Linux terminal is very handy tools which helps you to do various complicated task with just a simple command line. Those who are new to Linux termnal or shell command you can check the basic command for beginner user. I have also discussed previously about installing and uninstalling application for Ubuntu user and the proper 4 ways of using wget command which is very useful for Linux user. Here is a quick list of command to shut down you computer using Ubuntu Linux terminal.
sudo shutdown halt
sudo shutdown -h now
We are using sudo in this operation because we need super user privileged.
To know more about this command use following command in your terminal.