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Hey guys I was looking to install Ubuntu on my Acer Chromebook 13 (CB5-311-T1UU) in the way outlined in on the comment made on this thread:

True Ubuntu on Chromebook ARM (samsung)

It appears that you can't fully remove ChromeOS from a Chromebook (well, you can but it really struggles) but you can make it dual boot and make it boot into Ubuntu by default. I'll show you the last method.

First make a backup of all you local files because everything stored locally will be deleted by entering developer mode.

Press and hold the Esc and Refresh keys together, then press the Power button (while still holding the other two keys). This will reboot your Chromebook into Recovery Mode.

When you get the yellow screen with the exclamation mark hit Ctrl+D (This will bring up a prompt asking if you want to turn on Developer Mode.) Press Enter (this will take about 15 to 20 min. You'll get a screen with a red exclamation mark but leave it be until it reboots into ChromeOS).

Turn it on but do not login. Make sure you have a WiFi or Ethernet connection configured at this point. 3G/4G is not recommended. Press Ctrl+Alt+ ( is the forward arrow where the F2 key would be on a PC). Do not use the normal Ctrl+Alt+ method to get a shell. Use the Ctrl+Alt+ method while no one is logged in.

Login as user chronos, no password is needed.

As the chronos user and without having changed directories or run other commands, run:

curl -L -O http://goo.gl/s9ryd; sudo bash s9ryd (There is a new script with a new link. If you still want to use the old version you'll have to replace the new link with the old link) curl -L -O http://goo.gl/9sgchs; sudo bash 9sgchs...

But it did not do anything when I pressed CTRL + L.

Does anyone know if there is a specific build for the Acer Chromebook 13?

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    Thank you for including instructions how you tried to install ChrUbuntu. I have been told in the past by other users that contrary to Crouton this uses the Ubuntu Linux kernel, which is not exactly true as it looks to me reading through the script. You will be running an old device specific kernel that only Google or the manufacturer can update. It's therefore a good idea to keep ChromeOS, if updates will ever be published. This is the same if not worse than bugged WLAN router firmware. This time you add a desktop GUI on top but leave the ever growing amount of kernel vulnerabilities unfixed.
    – LiveWireBT
    Feb 4, 2016 at 2:45

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From reading your post, I don't think that post mentioned pressing Ctrl+L. The post mentioned pressing Ctrl+D and later on mentioned running the command curl -L -O http://goo.gl/s9ryd; sudo bash s9ry (by typing it on the command line and confirming with Enter)

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This is Chromebook Specific from http://svn.clifford.at/handicraft/2014/chrbook13/README

This is the script I have used to install Ubuntu on my Acer Chromebook 13 CB5-311-T6R7 on 2014-12-12. The Chrome OS version pre-installed on the Chromebook was:

Version 39.0.2171.94
Platform 6310.61.0 (Official Build) stable-channel nyan_big
Firmware Google_Nyan_Big.5771.63.0

I am now running a dual-boot configuration with Chrome OS and Ubuntu. To boot into ubuntu I run "sudo ubuntu" in a Chrome OS Crosh shell session.

Here is a short write-up of te install procedure. I write this a few days after the fact, so it is possible that I get some of the details wrong..

This tutorial is based on the modified chrubuntu installer posted by reddit user arm000: http://www.reddit.com/r/chrubuntu/comments/2hhb31/

This script installs a basic ubuntu system and also the NVidia drivers the Tegra K1 processor and its Kepler GPU.

The script in this directory is a slightly modified version of the original script. Compare chrubuntu.sh and chrubuntu.sh.orig for details.

=> Reinstall Chrome OS in Developer Mode

This sound complicated but is in fact really easy. Simply press

esc + refresh (f3) + power

this will reboot. On the boot screen press Ctrl + D, then Ctrl-D again and then ENTER. This will re-install Chrome OS in dev mode.

When Chrome OS is in dev mode there is a long delay on each bootup. Simply press Ctrl-D on the boot screen to skip the delay.

=> Repartition MMC card

Open a Chrome window, press Ctrl + Alt + T to open a terminal window. Enter the following commands:

shell
cd ~/Downloads
wget http://svn.clifford.at/handicraft/2014/chrbook13/chrubuntu.sh
sudo bash chrubuntu.sh

This will ask you how much space you would like to reserve for Ubuntu. I chose 16 GB. After changing the partition table the script will reboot the device. The boot loader will then recreate the chrome os partition used for user content on the smaller partition, leaving the newly created partition for ubuntu untouched.

==> Installing Ubuntu

Once again, open a Chrome window, press Ctrl + Alt + T to open a terminal window. Enter the following commands:

shell
cd ~/Downloads
wget http://svn.clifford.at/handicraft/2014/chrbook13/chrubuntu.sh
sudo bash chrubuntu.sh

This time the script auto-detects that the target partition already exists and installs ubuntu.

Next install the launcher:

wget http://svn.clifford.at/handicraft/2014/chrbook13/ubuntu.sh
sudo mkdir -p /usr/local/bin
sudo cp ubuntu.sh /usr/local/bin/ubuntu
sudo chmod +x /usr/local/bin/ubuntu

Now you can boot into ubuntu by running "sudo ubuntu"

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