SUFFIXES Section: Linux Programmer's Manual (7) Updated: April 4, 2025 Index   NAME suffixes - list of file suffixes   DESCRIPTION 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 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  - backup file  .C C++ source code or file compressed using freeze  .Y file compressed using yabba  .[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  .afm PostScript font metrics  .al Perl autoload file  .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  .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  .bmp bitmap  .c C source  .cat message catalog files  .cc C++ source  .cf configuration file  .cfg configuration file  .cgi WWW content generating script or program  .class Java compiled byte-code  .conf configuration file  .config configuration file  .cpp equivalent to .cc  .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  .dir dbm data base directory file  .doc documentation file  .dtx LaTeX package source file  .dvi TeX's device independent output  .el Emacs-Lisp source  .elc compiled Emacs-Lisp source  .eps encapsulated PostScript  .f Fortran source  .fas pre-compiled Common-Lisp  .fi Fortran include files  .fmt TeX format file  .gif Compuserve Graphics Image File format  .gmo GNU format message catalog  .gsf Ghostscript fonts  .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  .java a Java source file  .jpeg Joint Photographic Experts Group format  .jpg poor man's .jpeg  .l equivalent to .lex or .lisp  .lha lharc archive  .lib Common-Lisp library  .lisp Lisp source  .log log file, in particular produced by TeX  .lsm Linux Software Map entry  .lsp Common-Lisp source  .lzh lharc archive  .mac macro files for various programs  .man manual page (usually source rather than formatted)  .map map files for various programs  .me Nroff source using the me macro package  .mf Metafont (font generator for TeX) source  .mo Message catalog binary file  .mod Modula-2 source for implementation modules  .mov (quicktime) movie  .mp Metapost source  .mpeg movie file  .o object file  .old old or backup file  .out output file, often executable program (a.out)  .p Pascal source  .pag dbm data base data file  .pbm portable bitmap format  .pcf X11 font files  .pdf Adobe Portable Data Format (use Acrobat/acroread or xpdf)  .perl Perl source  .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  .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  .ppm portable pixmap format  .pr bitmap source  .ps PostScript file  .py Python source  .pyc compiled python  .qt quicktime movie  .r RATFOR source (obsolete)  .rpm RedHat software package  .rtf Rich Text Format file  .rules rules for something  .s assembler source  .sa stub libraries for a.out shared libraries  .sgml SGML source file  .so Shared library or dynamically loadable object  .sql SQL source  .sqml SQML schema or query program  .sty LaTeX style files  .sym Modula-2 compiled definition modules  .tex TeX or LaTeX source  .texi equivalent to .texinfo  .texinfo Texinfo documentation source  .text text file  .tfm TeX font metric file  .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  .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  .xbm X11 bitmap source  .xpm X11 pixmap source  .xs Perl xsub file produced by h2xs  rc startup (`run control') file, e.g. .newsrc   CONFORMS TO General UNIX conventions.   BUGS This list is not exhaustive.   SEE ALSO   Index NAME DESCRIPTION CONFORMS TO BUGS SEE ALSO This document was created by using the manual pages. Time: 12:14:04 GMT, March 24, 2025