[nmglug] Define 'forever'

[Mark Galassi]

    Sam> Circumstances arranged themselves such that today I needed to
    Sam> diff a Multi-Gigabyte tarball on a DVD to a copy of it on an
    Sam> NFS share.  Before I started it going I said to myself, "This
    Sam> is going to take forever."

Hmm: did you use diff or cmp?  cmp might be faster on binaries, but
all it does is tell you at which byte they first differ.

Running "sum" on each can also tell you if they differ.