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Oh bother!

It turns out that I didn't fully explain what I was trying to do. Jim's solution works for a single pair of strings that I wish to compare, however I actually have a file with pairs of...

An awk solution is great! Thanks Jim.

I've also just found cmp in the GNU DiffUtilities package, but yours is pretty much what I was looking for.

Hello,

I would like to find an efficient way to compare a pair of strings that differ at one position, and return the difference and position.

For example:

String1 123456789

String2...