One way to get the login prompt is through something called VT-2, or “virtual terminal 2”. NOTE: Before following these instructions, remember to put your device into Developer Mode. The command prompt is built in to your device! If you‘re a Linux hacker, you probably know that Google Chrome OS is built on top of Linux and you’re wondering how you can jailbreak your device so you can get to a command prompt. However, as long as you don’t crack open the case, you shouldn‘t be able to do anything that can’t be undone by recovery (software). NOTE: If you‘ve made changes to the rootfs filesystem while in developer mode, you may have to use the recovery process to restore your device to its factory condition.
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Devices without keyboard (tablet): Use the Volume-Up and Volume-Down keys to select the Enable OS Verification option.Device with keyboard: Press the Spacebar at the firmware screen.To restore your device to Normal Mode (i.e., disable Developer Mode), reboot your device and perform the following action: You can tell that you're in Developer Mode if you see one of these screens when you turn the device on: Please follow the link to read more details about blocked Developer Mode. If you’re encountering issues putting your device into Developer Mode, it's possible that your device administrator has blocked Developer Mode access on your device. It also gives you access to a “root” shell. Specifically, it makes the “verified boot” that's built-in to your hardware a little bit more lax, allowing your hardware to run custom (non-Google-signed) images. NOTE: Putting your device into developer mode inherently makes it a little less secure. Caution: Modifications you make to the system are not supported by Google, may cause hardware, software or security issues and may void warranty.