Trying to install mrchromebox in a Asus chromebook C300S

am trying to install mrchromebox in a Asus chromebook C300S according to https://mrchromebox.tech/#devices Asus Chromebook C300 QUAWKS EOL ✅ screw it seems to be supported. I followed the instructions from [code] From the Developer Console from the localhost login: cd; curl - LOK mrchromebox.tech/firmware-util.sh && sudo bash firmware-util.shafter imputing the info it returns me to the Developer Console Am I doing something incorrectly ? I appreciate any help thank you
I also tried enable_dev_usb_boot I inserted a USB flash drive with a bootable version of Ubuntu 24.04 imputed ctrl-U it did not install

you’re logging in first, as per the instructions – right?

you can’t run commands from a login prompt…

How do I login here in the developer console ?

Complete instructions are provided at MrChromebox.tech

Please read them.