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<title>GNU sed - GNU Project - Free Software Foundation</title> |
<title>GNU sed - GNU Project - Free Software Foundation</title> |
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<h2>GNU sed</h2> |
<h2>GNU sed</h2> |
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<p> |
<p> |
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sed (stream editor) isn't an interactive text editor. |
sed (stream editor) is a non-interactive command-line text editor. |
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Instead, it is used to filter text, i.e., it takes text input, performs |
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some operation (or set of operations) on it, and outputs the modified text. |
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sed is typically used for extracting part of a file using pattern matching |
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or substituting multiple occurrences of a string within a file. |
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</p> |
</p> |
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<pre class="example"> |
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# Example: delete the 4th line in a file |
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$ sed '4d' input.txt > output.txt |
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# Example: replace all occurances of 'hello' with 'world' on lines 10-20 |
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$ sed '10,20s/hello/world/' input.txt > output.txt |
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</pre> |
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<p> |
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sed is commonly used to filter text, i.e., it takes text |
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input, performs some operation (or set of operations) on it, and |
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outputs the modified text. sed is typically used for extracting |
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part of a file using pattern matching or substituting multiple |
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occurrences of a string within a file. |
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</p> |
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<h3><a name="help">Getting Help</a></h3> |
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<ul style="margin-top:0;"> |
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<!-- SED Manual --> |
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<li> |
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Read the manual locally using <samp>info sed</samp> or see the latest |
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<a href="manual/">online manual</a> |
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</li> |
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<!-- Search Mailing lists --> |
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<li>Search the archives for previous questions and answers: |
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<ul style="margin-top:0; margin-bottom:0;"> |
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<li>Questions, Development, and General Discussion: |
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<a href="http://lists.gnu.org/archive/html/sed-devel/"> |
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sed-devel Mailing list |
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</a> |
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</li> |
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<li>Bug reports: |
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<a href="http://lists.gnu.org/archive/html/bug-sed/"> |
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bug-sed Mailing List |
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</a> |
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</li> |
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</ul> |
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</li> |
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<!-- http://sed.sf.net --> |
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<li>General SED resources are available at |
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<a href="http://sed.sf.net">http://sed.sf.net</a>, including: |
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<ul style="margin-top:0;margin-bottom:0;"> |
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<li> |
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<a href="http://sed.sourceforge.net/#docs"> |
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Documentations, FAQ, one-liners</a> |
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</li> |
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<li> |
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<a href="http://sed.sourceforge.net/#books"> |
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Books</a> |
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</li> |
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<li> |
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<a href="http://sed.sourceforge.net/#scripts"> |
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Example scripts<a/> |
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</li> |
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</ul> |
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</li> |
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<!-- http://translationproject.org/domain/sed.html --> |
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<li> |
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Send translation requests to the language team linked from: |
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<a href="http://translationproject.org/domain/sed.html"> |
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http://translationproject.org/domain/sed.html |
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</a> |
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</li> |
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<!-- sed-devel@gnu.org for GENERAL QUESTIONS --> |
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<li> |
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Send general questions or suggestions to the mailing list at: |
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<a href="mailto:sed-devel@gnu.org">sed-devel@gnu.org</a> |
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</li> |
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<!-- bug-sed@gnu.org for BUG REPORTS --> |
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<li> |
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Report bugs, including version and distribution variant, to the list at: |
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<a href="mailto:bug-sed@gnu.org">bug-sed@gnu.org</a><br/> Before |
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sending the bug, please consult the FAQ and Mailing list archives |
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(above).<br/> Often these perceived bugs are simply due to wrong |
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program usage.<br/> To learn more about reporting bugs, |
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see <a href="/help/gethelp.html">Getting help with GNU software</a> |
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</li> |
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</ul> |
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<h3 id="download">Downloads</h3> |
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<p> |
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Stable source releases can be found at |
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<a href="http://ftp.gnu.org/gnu/sed/">http://ftp.gnu.org/gnu/sed/</a> |
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<a href="ftp://ftp.gnu.org/gnu/sed/">(FTP)</a> |
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<a href="/order/ftp.html">(local mirrors)</a><br/> |
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Test source releases can be found at |
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<a href="ftp://alpha.gnu.org/gnu/sed/">http://alpha.gnu.org/gnu/sed/</a> |
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</p> |
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<h3 id="source">Latest Source</h3> |
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<p> |
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The latest source with revision history can be browsed using |
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<a href="http://git.sv.gnu.org/cgit/sed.git">cgit</a>, |
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<a href="http://git.sv.gnu.org/gitweb/?p=sed.git">gitweb</a> or |
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Assuming you have <a href="http://git.or.cz/">git</a> installed, you |
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can retrieve the latest version with this command: |
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<samp>git clone git://git.sv.gnu.org/sed</samp><br/> |
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<!-- TODO: add README-hacking to SED |
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To build from the latest sources please follow the instructions in |
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<a href="http://git.savannah.gnu.org/cgit/sed.git/plain/README-hacking">README-hacking</a><br/> |
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--> |
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Please note that we do not suggest using test versions of SED |
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for production use. |
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</p> |
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<!-- TODO: Add SED to all of the websites below |
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<h3 id="testing">Third party testing resources</h3> |
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<p> |
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<ul> |
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<li><a href="http://hydra.nixos.org/jobset/gnu/coreutils-master"> |
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Hydra continuous integration jobs</a></li> |
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<li><a href="https://scan.coverity.com/projects/29?tab=Overview"> |
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Coverity static analysis</a></li> |
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<li><a href="http://www.opencoverage.net/coreutils"> |
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Open coverage test coverage report</a></li> |
