command format is as follows:
* * * * command
Time-sharing and Lunar Week command
The 1th column represents minutes 1~59 per minute with * or */1
The 2nd column represents the hour 1~23 (0 for 0 points)
The 3rd column represents the date 1~31
The 4th column represents the month 1~12
The 5th list of the week 0~6 (0 for Sunday)
6th column the command to run
The specific modification method is as follows:
Use the SSH login server and enter the CRONTAB-E command to enter the Cron Scheduled Task table by clicking Enter.
Under the # m H Dom Mon Dow command, add one line:
*/1 * * * * */ROOT/LNMP restart//reboot once every 1 hours;
or 0 0 * * * * */ROOT/LNMP Restart//0-point reboot per day.
If you are using CentOS, then enter the CRONTAB-E command may be a blank document, so that only the key to the keyboard I enter the editing mode, and then the above you need to enter the command, and then click Esc to exit the edit state, and then enter: Wq return to save.
To confirm success, you can use the Crontab-l command to view the list of scheduled tasks.
Some examples of crontab files:
* * * */etc/init.d/nginx restart
21:30 restart Nginx per night.
4 1,10,22 * */etc/init.d/nginx restart
1, 10, 22nd of 4:45 restart Nginx per month.
1 * * 6,0/etc/init.d/nginx restart
Every Saturday, Sunday of 1:10 restart Nginx.
0,30 18-23 * * * */etc/init.d/nginx restart
Restart Nginx every 30 minutes from 18:00 to 23:00 every day.
0 * * 6/etc/init.d/nginx restart
11:00 PM restarts Nginx every Saturday.
* */1 * * * */etc/init.d/nginx restart
Restart Nginx every hour.
* 23-7/1 * * * */etc/init.d/nginx restart
Between 11 o'clock and 7 in the morning, restart nginx every hour.
0 4 * Mon-wed/etc/init.d/nginx restart
4th per month with 11 points per Monday to Wednesday restart Nginx
0 4 1/etc/init.d/nginx * Restart
Restart Nginx at 4 o ' January 1.
*/30 * * * */usr/sbin/ntpdate 210.72.145.20
Sync time every half hour