It would be great to see this fixed in an upcoming release of Ubuntu. I had the same problem and applied Mark Nieweglowski's fix here - https://github.com/stuartraetaylor/bsdmainutils-look
$ ./look -bf $(echo -n "P@ssw0rd" | sha1sum | cut -d' ' -f1) pwned-passwords-sha1-ordered-by-hash-v4.txt 21BD12DC183F740EE76F27B78EB39C8AD972A757:51259 There's also an alternative approach here - https://www.tablix.org/~avian/blog/archives/2018/10/checking_passwords_against_haveibeenpwned_com/ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/510613 Title: look(1) can't open bigfiles To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bsdmainutils/+bug/510613/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs