Ubuntu's system menu provides the option of a power-off button in a drop-down menu, in the top right corner of the desktop.
By clicking the power button, a dialogue box with 3 options will appear.
You will be able to make a choice in 60 seconds after 60 seconds system will shut down automatically.
There are two ways to shutdown #Ubuntu #Linux.
Go to the upper right corner and click the drop down menu.
You'll see the shutdown button here.
You can also use the command 'shutdown now'.