What did Google do to its Linux terminal on Pixel phones

Google made notable changes to its Linux terminal capabilities on Pixel phones, fundamentally altering how users interact with Linux environments on Android devices. Prior to Pixel 6, users primarily relied on Termux, a community-driven app that provided a Linux terminal experience within Android's user-space. However, Google tightened Android's security policies, particularly with stricter SELinux enforcement and the introduction of a 'phantom process killer' in Android 12, which disrupted Termux's functionality. These changes made it more challenging to run Linux tools and processes directly on Android.

With the Pixel 6 and later devices, Google introduced the Android Virtualization Framework (AVF), mark a significant shift in approach. AVF enables Linux environments to run in a protected virtual machine (pVM) rather than within Android itself. This virtualization layer allows users to run full Linux distributions, like Debian or Fedora, with their own kernels and isolated hardware access. The AVF prioritizes security and stability by decoupling Linux operations from the Android OS, ensuring no risk to the core system.

Google has not positioned this feature as a consumer-facing tool but rather as a developer-centric option accessible via Developer Mode and adb commands. This approach emphasizes isolation over integration, moving the Linux terminal experience from the application layer to the hypervisor layer. While this shift offers a more robust and secure environment for developers, it also raises the barrier to entry, requiring technical expertise to set up and use.