in.nnrpd(8)
NAME
nnrpd - NNTP server for on-campus hosts
SYNOPSIS
nnrpd [ -r reason ] [ -s title padding ] [ -S host ] [ -t ]
DESCRIPTION
Nnrpd is an NNTP server for newsreaders. It accepts commands on its standard input and responds on its standard output. It is normally invoked by innd(8) with those descriptors attached to a remote client connection. Unlike innd, nnrpd supports all NNTP commands for user-oriented reading and posting. Nnrpd uses the nnrp.access(5) file to control who is authorized to access the Usenet database. It will also reject connections if the load average is greater than 10. On exit, nnrpd will report usage statistics through syslog(3). Nnrpd can accept multimedia postings that follow the MIME standard as long as such postings are also acceptible as SMTP messages. See the discussion of the MIME headers in inn.conf(5).
OPTIONS
-r If the ``-r'' flag is used, then nnrpd will reject the incoming
connection giving reason as the text. This flag is used by innd
when it is paused or throttled.
-s As each command is received, nnrpd tries to change its ``argv''
array so that ps(1) will print out the command being executed.
To get a full display, the ``-s'' flag may be used with a long
string as its argument, which will be overwritten when the
program changes its title.
-t If the ``-t'' flag is used then all client commands and initial
responses will be traced by reporting them in syslog. This flag
is set by innd under the control of the ctlinnd(8) ``trace''
command, and is toggled upon receipt of a SIGHUP; see signal(2).
-S If the ``-S'' flag is used, then all postings are forwarded to
the specified host, which should be the master NNTP server.
This flag is set by innd if it is started with the ``-S'' flag.
PROTOCOL DIFFERENCES
Nnrpd implements the NNTP commands defined in RFC 977, with the
following differences:
1. The ``ihave'' command is not implemented. Users should be using
the ``post'' command to post articles.
2 The ``slave'' command is not implemented. This command has
never been fully defined.
3 The ``list'' command may be followed by the optional word
``active.times'', ``distributions'', ``distrib.pats'',
``newsgroups'', ``subscriptions'', or ``overview.fmt'' to get a
list of when newsgroups where created, a list of valid
distributions, a file specifying default distribution patterns,
a one-per-line description of the current set of newsgroups, a
list of the automatic group subscriptions, or a listing of the
overview.fmt(5) file. The command ``list active'' is equivalent
to the ``list'' command. This is a common extension.
4. The ``xhdr'', ``authinfo user'', and ``authinfo pass'' commands
are implemented. These are based on the reference Unix
implementation; no other documentation is available.
5. A new command, ``xpat header range|MessageID pat [morepat...]'',
is provided. The first argument is the case-insensitive name of
the header to be searched. The second argument is either an
article range or a single Message-ID, as specified in RFC 977.
The third argument is a wildmat(3)-style pattern; if there are
additional arguments they are joined together separated by a
single space to form the complete pattern. This command is
similar to the ``xhdr'' command. It returns a 221 response
code, followed by the text response of all article numbers that
match the pattern.
6. The ``listgroup group'' command is provided. This is a comment
extension. It is equivalent to the ``group'' command, except
that the reply is a multi-line response containing the list of
all article numbers in the group.
7. The ``xgtitle [group]'' command is provided. This extension is
used by ANU-News. It returns a 282 reply code, followed by a
one-line description of all newsgroups that match the pattern.
The default is the current group.
8. The ``xover [range]'' command is provided. It returns a 224
reply code, followed by the overview data for the specified
range; the default is to return the data for the current
article.
9. The ``xpath MessageID'' command is provided; see innd(8).
10. The ``date'' command is provided; this is based on the draft
NNTP protocol revision. It returns a one-line response code of
111 followed by the GMT date and time on the server in the form
YYYYMMDDhhmmss.
HISTORY
Written by Rich $alz <rsalz@uunet.uu.net> for InterNetNews. Overview support added by Rob Robertston <rob@violet.berkeley.edu> and Rich in January, 1993. This is revision 1.14, dated 1996/10/29.
SEE ALSO
ctlinnd(8), innd(8), inn.conf(5), nnrp.access(5), signal(2), wildmat(3). NNRPD(8)
Opportunity
Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.
Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.
Free Software
Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.
Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.
Free Books
The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.
Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.
Education
Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.
Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.
