Hi Michael! As I just learned from this discussion http://unix.stackexchange.com/questions/267335/how-can-i-check-that-two-input-values-are-correct-in-a-bash-script the -a and -o operators of test(1) are marked obsolescent: http://pubs.opengroup.org/onlinepubs/9699919799/utilities/test.html#tag_20_128_16 Yet the Linux man pages don't contain a hint to that. Cheers, Martin -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html