System V style init and systemd in practice
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Listing Processes (systemd)
The administration via systemd puts each service into its own kernel control group or cgroup . This lets you determine, at a glance, which processes belong to which unit.
You will find a tree view similar to the one in pstree (Figure 8).
Figure 8: A process tree presented with systemd-cgls.
Creating a Container (systemd)
You can create containers with the systemd-nspawn instruction. This topic is too big for the space restrictions of this article, so that subject matter receives only a mention here. Containers can be queried with the following command:
systemctl list-machines
See Figure 9.
Figure 9: Listing of a container.
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