For some reason it was not activated. This is the first time I have
experienced swap not being active after a fresh install.
Actually. when I open Gparted the partition was there but indicated with
black (and a warning triangle, if I remember correctly).
I deleted that partition and created a new swap. Running the 'swapon -s'
command still showed no swap. I restarted, still no swap. Then I opened
Gparted again and noticed that swap wasn't on.
Like I said, this is the first time I have experienced this. Have done
something wrong during installation?