As mentioned in the article: " This can be done with an empty file that's marked executable, and that's what it was in the earliest unix system libraries. "

As mentioned in the article: " This can be done with an empty file that's marked executable, and that's what it was in the earliest unix system libraries. " $ uname -sr OpenBSD 6.1 $ install -m 755 /dev/null /tmp/muhtrue && /tmp/muhtrue && echo yup yup not sure why it was ever switched.. probably the 'return 0;' version is cheaper than a shell fork? hmm..