Upgrade guidance

[Bruce Dawson]

Ben Scott wrote:
> On Mon, Oct 20, 2008 at 8:08 PM, Bill McGonigle <bill at bfccomputing.com> wrote:
>   
>> Oh, I forgot to mention, here's a little script I wrote to help me
>> find the cruft that a yum upgrade somehow manages to leave behind on
>> occasion (imperfect Obsoletes: I assume):
>>     
>
> (... Google ...)
>
> /me is mildly surprised to learn there is no standard Unix text tool
> to give the intersection of two files.
>
> -- Ben
>   
I believe 'comm -12 file1 file2' will come close to giving you an
intersection of two [sorted] files.

--Bruce