Hi
Sometimes, after powerloss Ubuntu hangs on boot or asking to fix filesystem errors.
To avoid this problems simply edit following files:
Edit the file:
/etc/default/grub
GRUB_RECORDFAIL_TIMEOUT=2
After that you have to rebuild grub configuration:
update-grub
Edit the file:
/etc/default/rcS
FSCKFIX=yes
EDIT 16.05.2018:
Ubuntu 18.04 /etc/default/rcS missing due to systemd
You have to pass a kernel parameter
https://www.freedesktop.org/software/systemd/man/systemd-fsck@.service.html
/etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash fsck.repair=yes"
Dont forget to run update-grub
Have fun!