This looks like your linux partition has only about 3G and that is pretty small
for loading modern applications. There are several things you can do and the
first is to add aother drive and you can mount this drive as part of your file
system. Another item is find files that you can safely delete. Try going to
the /boot directory and see if you have more than one linux kernel file. If you
have an old kernel you should be able to safely delete it. Look for files with
a .tar or .tar.gz extensions as these files may have already been installed and
can be deleted.