Linux crontab Creating Scheduled Tasks

Tag: rc.d command means log man png Apache. Local Plan

1. Edit a Scheduled task

Edit Crontab File

Crontab-e

2. View the scheduled task log

View Crontab Logs

Tail-100f/var/log/cron

3. Create a Scheduled task format

(1) Basic Format:* * * * * command time and Moon week the 1th column represents minutes 1~59 per minute with * or */1 to indicate that the 2nd column represents the hour 1~23 (0 means 0 points) The 3rd column represents the date 1~31 4th column represents the month 1~12 5th column identification Number week 0~6 (0 table shown in Sunday) the 6th column to run commands (2) Some examples of the crontab file are: * * * * * * * * * * * * * * * * * * */USR/LOCAL/ETC/RC.D/LIGHTTPD Restart above example indicates that 21:30 restarts Apache per night. 4 1,10,22 * */USR/LOCAL/ETC/RC.D/LIGHTTPD Restart the above example shows the 4:45 restart Apache per month for 1, 10, 22nd. 1 * * 6,0/USR/LOCAL/ETC/RC.D/LIGHTTPD Restart the above example shows that 1:10 restarts Apache every Saturday and Sunday. 0,30 18-23 * * * */USR/LOCAL/ETC/RC.D/LIGHTTPD Restart the above example shows that Apache restarts every 30 minutes from 18:00 to 23:00 every day. 0 * * 6/USR/LOCAL/ETC/RC.D/LIGHTTPD Restart the above example indicates that the Apache is restarted every Saturday. * */1 * * * */usr/local/etc/rc.d/lighttpd restart every hour restart apache* 23-7/1 * */usr/local/etc/rc.d/lighttpd restart 11 o'clock to 7 a.m. , restart every hour apache0 4 * mon-wed/usr/local/etc/rc.d/lighttpd Restart monthly 4th and 11 points per Monday to Wednesday apache0 4 1 Jan */USR/LOCAL/ETC/RC . d/lighttpd Restart January 1 4-point restart Apache

Linux crontab Creating Scheduled Tasks