Hi everyone acutally im user fedora 12.i have one partition which is mounted on a rootfiles folder having space of 700gb which is located on a /directory.but when im adding data on rootfiles my /root directory space is also getting increased.so could any one telme how to increase the size of root partition.i want to resize my rootfiles folder to 600db and want to add 100gb to my / directory.how can i do this plz helpme this is important 4 me.first i will free 100gb then i will add 100gb to root directory.but i dont want to loose any data on rootfiles folder.plz helpme any help appreciated.

have you tried playing with gparted?

thanks for ur reply can i achieve my target with gparted?how to change size of root partition while it is mounted?

You can not. The partition must be unmounted before it can be resized.

May I suggest you back up your essential files before you start this operation?

Then run gparted from a live cd and resize your (unmounted) partition(s).
Reboot.