Is a checksum a good way of determining if a file/string of text is the same from machine to machine?

It depends on the algorithm. If you are using a multibyte (>8 bit) checksum that uses integer (two's complement) math, then you will get different results depending on the endianness of the machine.

It depends on the algorithm. If you are using a multibyte (>8 bit) checksum that uses integer (two's complement) math, then you will get different results depending on the endianness of the machine. This is why a lot of network checksum algorithms use one's complement math instead of two's complement.

If both machines are the same OS and archtecture, you should be OK (unless your algorithm does something really weird).

Yes, as long as you make sure you are using the same checksum algorithm, it will be fine.

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