Somehow just after rebooting my PC, Ubuntu wouldn´t boot
Giving me this error, i seriously don´t know what happened but im sure it can be fixed
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This can mean a corrupted filesystem. Boot the live CD and use it to check your root partition.
The root partition is the one that contains the Ubuntu.
For example you can check the filesystem on partition
sudo fsck /dev/sda1
If you're not sure which partition to take, you can list them with:
sudo fdisk -l /dev/sda
sda is your first disk,
sdb second, etc...