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I tried to install Ubuntu on my ACER C7 Chromebook and I am using it now. I want to change it as my default OS but as I type the command:

sudo cgpt add -i 6 -P 5 -S 1 /dev/sda

and then "password user:" appears and when I tried to type USER as the password, it doesnt work. I mean I cant type it's as if the keyboard is not working. I did this twice actually but got the same result. Please please please help me! T__T Thank you!

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not sure where you are typing the password, but most of time you are typing a password into the terminal, it won't show any indication that you have typed anything on the screen. you just need to type the password out and hit enter... – Luis Flores III Oct 1 '13 at 14:01
Yes. That's exactly what I did but its the same. :( – Clainhie Claine Oct 1 '13 at 14:05
Yeah, i'm not really sure then, I don't have a setup like yours. I'm sorry. :0( – Luis Flores III Oct 1 '13 at 14:07
OK. :/ Thank you for answering anyways ^____^ – Clainhie Claine Oct 1 '13 at 14:08

May be you can try grub-customizer with a live-usb ubuntu. See also the answer in this question

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