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diff --git a/sag-0.6.1-www/Invisible/sag-0.6/node12.html b/sag-0.6.1-www/Invisible/sag-0.6/node12.html new file mode 100644 index 0000000..df1afab --- /dev/null +++ b/sag-0.6.1-www/Invisible/sag-0.6/node12.html @@ -0,0 +1,47 @@ +<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> +<!--Converted with LaTeX2HTML 96.1-h (September 30, 1996) by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds --> +<HTML> +<HEAD> +<TITLE>Periodic command execution: cron and at</TITLE> +<META NAME="description" CONTENT="Periodic command execution: cron and at"> +<META NAME="keywords" CONTENT="sag"> +<META NAME="resource-type" CONTENT="document"> +<META NAME="distribution" CONTENT="global"> +<LINK REL=STYLESHEET HREF="sag.css"> +</HEAD> +<BODY LANG="EN" > + <A NAME="tex2html445" HREF="node13.html"><IMG WIDTH=37 HEIGHT=24 ALIGN=BOTTOM ALT="next" SRC="./next_motif.gif"></A> <A NAME="tex2html443" HREF="node8.html"><IMG WIDTH=26 HEIGHT=24 ALIGN=BOTTOM ALT="up" SRC="./up_motif.gif"></A> <A NAME="tex2html437" HREF="node11.html"><IMG WIDTH=63 HEIGHT=24 ALIGN=BOTTOM ALT="previous" SRC="./previous_motif.gif"></A> <A NAME="tex2html447" HREF="node1.html"><IMG WIDTH=65 HEIGHT=24 ALIGN=BOTTOM ALT="contents" SRC="./contents_motif.gif"></A> <A NAME="tex2html448" HREF="node114.html"><IMG WIDTH=43 HEIGHT=24 ALIGN=BOTTOM ALT="index" SRC="./index_motif.gif"></A> <BR> +<B> Next:</B> <A NAME="tex2html446" HREF="node13.html">Graphical user interface</A> +<B>Up:</B> <A NAME="tex2html444" HREF="node8.html">Major services in a </A> +<B> Previous:</B> <A NAME="tex2html438" HREF="node11.html">Syslog</A> +<BR> <P> +<A NAME="353"> </A><H2><A NAME="SECTION00334000000000000000">Periodic command execution: <tt>cron</tt><A NAME="351"> </A> and <tt>at</tt></A></H2> +<P> + Both users and system administrators often need to run + commands periodically. For example, the system + administrator might want to run a command to clean the + directories with temporary files (<tt>/tmp</tt><A NAME="355"> </A> and <tt>/var/tmp</tt><A NAME="357"> </A>) + from old files, to keep the disks from filling up, since not + all programs clean up after themselves correctly. +<A NAME="287"> </A> +<A NAME="211"> </A> +<A NAME="212"> </A> +<P> + The <tt>cron</tt><A NAME="359"> </A> service is set up to do this. Each user has + a <tt>crontab</tt><A NAME="361"> </A>, where he lists the commands he wants to + execute and the times they should be executed. The <tt>cron</tt><A NAME="363"> </A> + daemon takes care of starting the commands when specified. +<A NAME="288"> </A> +<P> + The <tt>at</tt><A NAME="365"> </A> service is similar to <tt>cron</tt><A NAME="367"> </A>, but it is + once only: the command is executed at the given time, but it + is not repeated. +<A NAME="289"> </A> +<P> +<BR> <HR> +<P><ADDRESS> +<I>Lars Wirzenius <BR> +Sat Nov 15 02:32:11 EET 1997</I> +</ADDRESS> +</BODY> +</HTML> |