Earlier I was installing some applications on my little sisters Macbook Pro and needed to verify how much disk space was available. I was installing numerous applications and I wasn’t sure how large her hard drive was or how much space she had already used. Below is a brief explanation on how to find out how much disk space is available on a Mac running OSX, which in this example is specifically OSX Leopard, using both the terminal or some graphical tools.
If you have installed Cydia on your iPhone or iPod Touch running 3.X firmware there is a good chance that after instaling a bunch of applications you could get to a point that you are running out of disk space on the root partition. By default the root partition is going to only be 500MB and so far I have not found a great way to resize this so it is much easier to resolve using the below method. Cydia does a pretty good job of relocating a lot of the folders from the root (mounted at /) partition to larger var partition (mounted at /private/var).