Comment 12 for bug 1508248

Still affects Ubuntu 16.04. 'ssh -G' is a valid command; 'ssh -Z' (or any remaining unused option) should be used.

See
https://askubuntu.com/questions/709545/chkrootkit-says-searching-for-linux-ebury-operation-windigo-ssh-possible-l

for a script to check for 'Operation Windigo' presence.