When I start the computer it seems ubuntu is loading normally, but a few seconds later I get black screen with this message:
BusyBox v1.21.1 (Ubuntu 1:1.21.0 - 1ubuntu1) built-in shel (ash)
Enter 'help' for a list of built in commands
(initramfs)_
From there I can only 'reboot'. I typed 'help' and i got a list of commands i dont know and tried some of them like exit
Recovery Mode - Terminal
Have you tried rebooting into recovery mode? When the boot options screen appears:
Advanced options > ***** (recovery mode) Accessing recovery mode
This will allow you to access the terminal as root, and update graphics drivers etc.
Fixes
Back up first! you may damage your system trying to fix it so use this guide to backup in recovery mode.
Copy files to USB in recovery mode
It depends on what your problem is specifically. But here's some similar problems that may apply to you.
