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deb(5)                            dpkg suitedeb(5)NAME       deb - Debian binary package formatSYNOPSIS       filename.debDESCRIPTION       The  .deb  format  is  the  Debian  binary  package  file format. It is       understood since dpkg 0.93.76, and is generated by default  since  dpkg       1.2.0 and 1.1.1elf (i386/ELF builds).       The format described here is used since Debian 0.93; details of the old       format are described indeb-old(5).FORMAT       The file is an ar archive with a magic  value  of  !<arch>.   Only  the       common  ar  archive  format  is  supported,  with  no  long  file  name       extensions, but with file names containing an optional trailing  slash,       which limits their length to 15 characters (from the 16 allowed).  File       sizes are limited to 10  ASCII  decimal  digits,  allowing  for  up  to       approximately 9536.74 MiB member files.       The  tar archives currently allowed are, the old-style (v7) format, the       pre-POSIX ustar format, a subset of the  GNU  format  (new  style  long       pathnames and long linknames, supported since dpkg 1.4.1.17; large file       metadata since dpkg 1.18.24), and the POSIX ustar  format  (long  names       supported   since   dpkg   1.15.0).   Unrecognized  tar  typeflags  are       considered an error.  Each tar entry  size  inside  a  tar  archive  is       limited to 11 ASCII octal digits, allowing for up to 8 GiB tar entries.       The GNU large file metadata support permits 95-bit tar entry sizes  and       negative timestamps, and 63-bit UID, GID and device numbers.       The first member is named debian-binary and contains a series of lines,       separated by newlines. Currently only one line is present,  the  format       version number, 2.0 at the time this manual page was written.  Programs       which read new-format archives should be prepared for the minor  number       to be increased and new lines to be present, and should ignore these if       this is the case.       If the major number has changed, an incompatible change has  been  made       and  the program should stop. If it has not, then the program should be       able to safely continue, unless it encounters an unexpected  member  in       the archive (except at the end), as described below.       The  second  required member is named control.tar.  It is a tar archive       containing the  package  control  information,  either  not  compressed       (supported  since  dpkg  1.17.6),  or  compressed  with  gzip (with .gz       extension), xz (with .xz extension, supported  since  1.17.6)  or  zstd       (with  .zst extension, supported since 1.19.0.5ubuntu2), as a series of       plain files, of which the file control is mandatory  and  contains  the       core  control  information, the conffiles, triggers, shlibs and symbols       files contain optional control information, and the preinst,  postinst,       prerm  and  postrm  files are optional maintainer scripts.  The control       tarball may optionally contain an entry for '.', the current directory.       The third, last required member is named  data.tar.   It  contains  the       filesystem  as  a  tar  archive, either not compressed (supported since       dpkg 1.10.24), or compressed with gzip (with .gz extension),  xz  (with       .xz extension, supported since dpkg 1.15.6), zstd (with .zst extension,       supported since 1.19.0.5ubuntu2), bzip2 (with .bz2 extension, supported       since dpkg 1.10.24) or lzma (with .lzma extension, supported since dpkg       1.13.25).       These members must occur in this exact order.  Current  implementations       should  ignore  any additional members after data.tar.  Further members       may be defined in the future, and (if possible) will  be  placed  after       these  three. Any additional members that may need to be inserted after       debian-binary and before control.tar or data.tar and  which  should  be       safely  ignored  by  older  programs,  will have names starting with an       underscore, '_'.       Those new members which won't be able to  be  safely  ignored  will  be       inserted  before data.tar with names starting with something other than       underscores, or will (more likely) cause the major version number to be       increased.MEDIA TYPE   Current       application/vnd.debian.binary-package   Deprecated       application/x-debian-package       application/x-debSEE ALSOdeb-old(5),dpkg-deb(1),deb-control(5),deb-conffiles(5)deb-triggers(5),deb-shlibs(5),deb-symbols(5),deb-preinst(5),deb-postinst(5),deb-prerm(5),deb-postrm(5).1.19.7                            2022-05-25deb(5)