Shut Down Quickly - A stop job is running

In systemd based systems, such as debian 8 and ubuntu 16.04, I have this issue whereby the machine will refuse to shut down if I forgot to stop my openvpn connection before sending the command to shut down.

The command I use to start my openvpn connection is:

sudo openvpn --config client.conf --script-security 2

Is there a way I can change the command so systemd knows that it's okay to terminate it more quickly when the system is shutting down? Perhaps the alternative is to change systemd's timeout period to be much shorter? I would rather avoid any type of aliasing of my poweroff, halt, reboot, and shutdown commands.

I have used systemd for 5 months. Sometimes I get this problem. To reduce the delay from the default value 90s (1min30s), it is in the /etc/systemd/system.conf file:

#DefaultTimeoutStartSec=90s
#DefaultTimeoutStopSec=90s

Uncomment these line and change to any value you want. This solution just reduce time you have to wait. You should check your virtualbox daemon.

Second solution is install watchdog and enable it. It works for many people but it not works for me.

P/s: If you want to force poweroff. Let have a look at systemctl manpage.