Open up a terminal and run ifconfig > wired.txt along with iwconfig >wireless.txt
Both files will save to your directory in Home under your username. If you want those files saved in downloads, you would just do a cd >Downloads , then run the two commands I posted and the files will be saved in the downloads directory. Just remember that the word 'd' is capitalized and Linux does not ignore that without some changes.
Ren: Now listen, Cadet. I've got a job for you. See this button? Ren: Don't touch it! It's the History Eraser button, you fool! Stimpy: So what'll happen? Ren: That's just it. We don't know. Maybe something bad, maybe something good.