rsjoaoinitrd
The initial RAM disk (initrd) is an initial and temporary root file system mounted before the real root file system is available.
The kernel mounts initrd as part of the boot process to load the modules to make the real file systems available.
The initrd contains a minimal set of directories and executables, such as the insmod tool to install kernel modules into the kernel, to build the real file system.
neonbug 