I use Ubuntu 14.04 LTS and my laptop is a Dell XPS L502X.
My laptop has stopped working, when I start it up I get this
error:attempt to read or write outside of 'hd0' press any key to continue...
I know for a fact that during boot I can repeatedly tap the esc to get into the grubloader and from there press 'c' to get into a command line screen
If I do 'ls' it shows (hd0) (hd0,msdos5) (hd0,msdos1)
How do I fix this?
EDIT: this is the output of
ubuntu@ubuntu:~$ df --human
df: ‘/var/lib/polkit-1/localauthority/90-mandatory.d’: Permission denied
Filesystem Size Used Avail Use% Mounted on
/cow 3.9G 443M 3.5G 12% /
/dev 3.9G 12K 3.9G 1% /mnt/dev
tmpfs 788M 1.2M 787M 1% /run
/dev/sdb1 7.2G 980M 6.3G 14% /cdrom
/dev/loop0 939M 939M 0 100% /rofs
none 4.0K 0 4.0K 0% /sys/fs/cgroup
tmpfs 3.9G 9.0M 3.9G 1% /tmp
none 5.0M 4.0K 5.0M 1% /run/lock
none 3.9G 516K 3.9G 1% /run/shm
none 100M 60K 100M 1% /run/user
/dev/sda1 909G 13G 851G 2% /mnt