Getting http://www.swi-prolog.org/download/stable/doc/SWI-Prolog-6.6.1.pdf to ./SWI-Prolog-6.6.1.pdf
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
  1 1862k    1 31426    0     0  25602      0  0:01:14  0:00:01  0:01:13 25591
 30 1862k   30  573k    0     0   257k      0  0:00:07  0:00:02  0:00:05  257k
100 1862k  100 1862k    0     0   681k      0  0:00:02  0:00:02 --:--:--  681k
./userguide.html.tgz already exists, skipping download
Getting http://www.swi-prolog.org/download/xpce/doc/userguide/userguide.html.tgz to ./userguide.html.tgz