Ubuntu – Lock Ubuntu Server 12.0.4

The easiest way is to add the parameter consoleblank=0 to your kernel command-line at boot-time.

• Open /etc/default/grub in your favorite editor; you will need to use sudo (for vi, nano, etc.) or gksudo (for gedit, etc.).

• Then add consoleblank=0 to the GRUB_CMDLINE_LINUX_DEFAULT=, parameter.

• e.g. yours may say:

  GRUB_CMDLINE_LINUX_DEFAULT="quiet splash consoleblank=0"

Then run sudo update-grub, and reboot.