Error: 'Unknown user: ${UID_MIN}' encountered while starting the audit.rules service

Issue

• During the attempt to start the auditd service on a Red Hat Enterprise Linux server, the following error was encountered:

  Nov 14 19:22:26 rhel.example.com auditctl[4380]: Unknown user: ${UID_MIN}
  Nov 14 19:22:26 rhel.example.com auditctl[4380]: There was an error in line 5 of /etc/audit/audit.rules
  

• This error indicates that the variable ${UID_MIN} is not being recognized, leading to the failure of the audit service to start properly.