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=Docker on Fedora 31=
https://www.reddit.com/r/linuxquestions/comments/dn2psl/upgraded_to_fedora_31_docker_will_not_work/<br>
https://fedoraproject.org/wiki/Changes/CGroupsV2<br
A Fedora31-ben bevezették a CGroupsV2-t amit a docker még nem követett le, ezért a docker a CGroupsV2-vel nem fog működni, ki kell kapcsolni.
1-
vim /etc/default/grub
2- Add Line below in GRUB_CMDLINE_LINUX systemd.unified_cgroup_hierarchy=0
<pre>
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
GRUB_DEFAULT=saved
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT="console"
GRUB_CMDLINE_LINUX="resume=/dev/mapper/fedora_localhost--live-swap rd.lvm.lv=fedora_localhost-live/root rd.luks.uuid=luks-42aca868-45a4-438e-8801-bb23145d978d rd.lvm.lv=fedora_localhost-live/swap rhgb quiet systemd.unified_cgroup_hierarchy=0"
GRUB_DISABLE_RECOVERY="true"
GRUB_ENABLE_BLSCFG=true
</pre>
3- Then :
# grub2-mkconfig
4- Restart your PC
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