> However, I've forgotten how to turn on wifi networking from rescue mode.

> 

> Can anybody point me to a tutorial?

You could use the "iw" commands:

man iw

which should give you the info you need.

"NAME

       iw - show / manipulate wireless devices and their configuration"

if you would like to review a tutorial:

http://linuxcommando.blogspot.com/2013/10/how-to-connect-to-wpawpa2-wifi-network.html

has a decent write up if a bit dated.  Should get you pointed in the right direction but everything still looks good on quick review.

HIH,

Fred

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