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authorJacob McDonnell <jacob@jacobmcdonnell.com>2026-04-25 19:55:15 -0400
committerJacob McDonnell <jacob@jacobmcdonnell.com>2026-04-25 19:55:15 -0400
commit253e67c8b3a72b3a4757fdbc5845297628db0a4a (patch)
treeadf53b66087aa30dfbf8bf391a1dadb044c3bf4d /static/netbsd/man1/crontab.1
parenta9157ce950dfe2fc30795d43b9d79b9d1bffc48b (diff)
docs: Added All NetBSD Manuals
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+.\" $NetBSD: crontab.1,v 1.6 2024/10/29 22:22:09 kre Exp $
+.\"
+.\"/* Copyright 1988,1990,1993 by Paul Vixie
+.\" * All rights reserved
+.\" */
+.\"
+.\" Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
+.\" Copyright (c) 1997,2000 by Internet Software Consortium, Inc.
+.\"
+.\" Permission to use, copy, modify, and distribute this software for any
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
+.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
+.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+.\" OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\"
+.\" Id: crontab.1,v 1.7 2004/01/23 19:03:32 vixie Exp
+.\"
+.Dd May 6, 2010
+.Dt CRONTAB 1
+.Os
+.Sh NAME
+.Nm crontab
+.Nd maintain crontab files for individual users (ISC Cron V4.1)
+.Sh SYNOPSIS
+.Nm
+.Oo Fl u Ar user Oc Ar file
+.Nm
+.Oo Fl elr Oc Oo Fl u Ar user Oc
+.Sh DESCRIPTION
+.Nm
+is the program used to install, deinstall, or list the tables
+used to drive the
+.Xr cron 8
+daemon in ISC Cron.
+Each user can have their own crontab, and though
+these are files in
+.Pa /var/cron ,
+they are not intended to be edited directly.
+.Pp
+If the
+.Pa /var/cron/allow
+file exists, then you must be listed therein in order to be allowed to use
+this command.
+If the
+.Pa /var/cron/allow
+file does not exist but the
+.Pa /var/cron/deny
+file does exist, then you must not be listed in the
+.Pa /var/cron/deny
+file in order to use this command.
+If neither of these files exists, depending on the compiled in settings,
+only the super user will be allowed to use this command,
+or everyone will be allowed to use this command.
+On
+.Nx
+everyone is allowed to use this command.
+.Pp
+The default maximum size for a crontab is 256 kilobytes, but this may be
+changed for all users on the system by putting the desired maximum size
+(in bytes) in the
+.Pa /var/cron/maxtabsize
+file.
+.Pp
+If the
+.Fl u
+option is given,
+which is allowed only for privileged users,
+it specifies the name of the user whose crontab is to be
+tweaked.
+If this option is not given,
+.Nm
+examines
+.Dq your
+crontab, i.e., the crontab of the person executing the command.
+Note that
+.Xr su 1
+can confuse
+.Nm
+and that if you are running inside of
+.Xr su 1
+you should always use the
+.Fl u
+option for safety's sake.
+.Pp
+The first form of this command is used to install a new crontab from some
+named
+.Ar file
+or standard input if the pseudo-filename
+.Dq -
+is given.
+.Pp
+The
+.Fl l
+option causes the current crontab to be displayed on standard output.
+.Pp
+The
+.Fl r
+option causes the current crontab to be removed.
+.Pp
+The
+.Fl e
+option is used to edit the current crontab using the editor specified by
+the
+.Dv VISUAL
+or
+.Dv EDITOR
+environment variables.
+After you exit from the editor, the modified crontab will be installed
+automatically.
+.Sh FILES
+.Bl -tag -width /var/cron/maxtabsize -compact
+.It Pa /var/cron/allow
+Optional list of users that are allowed to use
+.Nm .
+.It Pa /var/cron/deny
+Optional list of users that are disallowed to use
+.Nm .
+.It Pa /var/cron/maxtabsize
+Maximum size of
+.Nm
+files.
+Defaults to
+.Dv 256
+kilobytes.
+.It Pa /var/cron/tabs/
+Directory containing the individual user crontab files, named after the user.
+.El
+.Sh DIAGNOSTICS
+A fairly informative usage message appears if you run it with a bad command
+line.
+.Sh SEE ALSO
+.Xr crontab 5 ,
+.Xr cron 8
+.Sh STANDARDS
+The
+.Nm
+command conforms to
+.St -p1003.2 ,
+except that using
+.Dq \&-
+as
+.Ar file
+is required, for safety reasons, to use standard input to replace the
+current crontab.
+This new command syntax
+differs from previous versions of Vixie Cron, as well as from the classic
+.At v3
+syntax.
+.Sh AUTHORS
+.An Paul Vixie
+.Aq vixie@isc.org