Switching to the text boot screen is useful if you suspect that the system startup process is not proceeding normally. The text screen might contain informational messages or a request for user input. Switching to the text boot screen has no impact on the boot sequence, other than how the information is displayed on the screen. Initialization of the operating system continues and completes as normal.
To switch to a text boot, press any key a few seconds after the GUI boot screen appears and the progress animation begins. Note that after switching from the GUI boot to a text boot, you cannot switch back to the GUI boot screen.