Because of my problem with mouse-clicks being ignored in Ubuntu, I want to restart from the command-line. (I have an open Terminal, and the keyboard is not ignored.)
How do I restart a computer running Linux (or more specifically Ubuntu) from the command-line?
There's a few ways:
sudo reboot
sudo init 6
sudo shutdown -r now
If you've got freedesktop-compliant session manager, you can use DBus to invoke restart from inside the X session. The command goes:
dbus-send --system --dest=org.freedesktop.Hal --type=method_call \
--print-reply /org/freedesktop/Hal/devices/computer \
org.freedesktop.Hal.Device.SystemPowerManagement.Reboot int32:0
(this is probably more than necessary; works for me). I use this in a shell script. You don't need to run this from root, but you need to run it from inside an X session (f.e. in a terminal). You can find more on this topic at https://wiki.ubuntu.com/DebuggingGNOMEPowerManager
Occasionally, the usual (and preferred) reboot and shutdown commands don't work. I've seen this on a system with problems (which is why it needed rebooting).
You can trigger the "Magic SysRq" mechanism from the commandline:
echo b >/proc/sysrq-trigger
This is equivalent to alt-SysRq+b and will reboot the machine.
You may want to try "s" and "u" first to sync discs and unmount filesystems respectively.
I found this page on computerhope.com:
The command is reboot. There is also halt, poweroff & shutdown.
If you are working in Virtual Environment It will put hard disk on Standby Mode: sudo /sbin/shutdown -h now.
nothing wrong with any of the above, but you can also install gnome-do and enable the session management plugin, which lets you easily shutdown,reboot,suspend from gnome-do
