debug Get shells during process of booting for debugging
bootchart Create chart of booting sequence in /var/log/bootchart.tgz
forensic Do not touch any harddisks during hardware recognition
-serial Activate ttyS0 and start mgetty
+serial Activate ttyS0 and start a getty
grub Boot Grub bootloader (special all-in-one-image)
dos Boot FreeDOS
bsd Boot MirOS BSD