Linux Learning -16-Scheduled Tasks (crontab)

At disposable

Crontab Cycle of tasks

At

/ETC/INIT.D/ATD restart

Chkconfig ATD on Boot

/etc/at.allow White List

/etc/at.deny blacklist

Actual Operation P588

Crontab

/etc/cron.allow

/etc/cron.deny

CRONTAB-E Editing a scheduled task (cron for users)

0 * * * mail Dmtsai-s "at" </HOME/DMTSAI/.BASHRC

Time-sharing Weekly command

0-59 0-23 1-31 1-12 0-7 P592

*/5 * * * */home/dmtsai/test.sh

/home/dmtsai/test.sh required every five minutes

* * 5 Mail [email protected]

Send a message every Friday 4:30

Crontab-l Query

Crontab-r Delete All Tasks

Delete a bar to edit with CRONTAB-E

System configuration file:/etc/crontab

Command patterns

* * * * * Dmtsai mail-s "testing" Kiki

The Mail command is executed every hour as the user of Dmtsai.

*/5 * * * * Root Run-parts/root/runcron

Execute/root/runcron executable every five minutes

*/5 * * * * root/bin/mrtg/etc/mrtg/mrtg.cfg

Perform the/BIN/MRTG in/etc/mrtg/mrtg.cfg every five minutes

Anacron P597

Linux Learning -16-Scheduled Tasks (crontab)