Short story short:
Xubuntu 16.04.1
Have added rep via terminal:
sudo add-apt-repository ppa:knapsu/openxcom
updated, then did:
sudo apt-get install openxcom
and have this:
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package openxcom
Help me, powerful and splendid All !
Knappsu did not make a package for Ubuntu 16.04.
I recommend installing it from github directly.
With ubuntu 16.04 you will also have to manually install libYAML from github, because they deliver the wrong version.
EDIT: you may wanna read
THISGeneral Linux install procedure can be found
HERE and
HEREHave fun