Thanks for providing the additional information. I've also forwarded this to the Debian maintainer, see the attached bug watch.
If jacksum 1.7.0-2 on Ubuntu 14.04 it is likely the issue was introduced since then, which should help pin-point exactly what is causing it. Since the version in 14.04 works, I've removed the trusty tag (the tags represent which releases contains the issue) ** Bug watch added: Debian Bug tracker #866755 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=866755 ** Also affects: jacksum (Debian) via http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=866755 Importance: Unknown Status: Unknown ** Tags removed: trusty ** Tags added: yakkety zesty -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1701028 Title: Jacksum -h option missing source help_en.txt To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/jacksum/+bug/1701028/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs