It used to be that if wifi was not working you just did 'sudo wlan0
up.' Well, that doesn't work, but 'ifconfig wlan0' got me:
wlp82s0 IEEE 802.11 ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=off
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:on
So apparently my wifi is now wlp82s0. What an improvement (not!).
So then I did:
$ ifconfig wlp82s0 up
SIOCSIFFLAGS: Operation not permitted
jjj@Devil-Thinkpad:~$ sudo ifconfig wlp82s0 up
SIOCSIFFLAGS: Operation not possible due to RF-kill
Now I'm stuck. What is RF-kill? Where did it come from and why? How do
I make it go away?