unix grep command
Definition : Write a script that deletes all leading and trailing spaces in all lines in a file. Also remove blank lines from a file. Locate lines containing only printf but not fprintf
File Name : ex27.sh
clear
echo "Enter file name : "
read fileName
if [ -f $fileName ]
then
echo "____________________________________"
echo " Trim File .... "
echo "____________________________________"
# Delete leading & trailing whitespace from each line and store it tempFile.txt
sed 's/^[ \t]*//;s/[ \t]*$//;' $fileName >tempFile.txt
# Remove all blank lines from tempFile.txt
sed '/^$/d' tempFile.txt
# Replace content of this two file
mv tempFile.txt $fileName
else
echo "File Not Found"
fi
echo "____________________________________"
echo " Located Lines .... "
echo "____________________________________"
# Locate lines containing only printf but not fprintf
grep -e "printf" $fileName | grep -v "fprint"
Write a script to learn command line argument
Definition : Write a script that behaves both in interactive and non-interactive mode. When no arguments are supplied, it picks up each C program from current directory and lists the first 10 lines. It then prompts for deletion of the file. If the user supplies arguments with the script, then it works on those files only.
File Name : ex26.sh
flag=1
if
[ $# -ne 0 ]
then
# if user provide arguments
echo $* >temp
flag=1
else
# if user not provide arguments
ans=`ls *.c`
if [ "" ==
"$ans" ]
then
echo "There are no
c file"
flag=0
else
ls *.c>temp
flag=1
fi
fi
if
[ $flag -eq 1 ]
then
for filename in `cat temp`
do
if [ -f $filename ]
then
echo "_______________
$filename _______________"
sed -n -e
"1,10 p" $filename
rm -i
$filename
fi
done
rm
temp
fi
Write a script to display the last modified file
File Name : ex24.sh
clear
echo
"Enter Directory Name :\c"
read
dir1
cd
$dir1
ls
-lt | head -2 | tail -1 |cut -d " " -f 10
Write a script to display all lines of a file in ascending order
File Name : ex23.sh
clear
echo
"Enter File Name :\c"
read
filename
sort
$filename
Write a script to display all words of a file in ascending order.
File Name : ex22.sh
echo
"Enter File name:\c"
read
fn
for i in `cat $fn`
do
echo
$i >> f2.txt
done
sort
f2.txt
rm
f2.txt
Write a script to check whether a given number is palindrome or not
File Name : ex21.sh
clear
echo
"Enter No : \c"
read
no
m=$no
rev=0
while
[ $no -gt 0 ]
do
r=`expr $no % 10`
rev=`expr $rev \* 10 + $r`
no=`expr $no / 10`
done
if
[ $m = $rev ]
then
echo " [ $m] is
Palindrome"
else
echo " [ $m ] is not
Palindrome"
fi
Write a script to check whether a given string is palindrome or not
File Name : ex20.sh
clear
echo
"Enter String : \c"
read
s
p=$s
m=`expr
$s | wc -c`
i=`expr
$m - 1`
while
[ $i -ge 1 ]
do
k=`expr $s | cut -c$i`
r=$r$k
i=`expr $i - 1`
echo $k
done
echo $r
if
[ "$p" != "$r" ]
then
echo "It is not
palindrome"
else
echo "It is palindrome"
fi
Write a shell script to mathematics calculation
Definition: Write a script to calculate gross salary for any number of employees
Gross
Salary =Basic + HRA + DA.
HRA=10%
and DA= 15%.
File Name : ex19.sh
clear
echo
"Enter Basic Salary :\c"
read
bs
if
[ $bs -lt 1500 ]
then
hra=`echo $bs \* 10 / 100 | bc`
da=`echo $bs \* 15 /100 | bc`
else
hra=500
da=`echo $bs \* 98/100 | bc`
fi
gs=`echo
$bs + $hra + $da | bc`
echo
" DA : $da"
echo
" HRA : $hra"
echo
"GROSS SALARY : $gs"
Write a shell script to Perform Following String Operations
Definition : Write A Script To Perform Following String Operations Using Menu:
1. COMPARE
TWO STRINGS.
2. JOIN
TWO STRINGS.
3. FIND
THE LENGTH OF A GIVEN STRING.
