I have seen many articles and posts stating that a way to turn off the system via the terminal is issuing the
shutdown -h now command. It obviously works on my system, but it shuts down everything extremely fast. If I power off the system using Ubuntu's GUI, the Ubuntu splash screen comes up, and it takes much more time before it actually powers down. By safe I am referring to a shutdown that makes sure all read/write operations are completed before powering down and avoiding data corruption.
So is using the
shutdown command in the terminal actually a safe way to power off the system? If so, why does Ubuntu's shutdown menu take much longer to accomplish the same goal?