Package sed

A GNU stream text editor

http://sed.sourceforge.net/

The sed (Stream EDitor) editor is a stream or batch (non-interactive)
editor. Sed takes text as input, performs an operation or set of
operations on the text and outputs the modified text. The operations
that sed performs (substitutions, deletions, insertions, etc.) can be
specified in a script file or from the command line.

General Commands
Command Description
sed stream editor for filtering and transforming text