At the boot prompt, choose a kernel image to boot. gives a list of the names of available kernels. You may provide many parameters to the boot. * **** MOST IMPORTANT: "s" gives single-user mode. The label "Single_user" is equivalent to "Stable s". * For other parameters, login on single-user mode, and type "man bootparam" and "man init". * The labels "Stable", "Test", and "Safe" refer to the latest system that appears to be stable, a system to test, and an old system that is really safe, respectively. * The same systems are also labeled by their numerical suffixes, appended to "/vmlinux-" to produce the file of the kernel image. **** I REPEAT: "Stable s", or "Single_user" to get a single-user tty login.