How to unblock Facebook from a Linux Computer?
 

My husband blocked my computer from facebook. How can I unblock it?

You can always pull a Lysistrata...

PS:
You're not married to this guy, are you?

PPS:
Great episode of South Park with a slightly different view of Facebook you might enjoy...

Yeah, the withholding of marital privileges would rectify that situation methinks... :)

Have you discussed his reasons for wanting it blocked?

The answer to your question depends upon how he did it...