This means that they can be converted to PostScript or PDF. There’s no portable way to do this with the “man” command, but on most Linuxes you can use “man -t” and on a system using Mandoc you can use “man -T pdf”.
Likewise, for HTML, “man -H” is not strictly portable, but only works on certain versions of Linux; a Mandoc system would let you use “man -T html”. (The only strictly portable, as in “POSIX specified,” flag for man is -k.)
Honestly it might be better to just get used to using an existing webpage for your distribution. For example, OpenBSD’s web manpage database (based on Mandoc) is very nice: http://man.openbsd.org/ls.1
This means that they can be converted to PostScript or PDF. There’s no portable way to do this with the “man” command, but on most Linuxes you can use “man -t” and on a system using Mandoc you can use “man -T pdf”.
Likewise, for HTML, “man -H” is not strictly portable, but only works on certain versions of Linux; a Mandoc system would let you use “man -T html”. (The only strictly portable, as in “POSIX specified,” flag for man is -k.)
Honestly it might be better to just get used to using an existing webpage for your distribution. For example, OpenBSD’s web manpage database (based on Mandoc) is very nice: http://man.openbsd.org/ls.1