shutdown
FreeBSD-Linux-Windows
How to poweroff your machine from the command line
# your probably need privileges to shutdown your machine
# FreeBSD
shutdown -p now
# Linux
shutdown -P now
# Windows - force shutdown
shutdown /r /f /t 0
# your probably need privileges to shutdown your machine
# FreeBSD
shutdown -p now
# Linux
shutdown -P now
# Windows - force shutdown
shutdown /r /f /t 0