602 lines
8.7 KiB
HTML
602 lines
8.7 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
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<HTML
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><HEAD
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><TITLE
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>About fcron</TITLE
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
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REL="HOME"
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TITLE="Fcron: how and why?"
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HREF="how-and-why.html"><LINK
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REL="PREVIOUS"
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TITLE="Fcron: how and why?"
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HREF="how-and-why.html"><LINK
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REL="NEXT"
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TITLE="How to install fcron"
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HREF="install.html"></HEAD
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><TR
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><TD
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WIDTH="40%"
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ALIGN="left"
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VALIGN="top"
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><A
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HREF="LEGALNOTICE.html"
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>Copyright</A
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> © 2000-2014 <A
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HREF="mailto:fcron@free.fr"
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>Thibault Godouet</A
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></TD
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><TD
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WIDTH="20%"
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ALIGN="center"
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VALIGN="top"
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>Fcron 3.2.0 </TD
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><TD
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WIDTH="40%"
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ALIGN="right"
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VALIGN="top"
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>Web page : <A
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HREF="http://fcron.free.fr"
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>http://fcron.free.fr</A
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></TD
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></TR
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></TABLE
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><HR
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ALIGN="LEFT"
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SUMMARY="Header navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLSPACING="0"
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>Fcron documentation</TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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VALIGN="bottom"
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><A
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HREF="how-and-why.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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>Chapter 1. Fcron: how and why?</TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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><A
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HREF="install.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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></TABLE
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><HR
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><DIV
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CLASS="SECT1"
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><H1
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CLASS="SECT1"
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><A
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NAME="README"
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>1.1. About fcron</A
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></H1
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="AEN37"
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>1.1.1. What is fcron?</A
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></H2
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><P
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><SPAN
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CLASS="APPLICATION"
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>Fcron</SPAN
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> is a scheduler. It aims at replacing <SPAN
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CLASS="APPLICATION"
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>Vixie
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Cron</SPAN
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>, so it implements most of its functionalities.</P
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><P
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>But contrary to <SPAN
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CLASS="APPLICATION"
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>Vixie Cron</SPAN
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>, <SPAN
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CLASS="APPLICATION"
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>fcron</SPAN
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>
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does not need your system to be up 7 days a week, 24 hours a day: it also works
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well with systems which are not running neither all the time nor regularly
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(contrary to <SPAN
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CLASS="APPLICATION"
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>anacrontab</SPAN
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>).</P
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><P
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>In other words, <SPAN
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CLASS="APPLICATION"
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>fcron</SPAN
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> does both the job of <SPAN
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CLASS="APPLICATION"
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>Vixie
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Cron</SPAN
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> and <SPAN
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CLASS="APPLICATION"
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>anacron</SPAN
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>, but does even more
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and better :)) ...</P
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><P
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>To do so, <SPAN
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CLASS="APPLICATION"
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>fcron</SPAN
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> allows you to use the standard mode in which you
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tell it to execute one command at a given date and hour and to make it run a
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command according to its time of execution, which is normally the same as system
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up time. For example:
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<A
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NAME="AEN52"
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></A
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><BLOCKQUOTE
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CLASS="BLOCKQUOTE"
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><P
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>Run the task 'save /home/ directory' every 3h15 of system
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up time.</P
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></BLOCKQUOTE
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> and, of course, in order to make it really useful, the
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time remaining until next execution is saved each time the system is stopped.
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You can also say:
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<A
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NAME="AEN54"
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></A
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><BLOCKQUOTE
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CLASS="BLOCKQUOTE"
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><P
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>run that command once between 2am and 5am</P
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></BLOCKQUOTE
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> which will be done if the system is running at any
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time in this interval.</P
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><P
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><SPAN
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CLASS="APPLICATION"
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>Fcron</SPAN
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> also includes a useful system of options, which can be
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applied either to every lines following the declaration or to a single line.
