Booting Ubuntu For The First Time
After POST, but before loading the operating system, you are presented with the Ubuntu boot loader: GRUB or “GRand Unified Bootloader." If Ubuntu is the only operating system, you will have three choices. The first option is Ubuntu, which will automatically boot in 10 seconds. The second choice is “recovery mode,” which is like Windows “safe mode." The third choice runs a random-access memory test. If you are dual-booting with Windows, then this operating system will be your fourth option. You can wait 10 seconds to boot into Ubuntu or use the arrow keys to manually select another option and press Enter.
Before getting to the desktop, you will be presented with the login screen. If you chose "Log in automatically" in step five of seven during the installation, you will skip the login screen and go directly to the desktop. You should now begin kicking yourself if you did not write down or remember your exact username and password. Without them, you'll need to redo the entire installation because you won't be able to get into the desktop. If you followed instructions and have your username and password, type in the username and press Enter. Next, type in your password and press Enter to get to the desktop.