ubuntu start with command line

/etc/default/grub

GRUM_CMDLINE_LINUX="text"

sudo update grub

 

when I reinstall gnome, the file is the same, but the X-window comes back, then use the following method:

/etc/X11/default-display-manager

it may be /usr/sbin/gdm or /usr/sbin/lightdm, # it