[ Thanks to linuxaria for this link.
“1 Boot with another Linux: What do you need: a Live CD/USB
Stick, it’s better to use a recent distribution, i used for this
Ubuntu 11.04 on a USB Stick (1 GB). Once that the live distribution
has booted, open a terminal and become root (usually a sudo -i is
enough). Also check the internet connection, we could need to
download something later.
“2 Mount of your filesystem: Now you have to find the partition
where you keep your / and if you use it the /boot. To see the
status of your partitions use.”