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Full Discussion: Using awk or sed to find a pattern that has lines before and after it
Top Forums Shell Programming and Scripting Using awk or sed to find a pattern that has lines before and after it Post 302974197 by Aia on Thursday 26th of May 2016 01:21:30 PM
Old 05-26-2016
Quote:
Originally Posted by ran_bon_78
I have a few thousand lines file whose contain are mostly as below and I am trying to achieve followings.
1. Find a string, say user1. Then hash the line containing the string along with 2 lines before and 1 line after.
2. The script should not hast other lines like user10,11,12 etc.

[...]
Code:
perl -ne 'BEGIN{$/="}\n"} /user1$/m and print' example.data

Output:
Code:
        start {
                UID 5001
                NAME  user1
                }

Substitute the red for any other you want. If you want several users like user1 and user4, change to /user(1|4)$/m

It works also with UID as well:

Code:
perl -ne 'BEGIN{$/="}\n"} /5002$/m and print' example.data

Output:
Code:
        start {
                UID 5002
                NAME  user2
                }

Last edited by Aia; 05-26-2016 at 02:37 PM.. Reason: Add UID example
 

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