Free Knowledge Resources


Linux Manual Pages


Free Software * Books

Source Code

Free Media

Linux

popauth(1)


NAME

   popauth - manage pop3 authentication database

SYNOPSIS

   popauth [OPTION...]

DESCRIPTION

   GNU popauth -- manage pop3 authentication database

          Actions are:

   -a, --add
          add user

   -c, --create
          create the DBM from a plaintext file

   -d, --delete
          delete user's record

   -l, --list
          list the contents of DBM file

   -m, --modify
          modify user's record (change password)

          Options are:

   --compatibility
          compatibility mode

   -f, --file=FILE
          read input from FILE (default stdin)

   -o, --output=FILE
          direct output to file

   -P, --permissions=PERM
          force given permissions on the database

   -p, --password=STRING
          specify user's password

   -u, --user=USERNAME
          specify user name

   -?, --help
          give this help list

   --usage
          give a short usage message

   -V, --version
          print program version

   Mandatory  or  optional arguments to long options are also mandatory or
   optional for any corresponding short options.

   Default action is:
          For root: --list For a user: --modify --user <username>

REPORTING BUGS

   Report bugs to <bug-mailutils@gnu.org>.
   GNU Mailutils home page: <http://mailutils.org>
   General help using GNU software: <http://www.gnu.org/gethelp/>

COPYRIGHT

   Copyright  2007-2016 Free Software Foundation, inc.   License  GPLv3+:
   GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
   This  is  free  software:  you  are free to change and redistribute it.
   There is NO WARRANTY, to the extent permitted by law.

   Database formats: kc

SEE ALSO

   The complete GNU mailutils documentation is  maintained  as  a  Texinfo
   manual. If the mailutils-doc package is installed, the command

          info mailutils

   should give you access to the complete manual.
   You can also find this manual online in the GNU mailutils webpage:
   http://www.gnu.org/software/mailutils/manual/index.html.
   Please  note  this  manpage  was  automatically generated by the Debian
   mailutils packagers. Do not file  bugs  for  its  content  to  the  GNU
   Mailutils upstream authors.



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.


birds banner