Putting IP Address into bash variable. Is there a better way

Question

I\'m trying to find a short and robust way to put my IP address into a bash variable and was curious if there was an easier way to do this. This is how I am currently doing

Answer 1

I am using

IFACE='eth0'
IP=$(ip -4 address show $IFACE | grep 'inet' | sed 's/.*inet \([0-9\.]\+\).*/\1/')

The advantage of this way is to specify the interface (variable IFACE in the example) in case you are using several interfaces on your host.

Moreover, you could modify ip command in order to adapt this snippet at your convenience (IPv6 address, etc).