Manual page for CRONTAB(1)
crontab - install, edit, remove or list a user's crontab file
SYNOPSIS
crontab
[
filename
]
crontab
-e
[
username
]
crontab
-l
[
username
]
crontab
-r
[
username
]
DESCRIPTION
crontab
copies the specified file,
or the standard input if no file is specified,
into a directory that holds all users'
crontab
files. A user's
crontab
file lists commands that are to be executed on behalf of that user at
specified times on specified dates; the format of these files is
described in
crontab.5
If the file
/var/spool/cron/cron.allow
exists, only users whose username appears in it can use
crontab.
If that file does
not
exist, however,
crontab
checks the
/var/spool/cron/cron.deny
file to determine if the user
should be denied the use of
crontab.
If neither file exists, only the super-user is allowed to
submit a
crontab
job. If
cron.allow
does not exist and
cron.deny
exists and is empty, global usage is permitted.
The allow/deny files consist of one user name
per line.
OPTIONS
- -e
-
Make a copy of the current user's
crontab
file, or create an empty file if it does not exist, and edit
that file. The
vi.1
editor will be used unless the environment variable
VISUAL
or
EDITOR
indicates an alternate editor.
When editing is complete, install the file as the user's
crontab
file if it was modified.
If a
username
is given, the specified user's
crontab
file is edited, rather than the current user's
crontab
file; this may only be done by the super-user.
- -l
-
List the user's
crontab
file.
- -r
-
Remove the current user's
crontab
file from the
crontab
directory.
If a
username
is given, the specified user's
crontab
file is removed, rather than the current user's
crontab
file; this may only be done by the super-user.
FILES
- /var/spool/cron
-
main cron directory
- /var/spool/cron/crontabs
-
spool area
- /var/spool/cron/cron.allow
-
list of allowed users
- /var/spool/cron/cron.deny
-
list of denied users
SEE ALSO
sh.1
crontab.5
cron.8
WARNINGS
If you inadvertently enter the
crontab
command with no argument, do not attempt to get out by typing
CTRL-D.
This removes all entries in your
crontab
file. Instead, exit by typing your interrupt character
(normally
CTRL-C).
Created by unroff & hp-tools.
© somebody (See intro for details). All Rights Reserved.
Last modified 11/5/97