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tomsrtbt (pronounced: Tom's Root Boot) is a very small Linux distribution—MiniLinux. It is short for "Tom's floppy which has a root filesystem and is also bootable (bootfloppy)." The author touts it as "The most GNU/Linux on one floppy disk", containing many common bash commands useful for system recovery (Linux and other operating systems) and for creating Linux machines without a hard disk. It also features drivers for many types of hardware, and network connectivity.

It can be created from within Microsoft Windows running in MS-DOS mode or Linux, either by formatting a standard 1.44MB floppy disk as a higher density 1.72MB disk and writing its image to the disk, or by burning it as a bootable CD. It is capable of reading and writing the filesystems of many operating systems, including ext2/ext3 (used in Linux), FAT (used by DOS and Windows), NTFS (used in Windows NT, 2000, and XP) and Minix (used by the Minix operating system).

Many of the utilities on tomsrtbt are written in the Lua programming language.

The last version 2.0.103 was released on May 2002, however the T2 SDE is working on a equivalent target to mimic tomsrtbt with updated kernel, compiler and utility versions and also utilizing LUA.
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