While I'm not disagreeing, there's more: if you are likely to see the error many times it should be short (compare with the variable name length). I think "comm

While I'm not disagreeing, there's more: if you are likely to see the error many times it should be short (compare with the variable name length). I think "command not found" is by itself a pretty good message because it is clear and so frequent that deserves a short message. But if it occurs in the middle of a shell script I would like to have the offending line as well.