方案一：
$ sudo dnf install grubby
$ sudo grubby --update-kernel=ALL --args="systemd.unified_cgroup_hierarchy=0"
$ reboot
方案二：
[root@localhost yeqiang]# sudo vim /boot/efi/EFI/fedora/
kernelopts後面增加systemd.unified_cgroup_hierarchy=0
saved_entry=0
menu_auto_hide=0
boot_success=1
kernelopts=root=/dev/mapper/fedora_localhost--live-root ro resume=/dev/mapper/fedora_localhost--live-swap rd.lvm.lv=fedora_localhost-live/root rd.lvm.lv=fedora_localhost-live/swap rhgb rd.driver.blacklist=nouveau systemd.unified_cgroup_hierarchy=0
boot_indeterminate=3
重啓