CRONTAB 1
NAME
crontab - User crontab manipulation
SYNOPSIS
crontab -c [ user ] file crontab -l [ user ]
crontab -r [ user ]
crontab -p
DESCRIPTION
The
crontab program allows users to manipulate their personal crontab files. These
files are hidden in
/usr/spool/crontabs/ user where
user is the login name of a given user. The system daemon
cron uses these crontabs, among others, to run tasks that are to be repeated at
regular intervals. See
crontab (5) on what a good crontab file should look like.
Only the superuser can specify a user name to manipulate the crontab of a given user. Any other user can only touch their own crontab file.
OPTIONS
-c [user] file Install file as the crontab file of user .
-l [user] List the crontab file of user to standard output.
-r [user] Remove the crontab file of user .
-p Tell cron to reload its tables. Useful for system administrators to signal a change to any of the system crontab files. Changes made by the crontab program are signalled automatically. (Mnemonic: -p = "ping".)
FILES
\w'/usr/spool/crontabs/user'u+5n /usr/spool/crontabs/ user Per user personal crontab file.
"SEE ALSO"
crontab (5), cron (8). DIAGNOSTICS
Crontab preparses a new crontab and only installs it if correct. All errors are
sent to standard error, messages about installing a new table and telling
cron to reload are sent to standard output.
BUGS
Crontab misses a
-e option that other implementations of this command allow one to edit the
current crontab and install the result. Seems quite handy until you try to
install a new crontab from an automated script. That's why this command
has a
-c option that installs a prepared crontab file. Use
to get the same effect as "crontab -e" .
AUTHOR
Kees J. Bot (kjb@cs.vu.nl)
$PchId: crontab.1,v 1.3 2000/07/17 18:51:04 philip Exp $