Bug#825981: failure message upon install

[積丹尼 Dan Jacobson]

>>>>> "MB" == Michael Biebl <biebl at debian.org> writes:

MB> Why don't you just use "systemctl halt" then? I will shut down your
MB> system but not actually power it off. Very useful if you want to read
MB> the messages on shutdown.

OK. But then how to poweroff when finished reading the messages?
Physically yank the plug? Yuck.