Flash firmware issues (hp pro c640 i5 10310u)

Hi, i cant flash firmware, after this step " 1. Press Ctrl + Alt + F2 (2nd button to the right of esc) to enter a shell" take me to developer console where i cant paste this sequence “cd; curl -LO mrchromebox.tech/firmware-util.sh && sudo bash firmware-util.sh” , even when i try to type it manually it doesnt work , there is also somehting like “localhost login” next to what i typed.

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ok i found something, you had to type chronos and press enter, next to localhost login then write “cd; curl -LO mrchromebox.tech/firmware-util.sh && sudo bash firmware-util.sh” and enter,cuz paste is impossible or i dont know how to do it.

Type chronos and press Enter.