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Some of the supported options permit to:
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<P
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></P
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><UL
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><LI
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><P
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>run jobs one by one (fcrontab option
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<A
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HREF="fcrontab.5.html#FCRONTAB.5.SERIAL"
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><CODE
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CLASS="VARNAME"
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>serial</CODE
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></A
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>),</P
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></LI
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><LI
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><P
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>set the max system load average value under
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which the job should be run (fcrontab option <A
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HREF="fcrontab.5.html#FCRONTAB.5.LAVG"
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><CODE
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CLASS="VARNAME"
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>lavg</CODE
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></A
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>),</P
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></LI
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><LI
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><P
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>set a nice value for a job (fcrontab option
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<A
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HREF="fcrontab.5.html#FCRONTAB.5.NICE"
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><CODE
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CLASS="VARNAME"
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>nice</CODE
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></A
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>),</P
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></LI
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><LI
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><P
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>run jobs at <SPAN
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CLASS="APPLICATION"
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>fcron</SPAN
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>'s startup if they should
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have been run during system down time (fcrontab option
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<A
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HREF="fcrontab.5.html#FCRONTAB.5.BOOTRUN"
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><CODE
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CLASS="VARNAME"
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>bootrun</CODE
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></A
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>),</P
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></LI
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><LI
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><P
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>mail user to tell him a job has not run and why
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(fcrontab option <A
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HREF="fcrontab.5.html#FCRONTAB.5.NOTICENOTRUN"
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><CODE
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CLASS="VARNAME"
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>noticenotrun</CODE
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></A
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>),</P
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></LI
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><LI
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><P
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>a better management of the mailing of outputs
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...</P
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></LI
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></UL
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>
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</P
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></DIV
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="AEN82"
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>1.1.2. License</A
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></H2
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><P
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><SPAN
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CLASS="APPLICATION"
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>Fcron</SPAN
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> is distributed under GPL license (please read the license
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in the <A
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HREF="gpl.html"
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>gpl</A
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> file).</P
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></DIV
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="AEN87"
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>1.1.3. Requirements</A
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></H2
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><P
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></P
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><UL
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><LI
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><P
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>a <SPAN
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CLASS="PRODUCTNAME"
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>Linux/Unix system</SPAN
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></P
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><P
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><SPAN
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CLASS="APPLICATION"
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>Fcron</SPAN
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> should work on every
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<SPAN
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CLASS="PRODUCTNAME"
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>POSIX</SPAN
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> system, but it has been developed on
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<SPAN
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CLASS="PRODUCTNAME"
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>Mandrake</SPAN
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> Linux (so it should work without any
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problems on <SPAN
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CLASS="PRODUCTNAME"
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>Redhat</SPAN
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>).</P
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><P
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>Fcron has been reported to work correctly on:
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</P
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><P
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></P
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><UL
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><LI
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><P
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><SPAN
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CLASS="PRODUCTNAME"
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>Linux Mandrake</SPAN
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>
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</P
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></LI
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><LI
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><P
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><SPAN
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CLASS="PRODUCTNAME"
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>Linux Debian 3.0</SPAN
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>
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</P
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></LI
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><LI
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><P
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><SPAN
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CLASS="PRODUCTNAME"
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>LFS</SPAN
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></P
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><P
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>(take a look at the <A
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HREF="http://www.linuxfromscratch.org/blfs/"
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TARGET="_top"
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>Beyond
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LFS book</A
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> to find the installation
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informations).</P
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></LI
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><LI
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><P
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><SPAN
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CLASS="PRODUCTNAME"
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>FreeBSD 4.2</SPAN
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>
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</P
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></LI
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><LI
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><P
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><SPAN
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CLASS="PRODUCTNAME"
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>OpenBSD 2.8</SPAN
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>
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</P
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></LI
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><LI
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><P
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><SPAN
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CLASS="PRODUCTNAME"
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>NetBSD 2.0</SPAN
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>
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</P
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></LI
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><LI
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><P
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><SPAN
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CLASS="PRODUCTNAME"
