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       It  is  customary  to indicate the contents of a file with
       the file suffix, which consists of a period,  followed  by
       one  or  more  letters.   Many standard utilities, such as
       compilers, use this to recognize the type of file they are
       dealing  with.   The  make(1)  utility  is driven by rules
       based on file suffix.

       Following is a list of suffixes which  are  likely  to  be
       found on a Linux system.
       Suffix        | File type
        ,v           | files for RCS (Revision Control System)
        -            | backup file
        .C           | C++ source code, equivalent to .cc
        .F           | Fortran source with cpp(1) directives
                     | or file compressed using freeze
        .S           | assembler source with cpp(1) directives
        .Y           | file compressed using yabba
        .Z           | file compressed using compress(1)
        .[0-9]+gf    | TeX generic font files
        .[0-9]+pk    | TeX packed font files
        .[1-9]       | manual page for the corresponding section
        .[1-9][a-z]  | manual page for section plus subsection
        .a           | static object code library
        .ad          | X application default resource file
        .ada         | Ada source (may be body, spec, or combination)
        .adb         | Ada body source
        .ads         | Ada spec source
        .afm         | PostScript font metrics
        .al          | Perl autoload file
        .am          | automake(1) input file
        .arc         | arc(1) archive
        .arj         | arj(1) archive
        .asc         | PGP ASCII-armoured data
        .asm         | (GNU) assember source file
        .au          | Audio sound file
        .aux         | LaTeX auxiliary file
        .avi         | (msvideo) movie
        .awk         | AWK language program
        .b           | LILO boot loader image
        .bak         | backup file
        .bash        | bash(1) shell script
        .bb          | basic block list data produced by
                     | gcc -ftest-coverage
        .bbg         | basic block graph data produced by
                     | gcc -ftest-coverage
        .bbl         | BibTeX output
        .bdf         | X font file
        .bib         | TeX bibliographic database, BibTeX input
        .bm          | bitmap source
        .csh         | csh(1) shell script
        .cxx         | equivalent to .cc
        .dat         | data file
        .deb         | Debian software package
        .def         | Modula-2 source for definition modules
        .def         | other definition files
        .desc        | initial part of mail message unpacked with
                     | munpack(1)
        .diff        | file differences (diff(1) command output)
        .dir         | dbm data base directory file
        .doc         | documentation file
        .dsc         | Debian Source Control (source package)
        .dtx         | LaTeX package source file
        .dvi         | TeX's device independent output
        .el          | Emacs-Lisp source
        .elc         | compiled Emacs-Lisp source
        .eps         | encapsulated PostScript
        .exp         | Expect source code
        .f           | Fortran source
        .f77         | Fortran 77 source
        .f90         | Fortran 90 source
        .fas         | pre-compiled Common-Lisp
        .fi          | Fortran include files
        .fig         | FIG image file (used by xfig(1))
        .fmt         | TeX format file
        .gif         | Compuserve Graphics Image File format
        .gmo         | GNU format message catalog
        .gsf         | Ghostscript fonts
        .gz          | file compressed using gzip(1)
        .h           | C or C++ header files
        .help        | help file
        .hf          | equivalent to .help
        .hlp         | equivalent to .help
        .htm         | poor man's .html
        .html        | HTML document used with the World Wide Web
        .hqx         | 7-bit encoded Macintosh file
        .i           | C source after preprocessing
        .icon        | bitmap source
        .idx         | reference or datum-index file for hypertext
                     | or database system
        .image       | bitmap source
        .in          | configuration template, especially for GNU Autoconf
        .info        | files for the Emacs info browser
        .info-[0-9]+ | splitted info files
        .ins         | LaTeX package install file for docstrip
        .itcl        | itcl source code;
                     | itcl ([incr Tcl]) is an OO extension of tcl
        .java        | a Java source file
        .jpeg        | Joint Photographic Experts Group format
        .jpg         | poor man's .jpeg
        .kmap        | lyx(1) keymap
        .l           | equivalent to .lex or .lisp
        .map         | map files for various programs
        .me          | Nroff source using the me macro package
        .mf          | Metafont (font generator for TeX) source
        .mgp         | MagicPoint file
        .mm          | sources for groff(1) in mm - format
        .mo          | Message catalog binary file
        .mod         | Modula-2 source for implementation modules
        .mov         | (quicktime) movie
        .mp          | Metapost source
        .mp2         | MPEG Layer 2 (audio) file
        .mp3         | MPEG Layer 3 (audio) file
        .mpeg        | movie file
        .o           | object file
        .old         | old or backup file
        .orig        | backup (original) version of a file, from patch(1)
        .out         | output file, often executable program (a.out)
        .p           | Pascal source
        .pag         | dbm data base data file
        .patch       | file differences for patch(1)
        .pbm         | portable bitmap format
        .pcf         | X11 font files
        .pdf         | Adobe Portable Data Format
                     | (use Acrobat/acroread or xpdf)
        .perl        | Perl source (see .ph, .pl and .pm)
        .pfa         | PostScript font definition files, ASCII format
        .pfb         | PostScript font definition files, binary format
        .pgm         | portable greymap format
        .pgp         | PGP binary data
        .ph          | Perl header file
        .php         | PHP program file
        .php3        | PHP3 program file
        .pid         | File to store daemon pid (e.g. crond.pid)
        .pl          | TeX property list file or Perl library file
        .pm          | Perl module
        .png         | Portable Network Graphics file
        .po          | Message catalog source
        .pod         | perldoc(1) file
        .ppm         | portable pixmap format
        .pr          | bitmap source
        .ps          | PostScript file
        .py          | Python source
        .pyc         | compiled python
        .qt          | quicktime movie
        .r           | RATFOR source (obsolete)
        .rej         | patches that patch(1) couldn't apply
        .rpm         | RedHat software package
        .rtf         | Rich Text Format file
        .rules       | rules for something
        .s           | assembler source
        .sa          | stub libraries for a.out shared libraries
        .sc          | sc(1) spreadsheed commands
        .scm         | Scheme source code
        .taz         | tar(1) archive compressed with compress(1)
        .tcl         | tcl source code
        .tex         | TeX or LaTeX source
        .texi        | equivalent to .texinfo
        .texinfo     | Texinfo documentation source
        .text        | text file
        .tfm         | TeX font metric file
        .tgz         | tar archive compressed with gzip(1)
        .tif         | poor man's .tiff
        .tiff        | Tagged Image File Format
        .tk          | tcl/tk script
        .tmp         | temporary file
        .tmpl        | template files
        .txt         | equivalent to .text
        .uu          | equivalent to .uue
        .uue         | binary file encoded with uuencode(1)
        .vf          | TeX virtual font file
        .vpl         | TeX virtual property list file
        .w           | Silvio Levi's CWEB
        .wav         | wave sound file
        .web         | Donald Knuth's WEB
        .wml         | Source file for Web Meta Language
        .xbm         | X11 bitmap source
        .xcf         | GIMP graphic
        .xml         | eXtended Markup Language file
        .xsl         | XSL stylesheet
        .xpm         | X11 pixmap source
        .xs          | Perl xsub file produced by h2xs
        .y           | yacc(1) or bison(1) (parser generator) files
        .z           | File compressed using pack(1) (or an old gzip(1))
        .zip         | zip(1) archive
        .zoo         | zoo(1) archive
        ~            | Emacs or patch(1) backup file
        rc           | startup (`run control') file, e.g. .newsrc


       General UNIX conventions.


       This list is not exhaustive.


       file(1), make(1)

Linux                       2000-11-16                SUFFIXES(7)



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