Resizing virtual machine harddrive in RHEL 5

[Ryan Golhar]

Hi,

I'm running a virtual machine using RHEL 5 virtualization.  The virtual 
machine has a hard drive image create has a file image on the host 
machine.

Is it possible to increase the size of the hard drive or must I create 
another disk image and mount it as a second hard drive?  I would prefer 
being able to resize the hard drive to keep the machine as one file but 
not sure how I would do this.

Ryan