Chromebooks are laptops that instead of having a system like Windows or Gnu / Linux have Chrome OS as an operating system. Chrome OS is a Google operating system, but it is based on the Linux kernel and also comes with tools such as a bash or a partition manager.
These tools are usually hidden but if activated they can cause We can have other Gnu / Linux distributions and we can even do dualboot without having to erase the Chrome OS partition, for the most indecisive users.We can do all this thanks to the crouton tool, a program that allows us to install a Gnu / Linux distribution on any Chrome OS. To do this, we only have to activate the »Developer Mode» of the chromebook and once activated, we download Crouton and run it.
To activate the Chromebook developer mode we have to turn off the computer and with the screen raised, press the Power + ESC + Update buttons. We leave them pressed for a while and the chromebook will start in developer mode. Now we go to Crouton's website to download it and unzip it. Once we have it downloaded, click CTRL + ALT + T to open a terminal. Now in the terminal we write the following:
sh -e /Downloads/crouton -r list - will list supported distros
This will show us the entire list of distributions supported by the crouton tool. We look and we choose which distribution we want to install. Once chosen, then we write in the terminal:
sh -e /Downloads/crouton -e -r zesty -t gnome
In this case we have chosen zesty and Gnome as the desktop but we can choose Stretch and KDE if we want to have Debian 9 with KDE or any other combination. Once we have written all of this, crouton will start to install the second operating system and modify the grub and other files so that there is a dualboot. The process is simple for any user, don't you think?