mkfontdir - create an index of X font files in a directory
mkfontdir [-n] [-x suffix] [-r] [-p prefix] [-e encoding-directory- name] ... [--] [directory-name ... ]
For each directory argument, mkfontdir reads all of the font files in the directory searching for properties named "FONT", or (failing that) the name of the file stripped of its suffix. These are converted to lower case and used as font names, and, along with the name of the font file, are written out to the file "fonts.dir" in the directory. The X server and font server use "fonts.dir" to find font files. The kinds of font files read by mkfontdir depend on configuration parameters, but typically include PCF (suffix ".pcf"), SNF (suffix ".snf") and BDF (suffix ".bdf"). If a font exists in multiple formats, mkfontdir will first choose PCF, then SNF and finally BDF. The first line of fonts.dir gives the number of fonts in the file. The remaining lines list the fonts themselves, one per line, in two fields. First is the name of the font file, followed by a space and the name of the font.
Because scalable font files do not usually include the X font name, the file "fonts.scale" can be used to name the scalable fonts in the directory. The fonts listed in it are copied to fonts.dir by mkfontdir. "fonts.scale" has the same format as the "fonts.dir" file, and can be created with the mkfontscale(1) program.
The file "fonts.alias", which can be put in any directory of the font- path, is used to map new names to existing fonts, and should be edited by hand. The format is two white-space separated columns, the first containing aliases and the second containing font-name patterns. Lines beginning with "!" are comment lines and are ignored. If neither the alias nor the value specifies the size fields of the font name, this is a scalable alias. A font name of any size that matches this alias will be mapped to the same size of the font that the alias resolves to. When a font alias is used, the name it references is searched for in the normal manner, looking through each font directory in turn. This means that the aliases need not mention fonts in the same directory as the alias file. To embed white space in either name, simply enclose it in double-quote marks; to embed double-quote marks (or any other character), precede them with back-slash: "magic-alias with spaces" "\"font name\" with quotes" regular-alias fixed If the string "FILE_NAMES_ALIASES" stands alone on a line, each file- name in the directory (stripped of its suffix) will be used as an alias for that font.
The option -e can be used to specify a directory with encoding files. Every such directory is scanned for encoding files, the list of which is then written to an "encodings.dir" file in every font directory. The "encodings.dir" file is used by the server to find encoding information. The "encodings.dir" file has the same format as "fonts.dir". It maps encoding names (strings of the form CHARSET_REGISTRY-CHARSET_ENCODING ) to encoding file names.
   The following options are supported:
   -e     Specify  a  directory  containing encoding files.  The -e option
          may  be  specified  multiple  times,  and  all   the   specified
          directories   will  be  read.   The  order  of  the  entries  is
          significant, as encodings found in earlier directories  override
          those  in  later  ones; encoding files in the same directory are
          discriminated by preferring compressed versions.
   -n     do not scan for fonts, do not write font directory files.   This
          option is useful when generating encoding directories only.
   -p     Specify  a  prefix  that  is prepended to the encoding file path
          names when they are written to the  "encodings.dir"  file.   The
          prefix  is  prepended  as-is.   If a `/' is required between the
          prefix and the path names, it must  be  supplied  explicitly  as
          part of the prefix.
   -r     Keep  non-absolute  encoding  directories in their relative form
          when writing  the  "encodings.dir"  file.   The  default  is  to
          convert relative encoding directories to absolute directories by
          prepending the  current  directory.   The  positioning  of  this
          options   is   significant,  as  this  option  only  applies  to
          subsequent -e options.
   -x suffix
          Ignore fonts files of type suffix.
   --     End options.
   fonts.dir      List of fonts in the directory and the  files  they  are
                  stored  in.  Created by mkfontdir.  Read by the X server
                  and font server each time the  font  path  is  set  (see
                  xset(1)).
   fonts.scale    List  of  scalable fonts in the directory.  Contents are
                  copied to fonts.dir by mkfontdir.   Can be created  with
                  mkfontscale(1).
   fonts.alias    List  of  font  name  aliases.  Read by the X server and
                  font  server  each  time  the  font  path  is  set  (see
                  xset(1)).
   encodings.dir  List  of  known  encodings and the files they are stored
                  in.  Created by mkfontdir.  Read by  the  X  server  and
                  font  server each time a font with an unknown charset is
                  opened.
X(7), Xserver(1), mkfontscale(1), xfs(1), xset(1)
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 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.
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.
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.