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Explain how to determine hierarchy type from shell

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This makes it easier for people than just recommending the syscall.
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Florian Mayer 2020-07-10 18:40:36 +02:00 committed by Zbigniew Jędrzejewski-Szmek
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docs/CGROUP_DELEGATION.md
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@ -131,6 +131,8 @@ If you wonder how to detect which of these three modes is currently used, use
you are either in legacy or hybrid mode. To distinguish these two cases, run
`statfs()` again on `/sys/fs/cgroup/unified/`. If that succeeds and reports
`CGROUP2_SUPER_MAGIC` you are in hybrid mode, otherwise not.
From a shell, you can use check the `Type` in `stat -f /sys/fs/cgroup` and
`stat -f /sys/fs/cgroup/unified`.
## systemd's Unit Types