4. OCCURRENCE
OF CHARACTER AND WORDS
5. REVERSE THE STRING.
File Name : ex18.sh
clear
choice=y
while
[ "$choice" = "y" ]
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
"6. EXIT"
echo
"____________________________________________"
echo
"Enter Choice: \c"
read
ch
echo
"____________________________________________"
case
$ch in
1)
echo "Enter String1: \c"
read str1
echo "Enter String2: \c"
read str2
if [ $str1 = $str2 ]
then
echo "String is
equal"
else
echo "String is not
equal"
fi
;;
2)
echo "Enter String1: \c"
read str1
echo "Enter String2: \c"
read str2
str3=$str1$str2
echo "Join String: \c" $str3
;;
3)
len=0
echo "Enter String1: \c"
read str1
len=$(echo "$str1" | wc
-c)
len=`expr $len - 1`
echo "Length: " $len
;;
4)
echo "Enter String: \c"
read str
echo "Enter Word to find : \c"
read word
echo $str | cat > str1.txt
grep -o $word str1.txt | cat >
str2.txt
count=`grep -c $word str2.txt`
echo "Count: \c"$count
;;
5)
echo "Enter String1: \c"
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 $len - 1`
done
echo "Reverse String: \c"$ans
;;
6) exit ;;
*) echo "Invalid Choice ....." ;;
esac
echo "Do u want to continue.....?
[y/n]"
read choice
case $choice in
Y|y) choice=y;;
N|n) choice=n;;
*) choice=y;;
esac
done
Write a Shell Script for Simple Database Management System Operation
Write
a Script for Simple Database Management System Operation.
Database
File Contains Following Fields.
EMP_NO
EMP_NAME
EMP_ADDRESS
EMP_AGE
EMP_GENDER
EMP_DESIGNATION
EMP_BASIC_SALARY
Provide
Menu Driven Facility For
VIEW
RECORD BASED ON QUERY
ADD
RECORD
DELETE
RECORD
MODIFY
RECORD.
COUNT
TOTAL NUMBER OF RECORDS
EXIT
File Name : Employee.txt
1,bipin,xyz,27,Male,Professor,10000,true
2,hitesh,xyz,27,Male,Accountant,10000,false
3,ritesh,xyz,27,Male,HOD,20000,true
4,mitesh,xyz,27,Male,Clerk,2000,true
5,jitesh,xyz,27,Male,DBA,5000,true
File Name : ex17.sh
clear
AutoNumber()
{
local eno=0
f=0
for j in `cat Employee.txt`
do
eno=$(echo
"$j" | cut -d "," -f 1)
f=1
done
if [ $f = 1 ]
then
eno=`expr $eno + 1`
else
eno=1
fi
echo $eno
}
Insert()
{
clear
eno=$1
echo "Enter Employee No:
$eno"
echo "Enter Employee Name:
\c"
read enm
echo "Enter Employee Address:
\c"
read eadd
echo "Enter Employee Age :
\c"
read eage
echo "Enter Employee Gender:
\c"
read egen
echo "Enter Employee
Designation : \c"
read edes
echo "Enter Employee Basic
Salary : \c"
read ebal
echo "$eno,$enm,$eadd,$eage,$egen,$edes,$ebal,true"
>> Employee.txt
echo " Insert Sucessfully "
}
Display()
{
clear
echo "__________________________________________________"
echo " Employee
Details "
echo "__________________________________________________"
echo "__________________________________________________"
echo "#ENO \t ENAME \t\t EADDR
\t\t\t EAGE \t EGEN \t EDES \t\t EBAL"
for j in `cat Employee.txt`
do
eno=$(echo
"$j" | cut -d "," -f 1)
enm=$(echo
"$j" | cut -d "," -f 2)
eadd=$(echo
"$j" | cut -d "," -f 3)
eage=$(echo
"$j" | cut -d "," -f 4)
egen=$(echo
"$j" | cut -d "," -f 5)
edes=$(echo
"$j" | cut -d "," -f 6)
ebal=$(echo
"$j" | cut -d "," -f 7)
tfval=$(echo
"$j" | cut -d "," -f 8)
if [ $tfval =
"true" ]
then
echo
"$eno \t $enm \t\t $eadd \t\t $eage \t $egen \t $edes \t $ebal"