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<li><a href="http://hydra.nixos.org/job/gnu/coreutils-master/coverage/latest/log/tail-reload"> |
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Latest Hydra test coverage results</a></li> |
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</ul> |
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</p> |
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--> |
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<h3>Mailing Lists</h3> |
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<p> |
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You do not need to be subscribed in order to post messages to any GNU |
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mailing list. However non-subscribers are moderated by humans so |
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please be patient when waiting for your email to arrive. |
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</p> |
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<p> |
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You can subscribe to any GNU mailing list via the web as described |
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below. Or you can send an empty mail with a Subject: header line of |
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just "subscribe" to the relevant -request list. For example, to |
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subscribe yourself to the main sed-devel list, you would |
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send mail to <a href="mailto:sed-devel-request@gnu.org"> |
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<em>sed-devel-request@gnu.org</em></a> with no body and a Subject: |
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header line of just "subscribe". |
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</p> |
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<p> |
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It has been necessary to moderate the Sed mailing lists to prevent the |
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flood of spam. Postings to the lists are held for release by |
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the list moderator. Sometimes the moderators are unavailable for |
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brief periods of time. Please be patient when posting. If you |
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don't eventually see the message in the list archive then it did not |
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get posted. |
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</p> |
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<h4>Announcements</h4> |
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<p> |
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Important announcements about GNU sed and most other GNU Software are |
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also made on |
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<a href="http://lists.gnu.org/mailman/listinfo/info-gnu"> |
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info-gnu@gnu.org mailing list |
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</a>. |
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</p> |
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<h4>Discussion List</h4> |
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<p> |
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<a href="manual/">Online documentation</a> is available. |
The main discussion list for all things related to GNU sed is |
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<a href="https://lists.gnu.org/mailman/listinfo/sed-devel"><<em>sed-devel@gnu.org</em>></a>. |
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If you have questions, comments, or other general |
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discussion about sed then this is the mailing list for that |
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discussion. If you don't know where to start then this is the place |
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to start. You can browse and search past postings to the |
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<a href="http://lists.gnu.org/archive/html/sed-devel/">sed-devel archive</a>. |
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</p> |
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<h4>Bug Reports</h4> |
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<p> |
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If you think you have found a bug in GNU sed, then please send |
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as complete a bug report as possible to |
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<a href="http://lists.gnu.org/mailman/listinfo/bug-sed"><bug-sed@gnu.org></a>, |
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and it will automatically be entered into the <a href="http://debbugs.gnu.org/sed"> |
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sed bug tracker</a>. |
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<!-- TODO: sed FAQ? |
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Before reporting bugs please read the <a href="faq/coreutils-faq.html">FAQ</a>. |
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--> |
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A very useful and often referenced guide on how to write bug reports |
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and ask good questions is the document |
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<a href="http://www.catb.org/~esr/faqs/smart-questions.html"> |
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How To Ask Questions The Smart Way |
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</a>. |
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You can browse previous postings and search the |
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<a href="http://lists.gnu.org/archive/html/bug-sed/">bug-sed archive</a>. |
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</p> |
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<h4>Enhancement Requests</h4> |
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<p> |
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If you would like any new feature to be included in future versions of |
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sed, please send a request to <a |
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href="http://lists.gnu.org/mailman/listinfo/sed-devel"><sed-devel@gnu.org></a>. |
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This is the general discussion list and a good place to start |
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discussion of a new feature. After consideration you may be asked to |
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log a request into the bug tracker so that the issue is not lost. |
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If you would like to implement yourself, then note that non trivial changes |
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require copyright assignment to the FSF as detailed in the "Copyright Assignment" |
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<!-- TODO: add HACKING to sed --> |
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section of GNU coreutils <a href="http://git.sv.gnu.org/cgit/coreutils.git/plain/HACKING">HACKING</a> notes. |
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</p> |
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<h4>Mailing List Etiquette</h4> |
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<p> |
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Please do not send messages encoded as HTML nor encoded as base64 MIME |
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nor included as multiple formats. |
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Please send messages as |
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<a href="http://stagecraft.theprices.net/nomime.html">plain text</a>. |
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Please include a descriptive subject line. If all of the subjects are |
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<em>bug</em> then it is impossible to differentiate them. |
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Please avoid sending large messages, such as log files, system call |
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trace output, and other content resulting in messages over about 40 kB, |
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to the mailing lists without prior contact. Those are best sent |
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directly to those requesting that information after initial contact. |
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</p> |
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<p> |
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Please remember that development of GNU sed is a volunteer effort, and you |
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can also contribute to its development. For information about contributing |
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to the GNU Project, please read <a href="/help/">How to help GNU</a>. |
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</p> |
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<h3>Maintainers</h3> |
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<p> |
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GNU Sed is currently being maintained by |
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Jim Meyering <a href="mailto:jim@meyering.net"><em>jim@meyering.net</em></a>, |
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and |
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Assaf Gordon <a href="mailto:assafgordon@gmail.com"><em>assafgordon@gmail.com</em></a>. |
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</p> |
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<div id="footer"> |
<div id="footer"> |
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There is more detail about copyright years in the GNU Maintainers |
There is more detail about copyright years in the GNU Maintainers |
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Information document, www.gnu.org/prep/maintain. --> |
Information document, www.gnu.org/prep/maintain. --> |
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<p>Copyright © 2013, 2014 Free Software Foundation, Inc.</p> |
<p>Copyright © 2013, 2014, 2015, 2016 Free Software Foundation, Inc.</p> |
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<p>This page is licensed under a <a rel="license" |
<p>This page is licensed under a <a rel="license" |
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href="http://creativecommons.org/licenses/by-nd/4.0/">Creative |
href="http://creativecommons.org/licenses/by-nd/4.0/">Creative |