changing a drive

[Tim Hanson]

When I installed 10.04 a couple of years ago, I set a usb drive as my home 
directory, so that when I boot the laptop I get an error message (with an offer 
to wait until the drive is connected) if I haven't plugged it in.  It has been 
working fine all this time.

Now I have a new, larger usb drive on which I would like to copy /home.  I am 
accustomed to another distro that has a graphical partition manager which gets 
the UUID set up properly and takes care of all the details.  I have seen the 
disk utility provided with Ubuntu and I don't see a partition manager.  Where 
do I find it?