fi
done
echo "__________________________________________________"
}
Search()
{
clear
echo "Enter Employee NO:
\c"
read no
echo "__________________________________________________"
echo " Employee Details "
echo "__________________________________________________"
flag=0
for j in `cat Employee.txt`
do
eno=$(echo
"$j" | cut -d "," -f 1)
enm=$(echo
"$j" | cut -d "," -f 2)
eadd=$(echo
"$j" | cut -d "," -f 3)
eage=$(echo
"$j" | cut -d "," -f 4)
egen=$(echo
"$j" | cut -d "," -f 5)
edes=$(echo
"$j" | cut -d "," -f 6)
ebal=$(echo
"$j" | cut -d "," -f 7)
tfval=$(echo
"$j" | cut -d "," -f 8)
if [ $no -eq $eno ]
&& [ $tfval = "true" ]
then
flag=1
echo "________________________________________"
echo "________________________________________"
echo
" ENo : $eno EName : $enm "
echo "________________________________________"
echo
" EAdd : $eadd "
echo
" EAge : $eage "
echo " EGen : $egen "
echo "________________________________________"
echo
" EDes : $edes "
echo "________________________________________"
echo
" ESal : $ebal "
echo "________________________________________"
fi
done
if [ $flag = 0 ]
then
echo " No
Record Found "
fi
echo "__________________________________________________"
}
Delete()
{
clear
f=0
echo "Enter Employee NO:
\c"
read no
for j in `cat Employee.txt`
do
eno=$(echo
"$j" | cut -d "," -f 1)
enm=$(echo
"$j" | cut -d "," -f 2)
eadd=$(echo
"$j" | cut -d "," -f 3)
eage=$(echo
"$j" | cut -d "," -f 4)
egen=$(echo
"$j" | cut -d "," -f 5)
edes=$(echo
"$j" | cut -d "," -f 6)
ebal=$(echo
"$j" | cut -d "," -f 7)
if [ $no -eq $eno ]
then
f=1
line=$(echo
"$eno,$enm,$eadd,$eage,$egen,$edes,$ebal,false")
fnm=`cat
Employee.txt`
d=$(echo
"$fnm" | sed s/$j/$line/g )
echo $d >
Employee.txt
echo
" Delete Successfully "
fi
done
if [ f = 0 ]
then
echo " No Record Found "
fi
}
Update()
{
clear
echo "Enter Employee NO:
\c"
read no
for j in `cat Employee.txt`
do
eno=$(echo
"$j" | cut -d "," -f 1)
enm=$(echo
"$j" | cut -d "," -f 2)
eadd=$(echo
"$j" | cut -d "," -f 3)
eage=$(echo
"$j" | cut -d "," -f 4)
egen=$(echo
"$j" | cut -d "," -f 5)
edes=$(echo
"$j" | cut -d "," -f 6)
ebal=$(echo
"$j" | cut -d "," -f 7)
if [ $no -eq $eno ]
then
echo
"______________Enter New Record______________"
echo
"Enter Employee No: $eno"
echo
"Enter Employee Name: \c"
read enm
echo
"Enter Employee Address: \c"
read eadd
echo
"Enter Employee Age : \c"
read eage
echo
"Enter Employee Gender: \c"
read egen
echo
"Enter Employee Designation : \c"
read edes
echo
"Enter Employee Basic Salary : \c"
read ebal
line=$(echo
"$eno,$enm,$eadd,$eage,$egen,$edes,$ebal,true")
#line=$(echo
"$eno,$snm,$m1,$m2,$m3,$total,$per,true")
fnm=`cat
Employee.txt`
d=$(echo
"$fnm" | sed s/$j/$line/g )
echo $d >
Employee.txt
echo
" Update
Sucessfully
"
fi
done
}
while
[ true ]
do
echo " _______________________________"
echo
" 1. Insert "
echo
" 2. Delete "
echo
" 3. Update "
echo
" 4. Display "
echo
" 5. Search "
echo
" 6. Exit "
echo
"Enter Choice: \c"
read
ch
case
$ch in
1)
nxtSrNo=$(AutoNumber)
Insert $nxtSrNo
;;
2) Delete ;;
3) Update ;;
4) Display ;;
5) Search ;;
6) break;;
*) echo " Wrong Choice "
esac
done
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