Almost none. Early Unix uses a rather informal style to report errors, like those debug messages written by a casual programmer. Nowadays, at least the GNU tool

Almost none. Early Unix uses a rather informal style to report errors, like those debug messages written by a casual programmer. Nowadays, at least the GNU toolchain uses a more rigorous style to report errors formally. BSD's messages are more concise, but still have more details. e.g, compare %make love Make: Don't know how to make love. Stop. and (shell doesn't matter here, GNU make matters) sh-4.4$ make love make: *** No rule to make target 'love'. Stop. There's still a funny one, though. In the old Unix, we had % ar m God ar: God does not exist But now, $ ar m God ar: creating God