Red Hat Enterprise Linux Server Cookbook

The systemd service and setting runlevels

The systemd service doesn't use runlevels as SysV or Upstart do. The alternatives for systemd are called targets. Their purpose is to group a set of systemd units (not only services, but also sockets, devices, and so on) through a chain of dependencies.

How to do it…

Managing targets with systemd is pretty simple, as shown through the following steps:

1. List all target units, as follows:

   ~]# systemctl list-unit-files --type target
   UNIT FILE                 STATE   
   anaconda.target           static  
   basic.target              static  
   bluetooth.target          static  
   cryptsetup.target         static  
   ctrl-alt-del.target       disabled
   default.target            enabled
   ...
   
   sysinit.target            static  
   system-update.target      static  
   time-sync.target          static  
   timers.target             static  
   umount.target ...