sh is, but not the location. > Applications should note that the standard PATH to the shell cannot be assumed to be either /bin/sh or /usr/bin/sh, and should b

sh is, but not the location. > Applications should note that the standard PATH to the shell cannot be assumed to be either /bin/sh or /usr/bin/sh, and should be determined by interrogation of the PATH returned by getconf PATH, ensuring that the returned pathname is an absolute pathname and not a shell built-in. https://pubs.opengroup.org/onlinepubs/9699919799/utilities/sh.html#tag_20_117_16 https://pubs.opengroup.org/onlinepubs/9699919799/utilities/s... However, in my experience, I don't recall seeing any POSIX or POSIX like system that didn't have /bin/sh.