...connect to a Wireless Network from Terminal...

How do I connect to a Wireless Network from Terminal-only?

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View available wireless networks:

Code:

iwlist  scan

(Replacing with your wireless interface [for example mine is eth2)
If you don't get any networks listed:

Code:

ifconfig  up

To turn on your wireless interface.
If your wireless network is WPA encrypted:

Code:

iwconfig  essid  key s:

(Note: I use "s:" so that I can enter my key in ASCII form e.g. "Kll4Wx"
If your network isn't secured:

Code:

iwconfig  essid 

I hope this helps, if you want more help just let me know!