MD5SUM.EXE is the only checksum tool available on FreeDOS 1.3 RC5 but it is only available in a compressed form as a package on the Live CD and thus must be unpacked.
Could you add it to the freedos/bin folder in an unpacked usable form?
The reason I ask is because a checksum tool is very important for firmware updates and such, so it would be very useful if md5sum.exe was available on the LiveCD by default and usable without having to unzip and install it first.
The filesize of MDSUM.EXE in an unpacked form is only 30579 Bytes, so file size shouldn't be an issue.
For now, I added it to the Development build. However, I cannot promise it will remain "live" on the LiveCD for FreeDOS 1.3 Final. My guess is it will probably be there.
Thank you.