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breadcrumbs: Autotest Developer FAQ > chromium_link: Chromium chromium_os_link: Chromium OS home_link: Home page_name: ssh-test-keys-setup title: Setting up SSH Access to your test device. title_hdr: |

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In order to run the automated tests against your device you need to ensure it is running a Test Image and you have password-less SSH Access.

1. First make sure you have a Chrome OS Device with a Test Image installed.

• If you are a Google partner, please contact your Google representative for Google Storage access to our builds for for automated re-imaging of your test devices via the devserver (described below).
• Otherwise:
  • Download a test image from the public waterfall http://build.chromium.org/p/chromiumos/waterfall
  • Or build a test image.
    • http://www.chromium.org/chromium-os/developer-guide#TOC-Building-Chromium-OS
  • Once you have a test image, install it on your test device.
    • http://www.chromium.org/chromium-os/developer-guide#TOC-Installing-Chromium-OS-on-your-Device

2. Next, install the RSA keys to allow you SSH into the device.

• Download the testing RSA keys into ~/.ssh/ (on your test server).
  • You can get the key from the chromiumos checkout under chromiumos/src/scripts/mod_for_test_scripts/ssh_keys/testing_rsa
  • Or download from https://chromium.googlesource.com/chromiumos/chromite/+/master/ssh_keys
• Restrict the permissions on ~/.ssh/testing_rsa; SSH will ignore the file if the permissions are too open:

$ chmod 0600 ~/.ssh/testing_rsa

• Add an entry for your device in your ~/.ssh/config:

Host device
  HostName 172.22.168.233 # The IP address of the Chrome OS Device.
  CheckHostIP no
  StrictHostKeyChecking no
  IdentityFile %d/.ssh/testing_rsa
  Protocol 2
  User root

• Once you have done both steps verify you have password less login as root:

$ ssh device
Warning: Permanently added '172.22.168.233' (RSA) to the list of known hosts.
Last login: Mon Mar 17 14:21:30 PDT 2014 from 172.18.72.8 on ssh
localhost ~ # 

• If connecting to multiple test devices, you can share common config options in your ~/.ssh/config:

Host 172.22.168.* # The subnet containing your Chrome OS test devices.
  CheckHostIP no
  StrictHostKeyChecking no
  IdentityFile %d/.ssh/testing_rsa
  Protocol 2
  User root
Host device1
  HostName 172.22.168.233 # The IP address of the first Chrome OS Device.
Host device2
  HostName 172.22.168.234 # The IP address of the second Chrome OS Device.

Note: you can also reach your device via ssh if using a Dev image, but you will need to enable the debugging features on the setup screen after a flash or powerwash.