acpi shutdown code example

Example 1: kill pid

Find PID of process to kill with:
ps ax
Then just specify "kill PID" command as for example:
kill 16320
kill -9 16320 	#Force kill in case process is not answering.

Example 2: raspi emergency shutwodn

sudo shutdown -now
If it doesn't work. Pull the plug (it could damage your SD card but desperate
times call for desperate measures)