How to backup lxc and restore in QNAP NAS
Backup:
cd /var/lib/lxc/${lxc_name}/
tar --numeric-owner -czvf ${lxc_name}.tar.gz ./*
Restore:
mkdir/var/lib/lxc/${lxc_name}/
cd/var/lib/lxc/${lxc_name}/
tar --numeric-owner -xzvf ${lxc_name}.tar.gz .
${lxc_name} should be your lxc`s name.