[snip]
Well, you could try the old link trick. First of all locate the biggest
directory(ies) residing in /, e.g.
du -sh /*
then, move that directory and all of its contents to a bigger
partition, where space is not a problem, e.g.
cp -R /big_dir /scratch/
then create a link in / with the old dir name, and pointing to the new
location, e.g.
ln -s /scratch/big_dir /big_dir
Yes, it is a dirty trick, but will save your day until you repartition
properly (say, when reinstalling the whole system).
HTH,
Basajaun