LInux Crossword

1234
Across
  1. 3. Free and open-source Unix-like operating system descended from Research Unix via the Berkeley Software Distribution (BSD).
  2. 4. Free and open-source Debian derivate currently on 16.04.3 LTS
Down
  1. 1. KDE Ubuntu flavour.
  2. 2. Famous Linux Distro, starts at letter D.