So, how can I change the "/" partition to a bigger size once booted in Linux?? Please explain... Im running Mandrake 10.1

Because during the installation I selected for some reason a 2.0GB partition for "/"

Is there way to change it to 4.0GB in Mandrake?

Edit: This runs on Linux!

www.gnu.org/software/parted/

Can I change it in Linux or I have to use a third party utility like Parted? Please can you tell me how to install this? he documentation is a bit confusing.

There has to be a way to do this inside Linux. I can't do this. Sorry. Please explain the way to do it in Linux?

Since your running Mandrake you can use the partition manager in the Mandrake Control Centre (I think its under Mount Points->Partitions) to resize it. If it balks at resizing the root partition while running the OS then you'll have to download a livecd and use that.

Mandrake Move livecd should have the same mandrake partition manager program (but check on the website cause I'm not sure)
Knoppix livecd has qtparted which is a nice GUI frontend to the parted program someone mentioned.
Either will do the job.

A google might reveal other livecds which are smaller to download but still have the necessery partitioning tools for you.

Live CD is the only way to go unless you have another instance of Mandrake you can boot into.