docker 添加 docker0

https://forums.gentoo.org/viewtopic-t-1057928.html?sid=cecf2d2a4b6124e56626087840e81780

#!/bin/bash 

# 
# create docker0 bridge 
# restart docker systemd service 
# confirm new outgoing NAT masquerade is set up 
# 
# reference 
#     https://docs.docker.com/engine/userguide/networking/default_network/build-bridges/ 
# 


sudo brctl addbr docker0 
sudo ip addr add 192.168.42.1/24 dev docker0 
sudo ip link set dev docker0 up 
ip addr show docker0 
sudo systemctl restart docker 
sudo iptables -t nat -L -n 

exit(0)