commands/crontab/crontab.1

         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


crontab -l >/tmp/tab
${EDITOR-vi} /tmp/tab
crontab -c /tmp/tab


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 $