I have Ubuntu installed on my second partition.
I wanted to copy a folder and I got told ls
is an unknown command. So I tried to restart but it doesn't boot anymore. Just a console login appears but I cannot login there. If I boot from Ubuntu live USB stick it either doesn't start at all or the login screen appears and after entering Ubuntu I get back to the login. I want to repair the system but don´t know how.
(Dual boot from GRUB : Windows 10 and Ubuntu 15.04 64 bit)