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>Darwin/MacOS-X</SPAN
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></P
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></LI
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><LI
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><P
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><SPAN
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CLASS="PRODUCTNAME"
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>Solaris 8</SPAN
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>
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</P
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></LI
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><LI
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><P
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><SPAN
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CLASS="PRODUCTNAME"
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>AIX 4.3.3</SPAN
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>
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</P
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></LI
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><LI
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><P
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><SPAN
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CLASS="PRODUCTNAME"
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>HP-UX 11.11</SPAN
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>
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</P
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></LI
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></UL
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><P
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>but fcron should work on other OS as well. Yet,
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if you have troubles
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making it work on a <SPAN
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CLASS="PRODUCTNAME"
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>POSIX</SPAN
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> system, please
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contact me at <CODE
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CLASS="EMAIL"
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><<A
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HREF="mailto:fcron@free.fr"
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>fcron@free.fr</A
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>></CODE
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>.</P
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></LI
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><LI
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><P
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>a running <SPAN
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CLASS="APPLICATION"
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>syslog</SPAN
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> (or you
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won't have any log)</P
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></LI
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><LI
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><P
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>a running mail system (
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<SPAN
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CLASS="APPLICATION"
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>sendmail</SPAN
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> or <SPAN
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CLASS="APPLICATION"
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>postfix</SPAN
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> for
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example) (or users will not able to read their jobs output)
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</P
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></LI
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><LI
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><P
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>(optional) a <SPAN
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CLASS="PRODUCTNAME"
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>PAM</SPAN
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>
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library.</P
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></LI
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><LI
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><P
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>(optional) a system with a working <SPAN
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CLASS="PRODUCTNAME"
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>SE Linux</SPAN
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> environment.</P
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></LI
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></UL
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></DIV
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="AEN148"
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>1.1.4. Compilation and installation</A
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></H2
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><P
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>See the <A
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HREF="install.html"
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>install</A
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> file (either install.txt
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or install.html).</P
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></DIV
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="AEN152"
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>1.1.5. Configuration</A
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></H2
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><P
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>See the <A
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HREF="fcron.8.html"
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><SPAN
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CLASS="APPLICATION"
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>fcron</SPAN
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>(8)</A
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>, <A
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HREF="fcrontab.5.html"
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><SPAN
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CLASS="APPLICATION"
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>fcrontab</SPAN
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>(5)</A
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> and <A
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HREF="fcrontab.1.html"
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><SPAN
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CLASS="APPLICATION"
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>fcrontab</SPAN
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>(1)</A
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> manpages.</P
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></DIV
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="AEN161"
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>1.1.6. Bug reports, corrections, propositions...</A
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></H2
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><P
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>Please send me the description of any bug you happen to encounter
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(with, even better, the corresponding patch -:) and any propositions,
|
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congratulations or flames at <CODE
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CLASS="EMAIL"
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><<A
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HREF="mailto:fcron@free.fr"
|
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>fcron@free.fr</A
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>></CODE
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></P
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><P
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>Please contact Russell Coker directly for problems about SE Linux support at <CODE
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CLASS="EMAIL"
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><<A
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HREF="mailto:russell@coker.com.au"
|
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>russell@coker.com.au</A
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>></CODE
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>, since he maintains this part of the code.</P
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></DIV
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></DIV
|
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><DIV
|
|
CLASS="NAVFOOTER"
|
|
><HR
|
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ALIGN="LEFT"
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WIDTH="100%"><TABLE
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SUMMARY="Footer navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
|
|
VALIGN="top"
|
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><A
|
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HREF="how-and-why.html"
|
|
ACCESSKEY="P"
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|
>Prev</A
|
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></TD
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><TD
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WIDTH="34%"
|
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ALIGN="center"
|
|
VALIGN="top"
|
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><A
|
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HREF="index.html"
|
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ACCESSKEY="H"
|
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>Home</A
|
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></TD
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><TD
|
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WIDTH="33%"
|
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ALIGN="right"
|
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VALIGN="top"
|
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><A
|
|
HREF="install.html"
|
|
ACCESSKEY="N"
|
|
>Next</A
|
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></TD
|
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></TR
|
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><TR
|
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><TD
|
|
WIDTH="33%"
|
|
ALIGN="left"
|
|
VALIGN="top"
|
|
>Fcron: how and why?</TD
|
|
><TD
|
|
WIDTH="34%"
|
|
ALIGN="center"
|
|
VALIGN="top"
|
|
><A
|
|
HREF="how-and-why.html"
|
|
ACCESSKEY="U"
|
|
>Up</A
|
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></TD
|
|
><TD
|
|
WIDTH="33%"
|
|
ALIGN="right"
|
|
VALIGN="top"
|
|
>How to install fcron</TD
|
|
></TR
|
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></TABLE
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></DIV
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></BODY
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></HTML
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> |