENTER THE CHOICE :- "
read
choice
case
$choice in
1) pwd;;
2) ls
-l;;
3) echo "Enter Directory Name "
read dir_name
mkdir $dir_name
echo "[ $dir_name ]
Sucessfully Created Directory"
;;
4) echo
"Enter the Absolute Path to change the directory: "
read apath
cd $apath
echo "Working path
changed successfully!"
pwd
;;
5) echo
"Enter name of file: "
read filename
echo "Copy where?
"
read apath
cp $filename $apath
echo "File
$filename copied successfully to $apath"
;;
6) echo
"Enter Current File Name: "
read oname
echo "Enter New File Name: "
read nname
mv $oname $nname
;;
7) echo
"Enter file Name : "
read fdel
if
[ -f $fdel ]; then
rm -i $fdel
fi
;;
8) echo
"Enter filename to open it in Text Editor: "
read filename
cat $filename
cat >> $filename
#vi $filename
;;
9) exit
;;
*) echo
"Invalid Choice ....."
;;
esac
echo "Do u want to continue.....?
[ y / n ]"
read choice
case $choice in
Y|y) choice=y;;
N|n) choice=n;;
*) choice=y;;
esac
done
Write a shell script to add the statement #include at the beginning of every C source file in current directory containing printf and fprintf.
clear
grep -l -e "printf" -e "fprintf" *.c > temp.txt
#grep
# -l, --files-with-matches
# Suppress normal output; instead print the name of each input
# file from which output would normally have been printed.
# -e PATTERN, --regexp=PATTERN
# Use PATTERN as the pattern. This can be used to specify
# multiple search patterns
for i in `cat temp.txt`
do
sed '1i\#include<stdio .h=".h">' $i > temp2.txt
cat temp2.txt > $i
echo "Successfully Added..."
done
# sed i :
# -i[SUFFIX], --in-place[=SUFFIX]
# edit files in place (makes backup if extension supplied)
# sed l :
# -l N, --line-length=N
# specify the desired line-wrap length for the `l' command
</stdio>
grep -l -e "printf" -e "fprintf" *.c > temp.txt
#grep
# -l, --files-with-matches
# Suppress normal output; instead print the name of each input
# file from which output would normally have been printed.
# -e PATTERN, --regexp=PATTERN
# Use PATTERN as the pattern. This can be used to specify
# multiple search patterns
for i in `cat temp.txt`
do
sed '1i\#include<stdio .h=".h">' $i > temp2.txt
cat temp2.txt > $i
echo "Successfully Added..."
done
# sed i :
# -i[SUFFIX], --in-place[=SUFFIX]
# edit files in place (makes backup if extension supplied)
# sed l :
# -l N, --line-length=N
# specify the desired line-wrap length for the `l' command
</stdio>
Write a script to implement the following commands:Tree (of DOS) which (of UNIX)
Tree (of DOS)
echo
if [ "$1" != "" ] #if parameter exists, use as base folder
then cd "$1"
fi
pwd
ls -R | grep ":$" | \
sed -e 's/:$//' -e 's/[^-][^\/]*\//--/g' -e 's/^/ /' -e 's/-/|/'
# 1st sed: remove colons
# 2nd sed: replace higher level folder names with dashes
# 3rd sed: indent graph three spaces
# 4th sed: replace first dash with a vertical bar
if [ `ls -F -1 | grep "/" | wc -l` = 0 ] # check if no folders
then echo " -> no sub-directories"
fi
echo
exit
if [ "$1" != "" ] #if parameter exists, use as base folder
then cd "$1"
fi
pwd
ls -R | grep ":$" | \
sed -e 's/:$//' -e 's/[^-][^\/]*\//--/g' -e 's/^/ /' -e 's/-/|/'
# 1st sed: remove colons
# 2nd sed: replace higher level folder names with dashes
# 3rd sed: indent graph three spaces
# 4th sed: replace first dash with a vertical bar
if [ `ls -F -1 | grep "/" | wc -l` = 0 ] # check if no folders
then echo " -> no sub-directories"
fi
echo
exit
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