Failsafe is single-user mode, usually used by the root user (superuser, or system administrator), which boots the system into command-line mode, with minimal system capabilities.

Is there a safe mode for Ubuntu?

To start Ubuntu into safe mode (Recovery Mode) hold down the left Shift key as the computer starts to boot. If holding the Shift key doesn’t display the menu press the Esc key repeatedly to display the GRUB 2 menu. From there you can choose the recovery option.

How do I start Ubuntu in safe graphics mode?

To begin the installation, insert the Ubuntu CD in the CD drive and boot from it. When presented with the Ubuntu menu, select the option to start Ubuntu in safe graphics mode (the graphics will be fixed later). When Ubuntu starts, double click the Install icon on the desktop to start the installation.