Systemd is the first process which will get started by kernel and holding PID 1. It can work as a drop-in replacement for sysvinit system. Systemd is compatible with SysV and LSB init scripts. Systemd is a new init system and system manager which was implemented/adapted into all the major Linux distributions over the traditional SysV init systems. We already had developed a bash script to automatically start a services when it’s crash on Linux. It’s very easy to automate this on systemd systems because it has an options to enable this.
One thing you can do it immediately to bring the service back to online is auto start when it goes down, which eventually reduce the downtime for better availability and to make sure that your service will be always available for users access.
There are many reasons for systemd crash/go down on Linux, which you can investigate and fix ,but it is time consuming.
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