Zend certified PHP/Magento developer

I need to enable linux on crosh but I cannot

I want linux on my Lenovo ideapad flex 5 13itl6 chromebook and I tried in settings but it said i cannot so i tried crosh (Ctrl-Alt-T) and I tried Sudo cros config enable linux
cause I lokked it up and it said Error- Error unknown command "sudo" and I tried using the VT-2 shell and it did nothing so yeah… please help

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