Solve the puzzle

What if the lxc command says it can't be found after LXD is installed?

! lxc -h >/dev/null 2>&1 && echo 'alias lxc="/snap/bin/lxc"' >> /root/.bashrc && source /root/.bashrc
export PATH=$PATH:/snap/bin

After executing this command try

lxc -h

to see if the lxc command is fixed.

What to do if you open centos7 and find that CGroupV1 is not supported?

Enable CGroup V1: To enable CGroup V1 on an Ubuntu system, you need to edit the kernel boot parameters.

Please note that before changing kernel boot parameters, make sure to back up important data and settings to prevent unexpected problems.

Edit the /etc/default/grub file and add systemd.unified_cgroup_hierarchy=0 to the end of GRUB_CMDLINE_LINUX_DEFAULT, like this:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash systemd.unified_cgroup_hierarchy=0"

Save the file and run the following command to update the GRUB boot.

sudo update-grub

Reboot the system for the changes to take effect

If CentOS 7 still cannot start after this change, try a different host system.

Requires both LXD and Docker compatibility to exist

If left unaddressed, Docker can override iptables rules and break LXD networking.

You need to install a scheduled task to detect and fix this issue

curl -L https://raw.githubusercontent.com/oneclickvirt/incus/main/extra_scripts/docker-coexistence.sh -o docker-coexistence.sh && chmod +x docker-coexistence.sh && bash docker-coexistence.sh

Currently verified VPS vendors that can open containers with separate IPv6 addresses.

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