How do I find my internal ip address?
Solution 1:
hostname -I
This will give you just ip address without any extra information.
Solution 2:
These commands will tell you all network info
ip add
or
ifconfig -a
If as you say it only gives you 127.0.0.1 then there are two options:
Your network card is not attached or not recognized by the system
Your network DHCP server is not runnning or not connected