Add a hidden wireless network

I just installed LibreElect on an old Dell laptop and while the wired connection works, when I try to connect to a wireless network, I'm only seeing the networks that broadcast their SSIDs. How can I manually set up a wireless network with a hidden SSID? I did some searching on how to do this but the commands are either missing or not working, specifically the IP and IWCONFIG (deprecated) commands.

Thanks,

Jon

Thanks! I'll give it a try...