The help output is written to stderr. It would be better if the help output was written to stdout instead. That would make it easier to grep for command-line options. A test on Fedora 38 $ rpm -qf /usr/bin/pasta passt-0^20230509.g96f8d55-1.fc38.x86_64 $ /usr/bin/pasta --help 2>&1 | grep -- --help -h, --help Display this help message and exit $ /usr/bin/pasta --help 2> /dev/null $
Patch at: https://archives.passt.top/passt-dev/20230604055001.619958-1-sbrivio@redhat.com/
Fixed in version 2023_06_25.32660ce