====== Grep ======

**grep**, Global Regular Expression Print, will search input files for a search string, and print the lines that match it.

Beginning at the first line in the file, grep copies a line into a buffer, compares it against the search string, and if the comparison passes, prints the line to the screen.

Grep will repeat this process until the file runs out of lines.

<WRAP info>
**NOTE:**  Nowhere in this process does grep store lines, change lines, or search only a part of a line.
</WRAP>

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[[Grep:Basic usage|Basic usage]]

[[Grep:Regex usage|Regex usage]]