Cron job not working in CPanel

Description: Cron jobs stopped working suddenly in CPanel Server

Procedure: Below are steps to troubleshoot issue

• Make sure Cron service running 
• check permission in /usr/bin/crontab it should be 4775 if it is different, then change it using below command 

# useradd authuser
# chmod 4775 /usr/bin/crontab

• Check permission in /var/spool/cron it should be as follow:

drwx------. 2 root root 4.0K Jul 8 15:34 .
drwxr-xr-x. 16 root root 4.0K Jul 8 15:23 ..
-rw------- 1 root root 1 May 11 20:53 demosite1
-rw------- 1 root root 1 May 15 12:52 testsite1
-rw------- 1 root root 1.3K Jun 6 21:04 example
-rw------- 1 root root 583 May 27 21:39 democy
-rw------- 1 root root 1 May 11 20:54 demowriterpay
-rw------- 1 root root 1 May 11 20:54 origianl