General

Interfaces

How to restart ?

First check the file syntax using sudo ifup --no-act br0.

Then safely restart with sudo ifdown br0 && sudo ifup br0

Monitor input/output in real time

sudo iftop

IPs

IP address show

ip a s

IP route show

ip route s

Interfaces

Bring interface up (Ubuntu 18, NetPlan)

sudo ip link set ens4 up

Ports

Check open ports on remove host

nc -zv website  80

IPs

Check public IP

curl ip.gitcommit.fr