deb-split - Debian multi-part binary package format
The multi-part .deb
format is used to split big packages into smaller
pieces to ease transport in small media.
The file is an ar
archive with a magic value of !<arch>
file names might contain a trailing slash (since dpkg 1.15.6).
The first member is named debian-split
and contains a series of lines,
separated by newlines. Currently eight lines are present:
- The format version number, 2.1 at the time this
manual page was written.
- The package name.
- The package version.
- The md5sum of the package.
- The total size of the package.
- The maximum part size.
- The current part number, followed by a slash and the total
amount of parts (as in ‘1/10’).
- The package architecture (since dpkg 1.16.1).
Programs which read multi-part archives should be prepared for the minor format
version number to be increased and additional lines to be present, and should
ignore these if this is the case.
If the major format version 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, last required member is named data.N
, where N
denotes the part number. It contains the raw part data.
These members must occur in this exact order. Current implementations should
ignore any additional members after data.N
. Further members may
be defined in the future, and (if possible) will be placed after these two.