The /var/lib contains some unreadable contents, one of which is the mysql folder. I wanted to see the size of the /var/lib folder and the mysql folder in particular. Right-clicking on it and clicking on the "Properties" option gives me this:

In case you need the specs:

• Ubuntu 12.10


• Nautilus 3.4.2

EDIT:

`du -sh /var/lib` gives me this:

du: cannot read directory `/var/lib/sudo': Permission denied

du: cannot read directory `/var/lib/tor': Permission denied

du: cannot read directory `/var/lib/udisks2': Permission denied

du: cannot read directory `/var/lib/php5': Permission denied

du: cannot read directory `/var/lib/openfire': Permission denied

du: cannot read directory `/var/lib/gdm': Permission denied

du: cannot read directory `/var/lib/lightdm': Permission denied

du: cannot read directory `/var/lib/polkit-1': Permission denied

du: cannot read directory `/var/lib/mysql': Permission denied

du: cannot read directory `/var/lib/libvirt/qemu': Permission denied

du: cannot read directory `/var/lib/libvirt/sanlock': Permission denied

du: cannot read directory `/var/lib/libvirt/images': Permission denied

du: cannot read directory `/var/lib/libvirt/boot': Permission denied

266M    /var/lib

and sudo du -sh /var/lib gives this:

309M    /var/lib