How to install Virtual Machine Manager to Mint or Ubuntu

Install Virtual Machine Manager on Mint or Ubuntu:

$ sudo apt-get install qemu-system qemu-utils libvirt-bin virt-manager python-spice-client-gtk virt-viewer

Exit fullscreen from Virtual Machine Manager on CentOS, Mint, Ubuntu

Exit fullscreen from Virtual Machine Manager on CentOS, Mint, Ubuntu

 
hit Ctrl-Alt to 'unhinge' the mouse and move the mouse to the top-middle of the screen.
A little applet drops down to allow you to leave full screen.

How to reconfigure time zone

Open a commad line, Terminal:

$ sudo dpkg-reconfigure tzdata

In Mint 17.1 solution for mate-daemon-setting when overloading CPU

Install  dconf-editor:
$ sudo apt-get install dconf-editor

run dconf-editor:
$ dconf-editor

go to org > mate > desktop > peripherals > keyboard

uncheck remember-numlock-state