Shell Programming and Scripting

Hello all
Need some help in doing this.Im trying to grep particular value(pid=34) from 'n' number of files and change it to different value(pid_num=34).Is there any way we can do it with a single command.Please advise.

Ex:grep pid *.txt
1.txt ;pid=34
2.tx ;pid=34
3.txt ;pid=34
...... n.txt

Now I want to convert the pid=34 to pid_num=34 in all the previously mentioned files (1.txt,2.txt.....n.txt)

o/p:
1.txt ;pid_num=34
2.txt ;pid_num=34
.....n.txt

Thanks
Kev

hmm it may work try

Code:

 
awk '/pid/&&split($0,A,"="){print FILENAME":"A[1]"_num="A[2]}' *.txt

Thanks for the help but no luck...when i run the command it is showing the value beside it but the change is not happening..

o/p:
1.txt ;pid=34 pid_num=34

when i run this "grep pid *.txt" it is still showing as pid instead of pid_num

its working fine for me

Code:

fnsonlu1-/home/fnsonlu1> cat vv
pid=34
fnsonlu1-/home/fnsonlu1> cat vvv
pid=34
fnsonlu1-/home/fnsonlu1>  awk '/pid/&&split($0,A,"="){print FILENAME":"A[1]"_num="A[2]}' vv*
vv:pid_num=34
vvv:pid_num=34

Thank you vidyadhar85 i guess i made a typo..can you also help me with changing "pid" to "sid" in all files please.

Appreciate your help
Kev

Code:

sed 's/pid/sid/g' filename>new_file

if you have -i option

Code:

 
sed -i 's/pid/sid/g' filename

Awesome thank you so much for your help man..it is working now..