How can I restore my system,
At starting trhows th next error:

Switching to new root and running init
.
.
.
switchroot: mount failed: No such file or directory
kernel panic - not syncing: Attempted to kill init!


I´m afraid that trying to change my disk partitions I accidentally delete some part of the root directory. Is it possible to restore from the rescue disk? or how can I manage this problem?
Thanks in advance.

Oh boy! If you have a copy of your partition parameters it would help. You can create such a file with the command sfdisk. Afteward you can restore the partition parameters.

If not then there's a way to dump the entire hard disk to an image then you can run a program like foremost that extracts all the files. However, it could take many hours, like 10, 12 even 24 hours to get all the files.

It's lengthly procedure that is not 100% accurate, but you may be able to get most of your files. I only recommend doing this if there's no backup and they are critical files.