How do i find how much used disk space is on my harddrive. Is there a command for this.I used apt-get remove to get rid of files and thought I had deleted about 370MB of files and i am sure that i haven't installed anywhere near that but right clicking on my hda5 suggests that i have used nearly 5GB of space and looking in my system there are still folders with some of tjheb supposedly removed files still there. When i do dpkg -W or dpkg -l the files that i thought i had deleted are still there, but when I do apt-get remove again it says the files don't exist. I used apt-get -remove , deborphan and apt-get clean to remove the packages.