GNU cat is on the naughty list, supporting --help but not -h. less is the same (and is not part of GNU). edit Looks like the GNU echo, sort, and uniq programs

GNU cat is on the naughty list, supporting --help but not -h. less is the same (and is not part of GNU). edit Looks like the GNU echo, sort, and uniq programs are the same. GNU has an official policy endorsing --help but not -h. [0] Also related: --version should print the version numbers (and perhaps build details) of the software, and immediately terminate. -v lacks the (at least somewhat) universal meaning of -h, though. Some commands, such as curl, use -v as shorthand for --verbose rather than --version, but all commands should support --version. I believe Java HotSpot used to use -version, supporting neither -v nor --version. Now it supports both --version and -version, but not -v. [0] https://www.gnu.org/prep/standards/html_node/_002d_002dhelp.html https://www.gnu.org/prep/standards/html_node/_002d_002dhelp....