You receive an email from "Security Advisor" containing information similar to the following.
|Detected 1 service that is running outdated executables: httpd.service You must take one of the following actions to ensure the system is up-to-date:
When "Security Advisor" runs, it checks for services running outdated executables. When such services are found, "Security Advisor" sends an email notifying the system administrator that services need to be restarted.
While most services can be restarted with the
systemctl command, others, such as
systemd, require a reboot. To ensure that all services are restarted, the server should be rebooted.