Amit Agarwal

05 Jan Linux, bash by: Amit Agarwal  Tags: awk, Command-line interface, Languages, Pattern matching, perl, programming, regular expression

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Display the output of a command from the first line until the first instance of a regular expression.

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| perl -n -e 'print "$_" if 1 ... /<regex>/;# This command line will display the output of , from the first line of output, until the first time it sees a pattern matching .

You could specify the regex pattern /^$/ to look for the first blank line,

or /^foobar/ to look for the first line that starts with the word foobar.

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by David Winterbottom (codeinthehole.com)

URL: http://feedproxy.google.com/~r/Command-line-fu/~3/Ie99mgx_Pfw/display-the-output-of-a-command-from-the-first-line-until-the-first-instance-of-a-regular-expression.

There are couple of other ways you can do so, like using sed, awk.

<command> |sed –quiet ‘/svn_/,$ !p’

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Display the output of a command from the first line until the first instance of a regular expression.

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Display the output of a command from the first line until the first instance of a regular expression.

1 Comment »

1. 

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   Comment by Google Caffeine — 07/14/2010 @ 18:43

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