On Thu, Oct 23, 2008 at 10:15 AM, Bill Campbell <centos at celestial.com> wrote: > > A somewhat cleaner way of doing this is to use the ``comm'' > command as it generates a straight list as opposed to diff which > requires parsing the output. > But comm also "requires" that the data be sorted. Otherwise you can get spurious output because lines that are actually the same but do not appear in order will show up as differences. I'd go with the rsync solutions already posted, but that's just me. mhr