linux.die.net man pages tend to be badly outdated. And you can't easily tell this is the case, because because they strip version information. For example, thi

linux.die.net man pages tend to be badly outdated. And you can't easily tell this is the case, because because they strip version information. For example, this one doesn't document the -B option, which was added in 2011(!): https://git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git/commit/?id=e53e8fb00970fc74 https://git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git/commit/... Better man page link: https://man7.org/linux/man-pages/man8/badblocks.8.html https://man7.org/linux/man-pages/man8/badblocks.8.html