If we look at the initrd folder, we can see the following contents:
$ cd bootable/newinstaller/initrd $ ls -1F bin/ init* lib/ sbin/ scripts/
The content of initrd.img consists of a minimal Linux environment based on busybox. We can find busybox at bin/busybox and shared libraries required by busybox at lib/. There is an executable init file and a few folders inside the initrd folder. We know that the init process is the first process invoked by the kernel when the system starts. Android-x86 provides a separate init process to start the system inside initrd.img. This version of init is actually a shell script instead of a binary executable file:
This shell script will perform the tasks shown in the preceding figure: ...