Im Container:
https://unix.stackexchange.com/questions/381448/systemd-networkd-wait-online-failure

sudo systemctl disable systemd-networkd-wait-online
sudo systemctl mask systemd-networkd-wait-online

-------

autodev-script (Container Bauanleitung)
https://github.com/sbstp/docs/blob/master/lxc.md

<CODE>
#!/bin/bash
cd ${LXC_ROOTFS_MOUNT}/dev
mkdir net
mknod net/tun c 10 200
chmod 0666 net/tun
<\CODE>

vim /var/lib/lxc/ct/config
lxc.autodev = 1
lxc.hook.autodev = /var/lib/lxc/ct/autodev