How do i check the overall health of systemd managed server?



  • Man page for systemctl.

    $ systemctl is-system-running
    running
    

    One of many types of system status see table below:

           is-system-running
    	   Checks whether the system is operational. This returns success when
    	   the system is fully up and running, meaning not in startup,
    	   shutdown or maintenance mode. Failure is returned otherwise. In
    	   addition, the current state is printed in a short string to
    	   standard output, see table below. Use --quiet to suppress this
    	   output.
    
    	   Table 2. Manager Operational States
    	   +-------------+----------------------------+
    	   |Name	 | Description		      |
    	   +-------------+----------------------------+
    	   |initializing | Early bootup, before	      |
    	   |		 | basic.target is reached or |
    	   |		 | the maintenance state      |
    	   |		 | entered.		      |
    	   +-------------+----------------------------+
    	   |starting	 | Late bootup, before the    |
    	   |		 | job queue becomes idle for |
    	   |		 | the first time, or one of  |
    	   |		 | the rescue targets are     |
    	   |		 | reached.		      |
    	   +-------------+----------------------------+
    	   |running	 | The system is fully	      |
    	   |		 | operational.		      |
    	   +-------------+----------------------------+
    	   |degraded	 | The system is operational  |
    	   |		 | but one or more units      |
    	   |		 | failed.		      |
    	   +-------------+----------------------------+
    	   |maintenance	 | The rescue or emergency    |
    	   |		 | target is active.	      |
    	   +-------------+----------------------------+
    	   |stopping	 | The manager is shutting    |
    	   |		 | down.		      |
    	   +-------------+----------------------------+
    

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