12

Systemd can use one of three modes in regard to how it manages cgroups:

  • legacy
  • hybrid
  • unified

How can I check which one is it using?

Improve this question

1 Answer 1

Reset to default
17

According to Lennart Poettering:

Try this:

stat -fc %T /sys/fs/cgroup/

if that reports "cgroups2fs" then you are in full cgroupsv2 mode. If it returns "tmpfs" then you are in either full cgroupsv1 mode, or in hybrid mode. Then, check if /sys/fs/cgroup/unified exists. If it does, then you are in hybrid mode. if not you are in pure cgroupsv1 mode.

which translates to this shell code:

[ $(stat -fc %T /sys/fs/cgroup/) = "cgroup2fs" ] && echo "unified" || ( [ -e /sys/fs/cgroup/unified/ ] && echo "hybrid" || echo "legacy")
Improve this answer

You must log in to answer this question.

Start asking to get answers

Find the answer to your question by asking.

Ask question

Explore related questions

See similar questions with these tags.