do you mean partition? and if so, depending on what distro of linux you use, there should be a way to partition your disk within the install, i know redhat can do everything but resize, mandrake does everything, gentoo does it all, as does slackware

and i believe knoppix also has an fdisk (non graphical) and cfdisk (graphical) partition system

to use it with knoppix just boot up, get into a root terminal and type cfdisk