BG-Rescue Linux
Very small RESCUE LINUX system which boots from usb-stick or cdrom
... or to facilitate the installation of a recent Debian oder Ubuntu Linux via debootstrap.
All the relevant major filesystems and many network cards are supported as well as mounting samba (cifs) and nfs shares over network. A wide range of disk- and filesystem utilities as well as strong compression tools are integrated, including a 64bit version of lrzip. A graphical frontend (ytree) is also included.