How to search in commit messages using command line? [duplicate]

This开发者_如何学编程 question already has answers here: Closed 10 years ago.

Possible Duplicate:

How to search through all commits in the repository?

Is there a way to search through commit headers using the command line?

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git log --grep=<pattern>
    Limit the commits output to ones with log message that matches the 
    specified pattern (regular expression).

from git help log.

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git log --oneline | grep PATTERN