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126 lines
8.1 KiB
HTML
126 lines
8.1 KiB
HTML
<!DOCTYPE html>
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<html lang="en" prefix="og: http://ogp.me/ns#">
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<head>
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<meta charset="utf-8"/>
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<title>Install | GrapheneOS</title>
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<meta name="description" content="Installation instructions for GrapheneOS, a security and privacy focused mobile OS with Android app compatibility."/>
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<meta name="theme-color" content="#212121"/>
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<meta name="viewport" content="width=device-width, initial-scale=1"/>
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<meta property="og:title" content="GrapheneOS install documentation"/>
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<meta property="og:description" content="Installation instructions for GrapheneOS, a security and privacy focused mobile OS with Android app compatibility."/>
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<meta property="og:type" content="website"/>
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<meta property="og:image" content="https://grapheneos.org/graphene.png"/>
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<meta property="og:image:alt" content="GrapheneOS logo"/>
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<meta property="og:url" content="https://grapheneos.org/install"/>
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<meta property="og:site_name" content="GrapheneOS"/>
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<link rel="stylesheet" href="/grapheneos.css?4"/>
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<link rel="manifest" href="/manifest.webmanifest"/>
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<link rel="canonical" href="https://grapheneos.org/install"/>
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</head>
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<body>
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<nav>
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<ul>
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<li><a href="/">GrapheneOS</a></li>
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<li class="active"><a href="/install">Install</a></li>
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<li><a href="/build">Build</a></li>
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<li><a href="/usage">Usage</a></li>
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<li><a href="/releases">Releases</a></li>
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<li><a href="/source">Source</a></li>
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<li><a href="/donate">Donate</a></li>
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<li><a href="/contact">Contact</a></li>
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</ul>
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</nav>
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<div id="content">
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<h1>Install</h1>
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<h2>Prerequisites</h2>
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<p>You should have at least 2GB of free memory available.</p>
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<p>You need the unlocked variant of one of the supported devices, not a locked carrier
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specific variant.</p>
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<p>You need an updated copy of the <code>fastboot</code> tool and it needs to be
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included in your <code>PATH</code> environment variable. You can run <code>fastboot
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--version</code> to determine the current version. It should be at least
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<code>28.0.0</code>. Don't proceed with the installation process until this is set up
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properly in your current shell. A very common mistake is using an outdated copy of
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<code>fastboot</code> from a Linux distribution package not receiving regular updates.
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Make sure that the <code>fastboot</code> found earliest in your <code>PATH</code> is
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the correct one if you have multiple copies on your system. You can run <code>which
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fastboot</code> to determine where the tool being used is coming from. Older versions
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do not have support for current devices. Very old versions of <code>fastboot</code>
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from several years ago are still shipped by Linux distributions like Debian and lack
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the compatibility detection of modern versions so they can soft brick devices.</p>
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<h2>Enabling OEM unlocking</h2>
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<p>OEM unlocking needs to be enabled from within the operating system.</p>
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<p>Enable the developer settings menu by going to Settings ➔ System ➔ About phone and
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pressing on the build number menu entry until developer mode is enabled.</p>
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<p>Next, go to Settings ➔ System ➔ Advanced ➔ Developer settings and toggle on the
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'Enable OEM unlocking' setting. This requires internet access on devices with Google
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Play Services.</p>
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<h2>Unlocking the bootloader</h2>
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<p>First, boot into the bootloader interface. You can do this by turning off the
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device and then turning it on by holding both the Volume Down and Power buttons.</p>
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<p>The bootloader now needs to be unlocked to allow flashing new images:</p>
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<pre>fastboot flashing unlock</pre>
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<p>The command needs to be confirmed on the device.</p>
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<h2>Obtaining factory images</h2>
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<p>The initial install will be performed by flashing the factory images. This will
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replace the existing OS installation and wipe all the existing data.</p>
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<p>You can download the factory images from <a href="/releases">the releases page</a>.</p>
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<p>Verify the official factory images using the GPG signature:</p>
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<pre>gpg --recv-keys 65EEFE022108E2B708CBFCF7F9E712E59AF5F22A
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gpg --verify blueline-factory-2019.04.01.19.zip.sig blueline-factory-2019.04.01.19.zip</pre>
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<p>When this signing key is replaced, the new key will be signed with it.</p>
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<h2>Flashing factory images</h2>
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<p>Next, extract the factory images and run the script to flash them. Note that the
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<code>fastboot</code> command run by the flashing script requires a fair bit of free
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space in a temporary directory, which defaults to <code>/tmp</code>:<p>
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<pre>unzip blueline-factory-2019.04.01.19.zip
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cd blueline-pq2a.190405.003
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./flash-all.sh</pre>
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<p>Use a different temporary directory if your <code>/tmp</code> doesn't have enough
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space available:</p>
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<pre>mkdir tmp
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TMPDIR="$PWD/tmp" ./flash-all.sh</pre>
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<p>Wait for the flashing process to complete and for the device to boot up using the
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new operating system.</p>
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<p>You should now proceed to locking the bootloader before using the device as locking
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wipes the data again.</p>
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<h2>Locking the bootloader</h2>
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<p>Locking the bootloader is important as it enables full verified boot. It also
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prevents using fastboot to flash, format or erase partitions. Verified boot will
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detect modifications to any of the OS partitions (vbmeta, boot/dtbo, product, system,
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vendor) and it will prevent reading any modified / corrupted data. If changes are
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detected, error correction data is used to attempt to obtain the original data at
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which point it's verified again which makes verified boot robust to non-malicious
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corruption.</p>
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<p>Reboot into the bootloader menu and set it to locked:</p>
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<pre>fastboot flashing lock</pre>
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<p>The command needs to be confirmed on the device since it needs to perform a factory
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reset.</p>
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<p>Unlocking the bootloader again will perform a factory reset.</p>
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<h2>Disabling OEM unlocking</h2>
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<p>OEM unlocking can be disabled again in the developer settings menu within the
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operating system after booting it up again.</p>
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<h2>Replacing GrapheneOS with the stock OS</h2>
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<p>Installation of the stock OS via the stock factory images is the same process
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described above. However, before locking, there's an additional step to fully revert
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the device to a clean factory state on modern devices with Android Verified Boot 2.0
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(AVB) like the Pixel 2, Pixel 2 XL, Pixel 3 and Pixel 3 XL. It isn't necessary for
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devices with legacy verified boot like the Pixel and Pixel XL.</p>
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<p>The GrapheneOS factory images flash a non-stock Android Verified Boot key which
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needs to be erased to fully revert back to a stock device state. After flashing the
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stock factory images and before locking the bootloader, you should erase the custom
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Android Verified Boot key to untrust it:</p>
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<pre>fastboot erase avb_custom_key</pre>
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</div>
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<footer>
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<a href="/"><img src="https://grapheneos.org/graphene.png" width="697" height="599" alt=""/>GrapheneOS</a>
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<div id="social">
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<a href="https://twitter.com/GrapheneOS">Twitter</a>
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<a href="https://github.com/GrapheneOS">GitHub</a>
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</div>
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</footer>
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</body>
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</html>
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