CODEWITHSUNDEEP
linuxbashsed
N00b101
N00b101

Reputation: 165

Using sed, how can I delete all instances of a string within a range of lines?

I know that

sed '/match/ d' file

deletes all lines with matches, and

sed '1,3 s/match//g' file

deletes all matches in the first 3 lines.

But how do I delete all lines with matches in first 3 lines?

If possible, give a solution with only one sed call (no piping).

Upvotes: 1

Views: 1242

Answers (3)

Ed Morton
Ed Morton

Reputation: 203674

awk -v string="foo" 'NR<=3 && index($0,string) {next} 1' file

Upvotes: 0

Jotne
Jotne

Reputation: 41456

If you like to test awk, it would be:

awk '/match/ && NR<=3 {next} 1' file

Upvotes: 0

devnull
devnull

Reputation: 123528

You could combine the two:

sed '1,3{/match/d;}' file

This would delete lines containing match in the specified address range, i.e. in lines 1-3 in the example above.

Upvotes: 3

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