WiFi not available - SOLVED

To resolve the WiFi not available message in Linux:

  1. Find out which network interface is having the problem using
    # iwlist scan.

    In my case, it was wlp86s0

  2. Bring that network interface down. Eg, by typing
    # sudo ip link set wlp86s0 down
  3. Then bring it back up. Eg, by typing
    # sudo ip link set wlp86s0 up
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