I'm getting short on partition space, and I'm looking for a program that can increase the size of my partition. Problem is, I've tried using a program called BootIt, which, when I try to upsize the partition, says I need to increase the size of the FS before increasing the partition size (using resize2fs). Then, when I try to do that, resize2fs tells me that I need a bigger partition for it to resize on. Any ideas on a partition manager that can increase partitions without this hassle? Preferably for Linux, since I don't have Windows on this machine.

You can do this using resize2fs; see the manpage.

Basically, use fdisk to delete the partition, then recreate it with a larger size, at the same starting cylinder. (NB: This method won't let you move the start-point of the partition, and you should not try to format the new partition). Then use resize2fs.

There's a Linux program called gnuparted (try searching for it on freshmeat.net or gnu.org) that can resize partitions; though I haven't used it.

I've tried parted, it doesn't like my ext3 partition. The partition I want to upsize is my root partition, so I can't afford to delete it.

You will not be able to resize a partition if it's mounted in any case; you will need to use a boot disk.

Just to clarify: deleting and then immediately recreating the partition (not the filesystem) will not in itself lose you any data; it will just move the end-of-partition marker. (in theory at least; always take a backup when resizing partitions!) If you were to mount it in this state (after recreating the partition), you would have the same partition contents (and size) and some dead space on the disk.

I use ext3 because I can change it to ext2 with
tune2fs -O ^has_journal /dev/hda10
Then I can use my favourite partition resiser (I still use Partition Magic 5.something). I can then chage it back with
tune2fs -j /dev/hda10
This is covered in detail at http://www.troubleshooters.com/linux/ext2toext3.htm
Naps

I'll try the Ext3-Ext2 conversion, thanks.