Disk size after VPS upgrade

[mehargags]

you have to boot from gparted live CD (if you are on KVM VPS) and use it to expand your OS partition. Backup your VPS Data before doing this

this one?
im sorry but that does not help at all. never heard of gparted. i only have access to command line. that's it.

You are out of luck here then... you can't remake your floor while standing on it.
If you are not confident of yourself doing this, consider hiring someone and paying him a small fee. Sorry but their isn't any other easier way.