Yes, exactly, I have just created virtual machine with 4cores(2 cores would be enough maybe) 5GB RAM and 30GB HDD, 20 is enough I think.
Than, launch jackpotcoin Linux wallet 1.4. , shut down, copy last DB files with wallet.dat and launch again.
That's all.
Thanks for your advice. I got Ubuntu running on Oracle VirtualBox with 4GB mem and 3 cores and 30GB harddrive.. got jackpotcoin-qt started and synced etc.. and yeeeees even my big wallet file worked

I could see ALL my coins... its really slow but not impossible slow as it was on windows...
one question, do you know if there is a way to turn on coin control on the linux version?