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<!DOCTYPE html>
<html>
<head>
<title>CRONTAB(1)</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" >
</head>
<body>
<pre>
CRONTAB(1) CRONTAB(1)
<b>NAME</b>
crontab - maintain crontab files for individual users (V3)
<b>SYNOPSIS</b>
crontab [ -u user ] file
crontab [ -u user ] { -l | -r | -e }
<b>DESCRIPTION</b>
<i>Crontab</i> is the program used to install, deinstall or list
the tables used to drive the <i>cron</i>(8) daemon in Vixie Cron.
Each user can have their own crontab, and though these are
files in /var, they are not intended to be edited
directly.
If the <i>allow</i> file exists, then you must be listed therein
in order to be allowed to use this command. If the <i>allow</i>
file does not exist but the <i>deny</i> file does exist, then you
must <b>not</b> be listed in the <i>deny</i> file in order to use this
command. If neither of these files exists, then depending
on site-dependent configuration parameters, only the super
user will be allowed to use this command, or all users
will be able to use this command.
If the <i>-u</i> option is given, it specifies the name of the
user whose crontab is to be tweaked. If this option is
not given, <i>crontab</i> examines "your" crontab, i.e., the
crontab of the person executing the command. Note that
<i>su</i>(8) can confuse <i>crontab</i> and that if you are running
inside of <i>su</i>(8) you should always use the <i>-u</i> option for
safety's sake.
The first form of this command is used to install a new
crontab from some named file or standard input if the
pseudo-filename ``-'' is given.
The <i>-l</i> option causes the current crontab to be displayed
on standard output.
The <i>-r</i> option causes the current crontab to be removed.
The <i>-e</i> option is used to edit the current crontab using
the editor specified by the VISUAL or EDITOR environment
variables. After you exit from the editor, the modified
crontab will be installed automatically.
<b>SEE</b> <b>ALSO</b>
<a href="/">crontab(5)</a>, <a href="/cron.8.html">cron(8)</a>
<b>FILES</b>
/etc/cron.allow
/etc/cron.deny
<b>STANDARDS</b>
The <i>crontab</i> command conforms to IEEE Std1003.2-1992
(``POSIX''). This new command syntax differs from previ-
ous versions of Vixie Cron, as well as from the classic
SVR3 syntax.
<b>DIAGNOSTICS</b>
A fairly informative usage message appears if you run it
with a bad command line.
<b>AUTHOR</b>
Paul Vixie <[email protected]>
29 December 1993 1
--
crontab.org is maintained by <a href="http://ilya.sukhar.com">Ilya Sukhar</a>
</pre>
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