On Wed, 18 Oct 2017 at 22:10:27 -0400
Bryan Smith <[email protected]> wrote:

> Remember, in a multi-user solution, taking things off-line may be
> impossible.

  It might be rude, far from impossible!  ;-)

shutdown -h 15 'Dear users, it breaks my heart informing you this server is
going down in a few minutes. I understand that, being lunch-time, you will
probably read this message too late to logout in an orderly fashion, but
believe me it was really needed. For every inquiry about this shutdown ask my
boss - he knows and he approved. Yours sincerly, your BOFH.'

  I understand your point, but we're talking of non-trivial sysadmanship,
that to me goes well beyond LPIC-101 scope.

-- 
Alessandro Selli http://alessandro.route-add.net
VOIP SIP: [email protected]
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