FreeDOS is a complete, free, DOS-compatible operating system that you can use to play classic DOS games, run business software, or develop embedded systems. Any program that works on MS-DOS should also run on FreeDOS.
FreeDOS founder Jim Hall created this handy cheat sheet of useful FreeDOS commands, including an introduction to DOS batch scripts.

https://opensource.com/downloads/freedos-comm … nds-cheat-sheet