# man crontab
              variables.  After you exit from the editor, the modified crontab will be installed automatically.

       -i     This option modifies the -r option to prompt the user for a Б─≥y/YБ─≥ response before actually removing the crontab.

       -s     It will append the current SELinux security context string as an MLS_LEVEL setting to the  crontab  file  before
              editing / replacement occurs - see the documentation of MLS_LEVEL in crontab(5).

SEE ALSO
       crontab(5), cron(8)

FILES
       /etc/cron.allow
       /etc/cron.deny

STANDARDS
       The  crontab  command  conforms to IEEE Std1003.2-1992 (Б─≤Б─≤POSIXБ─≥Б─≥).  This new command syntax differs from previous ver-
       sions of Vixie Cron, as well as from the classic SVR3 syntax.

DIAGNOSTICS
       A fairly informative usage message appears if you run it with a bad command line.

AUTHOR
       Paul Vixie <vixie@isc.org>

4th Berkeley Distribution       16 Januar 2007                      CRONTAB(1)