Whenever we update a critical library such as OpenSSL, we need to restart any daemons that use the library. Systemd with PID 1 itself also uses OpenSSL. How do you restart the systemd daemon without rebooting Linux and other services such as Nginx, SSHD, Firewalld? Here are some tips.
We can use various commands to determine if services or Linux daemons need restarting when critical libs are installed. On many Linux distro, services are automatically restarted. For example, when OpenSSL update is installed but services such as PHP-cgi or Apache/Nginx will not restart. So we need to hunt down those services and restart those services, including systemd.
