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<HTML>
<HEAD>
<!-- This HTML file has been created by texi2html 1.54
from ../texi/sed.texi on 28 October 1999 -->
<TITLE>sed, a stream editor - Introduction</TITLE>
<link href="sed_2.html" rel=Next>
<link href="sed_toc.html" rel=ToC>
</HEAD>
<BODY>
<p>Go to the first, previous, <A HREF="sed_2.html">next</A>, <A HREF="sed_9.html">last</A> section, <A HREF="sed_toc.html">table of contents</A>.
<P><HR><P>
<H1><A NAME="SEC1" HREF="sed_toc.html#TOC1">Introduction</A></H1>
<P>
<A NAME="IDX1"></A>
SED is a stream editor.
A stream editor is used to perform basic text
transformations on an input stream
(a file or input from a pipeline).
While in some ways similar to an editor which
permits scripted edits (such as ED),
SED works by making only one pass over the
input(s), and is consequently more efficient.
But it is SED's ability to filter text in a pipeline
which particularly distinguishes it from other types of
editors.
</P>
<P><HR><P>
<p>Go to the first, previous, <A HREF="sed_2.html">next</A>, <A HREF="sed_9.html">last</A> section, <A HREF="sed_toc.html">table of contents</A>.
</BODY>
</HTML>