1.Enable developer mode: ESC + Refresh + Power button 2.Ctrl + Alt + Forward login as root. #passwd chronos 3.Ctrl + Alt + Backward 4.Ctrl + Alt + T : 5.Download crouton 6.(Optional) connect to USA vpn, cuz it's gonna download things at https://chromium.googlesource.com , if you in China ,you gonna stuck there! 7.Execute crouton see the list of available targets by running sh ~/Downloads/crouton -t help . Run sh ~/Downloads/crouton -r list to list the recognized releases and which distros they belong to. $sudo sh ~ /Downloads/ crouton - t touch , xfce - a i386 - r trusty Done ! 1.startxfce4 $sudo startxfce4 2.How to switch between Chrome OS & ubuntu? to Chrome OS : Ctrl + Shift + Alt + Backward to Ubuntu : Ctrl + Shift + Alt + Forward 3.Delete crouton $delete-chroot zesty