Grepping text by providing line numbers.

anushree.a · #1 (**permalink**) 06-22-2009

Dear Friends,
I have a flat file from which I want to grep line no. 7,10, 19 to 35, 37.
How can it be done?

Thank you in advance
Anushree

scottn · #2 (**permalink**) 06-22-2009

Hi.

When you say "grep lines", do you mean extract lines?

There are a number of tools that can do this.

But based on what you asked, this should work...

sed "7p;10p;19,35p;37p;d" my_file | grep "....."

radoulov · #3 (**permalink**) 06-22-2009

Use gawk, nawk or /usr/xpg4/bin/awk on Solaris:

Code:

awk 'NR~/^7|1[09]|2[0-9]|3[0-5,7]$/' infile

durden_tyler · #4 (**permalink**) 06-22-2009

One way to do it in perl:

Code:

perl -ne 'BEGIN{foreach $i (7,10,(19..35),37){$x{$i}=1}}{print if $x{$.}==1}' infile

tyler_durden

radoulov · #5 (**permalink**) 06-22-2009

Quote:

Originally Posted by durden_tyler

One way to do it in perl:
[...]

Code:

(19..35)...

I have to read more carefully,
I corrected my post.

Using the same logic with Perl:

Code:

perl -ne'$.=~/^7|1[09]|2[0-9]|3[0-5,7]$/and print' infile

ghostdog74 · #6 (**permalink**) 06-22-2009

Code:

awk 'NR ~ /^(7|10|19)$/' file

anushree.a · #7 (**permalink**) 07-01-2009

Hey friends
Almost all solutions worked fine
Thank you for the quick reply.
Take care.

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