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deb(5)                                        Debian                                       deb(5)



NAME
       deb - Debian binary package format

SYNOPSIS
       filename.deb

DESCRIPTION
       The .deb format is the Debian binary package file format. It is understood by dpkg 0.93.76
       and later, and is generated by default by  all  versions  of  dpkg  since  1.2.0  and  all
       i386/ELF versions since 1.1.1elf.

       The  format  described  here  is  used  since  Debian  0.93; details of the old format are
       described in deb-old(5).

FORMAT
       The file is an ar archive with a magic number of !<arch>.

       The first member is named debian-binary and contains a series of lines, separated by  new-
       lines. 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.gz.  It is a gzipped tar archive  contain-
       ing the package control information, as a series of plain files, of which the file control
       is mandatory and contains the core control information. The control tarball may optionally
       contain an entry for `.', the current directory.

       The  third, last required member is named data.tar.gz.  It contains the filesystem archive
       as a gzipped tar archive.

       These members must occur in this exact order. Current implementations  should  ignore  any
       additional  members  after data.tar.gz.  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  before  data.tar.gz  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.gz  with  names  starting  with  something  other than underscores, or will (more
       likely) cause the major version number to be increased.

SEE ALSO
       deb-old(5), dpkg-deb(1), deb-control(5).



Debian Project                              2006-02-28                                     deb(5)

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