Search text from a file and print text and one previous line too

kamranjalal · #1 (**permalink**) 01-02-2009

Hi,

Please let me know how to find text and print text and its previous line. Please don't get irritated few days back I asked text and next line. I am using HP-UX 11.11

Thanks for your help.

Franklin52 · #2 (**permalink**) 01-02-2009

One way:

Code:

awk '/pattern/{print s "\n" $0;exit}{s=$0}' file

Regards

Christoph Spohr · #3 (**permalink**) 01-02-2009

Or:

Code:

grep -B1 pattern file

or:

Code:

sed -n -e '/pattern/{x;p;x;p}' -e h file

Rhije · #4 (**permalink**) 01-02-2009

I have no idea what HP-UX 11.11 is.. but normal *nix shell, you can do:

grep -A2 "sometext" somefile.ext

It would grab that text, and the two lines afterwards.. You can also use -B for before.

kamranjalal · #5 (**permalink**) 01-02-2009

Please "cfajohnson" What should I change in the following command to find text and its previous line.

I got command (text=start; awk '/'"$text"'/{n=2}n-->0' filename) for finding text and next line.

Thanks for your help.

kamranjalal · #6 (**permalink**) 01-05-2009

Hi,

Command awk '/pattern/{print s "\n" $0;exit}{s=$0}' file only returns the first occurance of the pattern, it is not showing the next occurance.

Please help me, thanks

Franklin52 · #7 (**permalink**) 01-06-2009

Remove the exit command:

Code:

awk '/pattern/{print s "\n" $0}{s=$0}' file

Regards

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