Extract file from tar home/

[Mike McCarty]

Rick Stevens wrote:
> 
> The j option tells tar to use bzip2 instead of gzip.  It compresses
> tighter, at a commensurate increase in CPU load.

It compresses _some_ files more than gzip. IME, most files.
It's easy to prove that there is some file which bzip makes
larger than the original, and that's unlikely to be one which
gzip also makes larger. So, with probability one, there is
a file which gzip does better than bzip2.

Mike
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