ip
next ifconfig 
[URL] https://www.cyberciti.biz/faq/linux-ip-command-examples-usage-syntax/
ip 
subcommand

addr  디바이스 주소 리스트
link  디바이스 업다운등

ip link set [eth0] up
ip l[ink] set [eth0] down
option

-br brief
-c  color
-4  filter ipv4
-6  filter ipv6
-s  show statistics

link

ifconfig
netplan
dhclient
vpn