You may wait for seconds to wait the OS fully boot up
Press Alt+F1/F2/F3 to switch terminal. Press Ctrl+C to interrupt. Press Ctrl+L to clear the screen.
Program: cat, grep, ls, piano, write, fish, pingpong, hello, counter, testprint, sigtest
Piano Usage: Press the NumLock Once, then the keyboard switches to piano.
Write: Append the text to the file, only regular file (eg. frame0.txt). Usage: write FILENAME CONTENT

For more combinational keys and technical info, please refer to the Technical Overview page.
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Piano function can be only used here