Network device name
 

I'm trying to setup a vpn and the tutorial says that if you have wifi use your network device name instead of "eth0" but idk what it is
how do i find out?

I do belive
 

I belive you can use the command

#ip link

I'll show you the device name in the 2nd line at the beginning..

Try For a wireless device its often like wlan0 or similar.
If in doubt, post the output of the ifconfig cmd.

ifconfig worked perfectly, thanks chris!

Glad to help :)
Incidentally, on RHEL derived/related distros, the device cfg files are in /etc/sysconfig/network-scripts.