tomsrtbt is “The most Linux on one floppy disk” for: rescue
recovery panic & emergencies tools to keep in your shirt
pockets whenever you can’t use a hard drive.
The tomsrtbt floppy on booting uncompresses into an 8 MB RAM
disk. It is possible to modify tomsrtbt to load in only 4 MB of
RAM.
tomsrtbt is an example of a very tiny GNU/Linux
distribution.