I have a hard disk of 320 GB.
I have 3 OSes installed. There are 4 Primary partition and each of 20GB and one logical partition of 100GB.
So, there is 180GB of space is already occupied. And remaining is free sapce.
Today, I wanted to install one more OS. When I tried to select manually partition option and tried to create / partition of 15G size and of ext3 type.
It gave me error cant create any more primary partition.

So, I think I have to resize the EXTENDED partition and need to increase its size.

But, I dont know how to? Even fdisk is also not helping in resizing Extended partition. Can someone tell how ?

Use the gparted liveCD - it has a GUI tool to do it all.

Hi,
With Linux you are allowed to have 4 partitions. Within that limitation you can have 3 primary and 1 extended primary partition. Within the extended primary you can create multiple logical partitions within the allocated space for the extended primary partition. Or you could have 1 to 4 primary partitions that are stored in the partition table.

Your original partition scheme used the allowed partitions of four for the partition table.

You could look at 'Rute Tutorial & Exposition' to get some good examples.

Instead of downloading the Gparted CD you might just as well download GParted itself (the free partitioning program for Linux), it's not very big and is very easy to use.

http://gparted.sourceforge.net is the Gparted website where you can download it.

http://gparted.sourceforge.net/screenshots.php to get an idea of how it looks like (yes, it even looks easy to use )

Thanks all...

I used "qtparted" that comes with Knoppix live CD ...