AFAIK, mktemp is not part of POSIX. I use the POSIX documentation as my primary source of documentation when writing scripts. Most of the time, I have seen tha

AFAIK, mktemp is not part of POSIX. I use the POSIX documentation as my primary source of documentation when writing scripts. Most of the time, I have seen that the differences between the implementations are in the additions but not in the core functionalities that are described by POSIX. A nice entry to the POSIX documentation is being provided by this website: https://shellhaters.org https://shellhaters.org