How do i know if my cpu supports 64 bit OS?

Just run:

grep flags /proc/cpuinfo | grep " lm "

If you get any output, your cpu supports 64bit OS


Remmina suddenly stops working via RDP to a Windows machine

Sometimes Remmina stops working for no apparent reason. If you are sure that everything else is setup properly (connection information, security settings at your server etc) then you can try to remove known hosts with the command:

rm ~/.freerdp/known_hosts.