Free Knowledge Resources


Linux Manual Pages


Free Software * Books

Source Code

Free Media

Linux

sane-pnm(5)


NAME

   sane-pnm - SANE PNM image reader pseudo-backend

DESCRIPTION

   The  sane-pnm  library  implements  a  SANE  (Scanner  Access Now Easy)
   backend that provides access  to  PNM  (Portable  aNyMap  files,  which
   covers  PBM  bitmap  files, PGM grayscale files, and PPM pixmap files).
   The purpose of this backend is primarily to aid in  debugging  of  SANE
   frontends.  It also serves as an illustrative example of a minimal SANE
   backend.

DEVICE NAMES

   This backend provides two devices called 0 and 1.

CONFIGURATION

   No configuration required.

FILES

   /usr/lib/arch_triplet/sane/libsane-pnm.a
          The static library implementing this backend.

   /usr/lib/arch_triplet/sane/libsane-pnm.so
          The shared library implementing this backend (present on systems
          that support dynamic loading).

ENVIRONMENT

   SANE_DEBUG_PNM
          If  the  library  was  compiled with debug support enabled, this
          environment variable controls the debug level for this  backend.
          E.g.,  a  value  of 128 requests all debug output to be printed.
          Smaller levels reduce verbosity.

BUGS

   If the pnm backend is installed and saned is used  to  allow  users  on
   remote computers to scan on the local machine, pnm files can be read by
   the remote user. This is limited to the files saned can access (usually
   it's  running  as user "sane"). All pnm files can be read if saned runs
   as root which isn't recommended anyway. The pnm backend is disabled  by
   default. If you want to use it, enable it with configure (see configure
   --help for details). Be sure that only trusted users can access the pnm
   backend over saned.

AUTHOR

   Andreas Beck, Gordon Matzigkeit, and David Mosberger

SEE ALSO

   sane(7)

                              14 Jul 2008                      sane-pnm(5)



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