I have problems understanding my disk space usage. I am using Ubuntu 12.04. I am recently going low on disk space and I cannot understand why. Here is the result of du (only largest folders).
716.0K Videos 1.1M giorgio2.pdf 1.7M 2011_Thesis_Caroline_Ferdinand.pdf 2.1M 031022_1.pdf 2.4M dgfem 29.7M aux 362.6M Papers 479.3M Desktop 588.6M Documents 1.8G vtk 3.0G Dropbox 38.0G Pictures 105.9G Music
Here is the result of df -h
Filesystem Size Used Avail Use% Mounted on /dev/sda6 322G 304G 1.4G 100% / udev 3.9G 4.0K 3.9G 1% /dev tmpfs 1.6G 940K 1.6G 1% /run none 5.0M 0 5.0M 0% /run/lock none 3.9G 736K 3.9G 1% /run/shm
What I don't understand is where the 304G used come from. The result of du does not sum up to that amount. That make me difficult to free space (as you see I have only 1.4G available). What am I missing here?
I add an image of Disk Usage Analyzer. The point is that the first 10 largest folders sum up to less than 165G. But still my home folder uses 312G.