Instructions for enabling the memory cgroup on Ubuntu 18 and 19 involve adding cgroup_enable=cpuset cgroup_enable=memory cgroup_memory=1 to /boot/firmware/nobtcmd.txt and restarting. After rebooting, grep mem /proc/cgroups should show it as enabled.

I find that on Ubuntu 20.04 the above instructions are not working for me, and Kubernetes continues to error [ERROR SystemVerification]: missing cgroups: memory. Any suggestions?

1 Answer 1


I was able to get this working by appending cgroup_enable=cpuset cgroup_enable=memory cgroup_memory=1 to the file /boot/firmware/cmdline.txt. Changes made to /boot/firmware/nobtcmd.txt in Ubuntu 20.04 appear to be ignored (there's a note in config.txt about cmdline=nobtcmd.txt being deprecated in favour of include commands).

  • Thanks can confirm, this actually works on 20.04
    – Alex W
    Jul 23, 2021 at 3:43

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