2-5 crontab configuration file format
Points: range 0~59
Hours: range 0~23
Day: Range 1~31
Month: range 1~12
Week: Range: 0~6, 0 and 7 both indicate Sunday
Command to run
Scope: command or script
----------------------------
*
/ For every
*/2 every 2 minutes
Hours: */5 every 5 hours
to validate:
systemctl restart crond