RedHatVN Network » grep http://redhatvn.net Shared Linux problems Tue, 07 Sep 2010 08:08:35 +0000 en hourly 1 http://wordpress.org/?v=3.0.1 Search Multiple Words / String Pattern Using grep Command http://redhatvn.net/search-multiple-words-string-pattern-using-grep-command http://redhatvn.net/search-multiple-words-string-pattern-using-grep-command#comments Thu, 27 Aug 2009 09:05:51 +0000 admin http://redhatvn.net/?p=257 Q. How do I search multiple string using grep command? For example I’d like to search word1, word2, word3 and so on within /path/to/file. How do I force grep to search multiple words?

A. grep command supports regular expression pattern

Grep command example

To search multiple words, use following syntax:
grep ‘word1|word2|word3‘ /path/to/file

For example, search warning, error, and critical words in a text log file called /var/log/messages, enter:
$ grep 'warning|error|critical' /var/log/messages
To just match words, add -w swith:
$ grep -w 'warning|error|critical' /var/log/messages

]]> http://redhatvn.net/search-multiple-words-string-pattern-using-grep-command/feed 0