I tried to install calibre using synaptic but it failed. I ran "dpkg ---configure -a" to fix problem. oddly, I get the error dpkg: failed to write status record about "maxima" to '/var/lib/dpkg/status': No space left on device When I do a df it appears that there is plenty of space. So my question is, as I'm concerned about removing files that should not be touched, where are some good places to look to remove files to clear space for this installation?