[Jay Freeman] has a rather exhaustive tutorial on how to set up a Debian environment on your T-Mobile G1. The first major issue with this is that getting root level access through telnetd is being patched. It certainly is a security issue that needs to be fixed, but a user shouldn’t have to root their own phone to begin with. While the G1 comes with some Linux tools, they’re limited. [Jay]‘s goal was to create a familiar Debian environment on the phone. It takes a few tricks, but if you’re familiar with the command line, you shouldn’t have any problems. Debian already has ARM EABI support, so creating a working image isn’t a problem. The image file is stored on the SD card and mounted using the loopback device. The G1′s kernel has module support turned on, so [Jay] created an ext2 and unionfs kernel modules. [Benno Leslie]‘s Android version of busybox is used to perform the actual mounting. Once mounted, you just need to chroot into the environment to start playing with native Linux apps. [Jay] takes this a step further by using unionfs to make the Android and Debian environments share the same root. This is really a great how-to and it’s nice to know that modules can be added to the kernel.