I’ve noticed there is quite some online manpage websites, but every time when I needed to refer to a certain page, it’s hard to choose, because I had no idea which one would be reliable.

A manual page may have different sources, for example, the sed(1) on Linux and on *BSD, they are apparently from different sources. On GNU/Linux, it will be the GNU Sed; On *BSD, it will be the BSD version, so the contents will be different as well. Also, even Linux distributions may make small changes on special occasions, for instance, gcc(1) on Gentoo, there is a couple of notes added regarding the changes were made by Gentoo developers.

Some sites, I don’t have a clue who is providing those pages, and definitely no idea if it would still be accessible tomorrow. I don’t want to have a dead link if I can avoid.

Even some of them I don’t fear they would disappear someday, but it doesn’t seem to be enough for reference. I wish someone would create one not only having the versions, but also having the anchor to specific line like VCS repository web viewing, section anchor is just not enough.

The following is the list, I split them by the systems and different features, or the tables would look squashed.

1   Lists

1.1   Linux

Website Source Maintainer
man7.org Linux man-pages project Michael Kerrisk
Debian Hypertext Man Pages Debian Debian
man.cx Debian testing Unknown
Fedora Manpages Fedora Finnbarr P. Murphy
Ubuntu Manpages Ubuntu Ubuntu
linux.bar Unknown Unknown
die.net Unknown Unknown
Linux Man Pages Online Unknown Hurricane Electric

1.2   *BSD

Website Source Maintainer
FreeBSD FreeBSD FreeBSD
OpenBSD OpenBSD OpenBSD
manpagez Mac OS X Unknown
Mac OS X Manual Pages Mac OS X Apple Inc.
1.2.1   Notes
manpagez

also includes

  • Gtk-Doc
  • Info pages

1.3   Other Unix-like

Website Source Maintainer
The Manual Page Library Various Unknown
1.3.1   Notes
The Manual Page Library

It includes:

  • Plan 9
    • Plan 9
    • Plan B
    • 9front
    • Infrerno
    • Octopus
  • Unix

2   Features

2.1   Linux

2.1.1   Basic features
Website Monospace Section Link Xref link Apropos Search
man7.org Yes Yes Yes No
Debian Hypertext Man Pages Yes No Yes Yes
man.cx No Yes No No
Fedora Manpages Yes Yes Yes No
Ubuntu Manpages No Yes Yes No
linux.bar Yes Yes Yes No
die.net No No No No
Linux Man Pages Online Yes No Yes No
2.1.2   Specifics
Website Architectures Versions Languages
man7.org No No No
Debian Hypertext Man Pages Yes Yes Yes
man.cx No No Yes
Fedora Manpages No Yes No
Ubuntu Manpages No Yes No
linux.bar No No No
die.net No No No
Linux Man Pages Online No No No
2.1.3   Searches
Website Search Apropos Search
man7.org Google No
Debian Hypertext Man Pages Yes Yes
man.cx Yes No
Fedora Manpages Google No
Ubuntu Manpages Google No
linux.bar No No
die.net Yes No
Linux Man Pages Online Yes No
2.1.4   Outputs
Website HTML ASCII PDF PS LATIN1
man7.org Yes No No No No
Debian Hypertext Man Pages Yes Yes Yes Yes Yes
man.cx Yes No No No No
Fedora Manpages Yes No No No No
Ubuntu Manpages Yes No No No No
linux.bar Yes No No No No
die.net Yes No No No No
Linux Man Pages Online Yes No No No No

2.2   *BSD

2.2.1   Basic features
Website Monospace Section Link Xref link
FreeBSD Yes Yes Yes
OpenBSD Yes No Yes
manpagez Partially No Yes
Mac OS X Manual Pages Yes No Yes
2.2.2   Specifics
Website Architectures Versions Languages
FreeBSD Yes Yes No
OpenBSD Yes Yes No
manpagez No No No
Mac OS X Manual Pages No No No
2.2.3   Searches
Website Search Apropos Search
FreeBSD Yes Yes
OpenBSD Yes Yes
manpagez Google No
Mac OS X Manual Pages No No
2.2.4   Outputs
Website HTML ASCII PDF PS LATIN1
FreeBSD Yes Yes Yes No No
OpenBSD Yes No No No No
manpagez Yes No No No No
Mac OS X Manual Pages Yes No No No No

2.3   Other Unix-like

2.3.1   Basic features
Website Monospace Section Link Xref link
The Manual Page Library Yes No Yes
2.3.2   Specifics
Website Architectures Versions Languages
The Manual Page Library No Yes No
2.3.3   Searches
Website Search Apropos Search
The Manual Page Library Yes No
2.3.4   Outputs
Website HTML ASCII PDF PS LATIN1
The Manual Page Library Yes No No No No