set a breakpoint in linuxrc script

check the md5 sum for linuxfs and iso files

enable limited linuxrc debugging

disable limited linuxrc debugging

puts kernel in debug mode

wait "delay" seconds before looking for the linuxfs file

pretend system has less memory

don’t install .deb files from the deb/ subdirectory

don’t load /etc files from the etc/ subdirectory

control kernel messages during bootstrap

control kernel messages at start of init

turn off many kernel messages

wait this many seconds before booting

the level of verbosity

wait "wait" seconds before running init