This is a tarball of the CDlinux development system. It's not bootable. You can use it together with a working CDlinux system: 1) Boot CDlinux. 2) Untar the tarball as root: # tar -C /media/SomeWhere-1 -axpf /media/SomeWhere-2/devel-x.y.z.tar.xz 3) Then chroot: # /media/SomeWhere-1/ch-root