Script for making use of multiple options of grep command

vi grep and press enter
.

echo "Enter the database"
read a
echo
echo database is:-
cat $a
echo
echo "Search given patterns from database"
echo enter the salary
read s1
grep $s1 $a
echo
echo search those pattern in which age 22:-
grep -n 22 $a
echo
echo Do not display those pattern having age 22:-
grep -v 22 $a
echo
echo Searching multiple pattern of salary 23000 and name start with m:-
grep -e m -e 23000 $a
echo
echo Showing the use of character class:-
grep "[Mn]eenu" $a
echo
echo show the use of ^ to specify the pattern location
grep "^n" $a


~
~
Output:-
sh grep and press enter
Enter the database
Database

database is:-
|Name |Age |salary |contact no.
|Meenu |23 |40000 |7206297384
|jyoti |20 |35000 |9813456782
|mamta |21 |32000 |9017720166
|kavita |22 |30000 |9014445623
|neha |23 |34500 |8014465777
|sanchi |24 |23000 |9014356278
|nishtha |25 |24567 |7289786254
|mohina |19 |45000 |9824568753
|mohit |22 |43000 |7013442455
|pooja |21 |34590 |9013324658
|monika |34 |23000 |7823445678
|neenu |33 |34000 |8076543210

Search given patterns from database
enter the salary
3000
|sanchi |24 |23000 |9014356278
|monika |34 |23000 |7823445678

search those pattern in which age 22:-
5: |kavita |22 |30000 |9014445623
10:|mohit |22 |43000 |7013442455

Do not display those pattern having age 22:-
|Name |Age |salary |contact no.
|Meenu |23 |40000 |7206297384
|jyoti |20 |35000 |9813456782
|mamta |21 |32000 |9017720166
|neha |23 |34500 |8014465777
|sanchi |24 |23000 |9014356278
|nishtha |25 |24567 |7289786254
|mohina |19 |45000 |9824568753
|pooja |21 |34590 |9013324658
|monika |34 |23000 |7823445678
|neenu |33 |34000 |8076543210

Searching multiple pattern of salary 23000 and name start with m:-
|Name |Age |salary |contact no.
|mamta |21 |32000 |9017720166
|sanchi |24 |23000 |9014356278
|mohina |19 |45000 |9824568753
|mohit |22 |43000 |7013442455
|monika |34 |23000 |7823445678

Showing the use of character class:-
|Meenu |23 |40000 |7206297384
|neenu |33 |34000 |8076543210

show the use of ^ to specify the pattern location
|neha |23 |34500 |8014465777
|nishtha |25 |24567 |7289786254
|neenu |33 |34000 |8076543210