The 4GB /boot is a bit odd, but otherwise, everything looks OK.
If it were my system, I would play/learn with it for a while and then reinstall the OS in a more logical manner.
The system is set up using Logical Volume Management v.2 (LVM2) and there’s lots of space available. With LVM, you add space to the logical volumes as you need it or add more logical volumes as your needs change, so it’s OK that most of the array is unused.
You should read about LVM before making any modifications. The main guide is the LVM HowTo, with the “Common Tasks” and “Recipes” sections being very helpful for the first time LVM user:
LVM HowTo: http://www.ibiblio.org/pub/Linux/doc...LVM-HOWTO.html
LVM Common Tasks: http://www.ibiblio.org/pub/Linux/doc...tml#commontask
LVM Recipes: http://www.ibiblio.org/pub/Linux/doc...O.html#recipes
One warning: Stay away from the LVM GUI config and do all LVM management from command line.
One important thing to remember with LVM is that when you make a logical volume larger, you then need to make the filesystem it holds larger if you want to make use of the extra space.
Likewise, when you want to make a logical volume smaller, you need to first reduce the size of the filesystem before you shrink the logical volume.
Keep in mind that when you are new to LVM, it’s relatively safe to increase the size of a logical volume and potentially unsafe to reduce the size of a logical volume.
Also, when you resize an ext3 filesystem, it should be unmounted.