[CentOS] systemctl reboot -- server not accessible after reboot

Sun Oct 15 11:23:10 UTC 2017
Mike <1100100 at gmail.com>

cat /etc/centos-release:

CentOS Linux release 7.4.1708 (Core)

The bugzilla report does sound similar --- in one of the comments, a
user reports hang-up when trying remote reboot.