Section: Debian (5)
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deb-control - Debian packages' master control file format
Each Debian package contains the master `control' file, which contains
a number of fields, or comments when the line starts with '#'
field begins with a tag, such as
(case insensitive), followed by a colon, and the body of the field.
Fields are delimited only by field tags. In other words, field text
may be multiple lines in length, but the installation tools will
generally join lines when processing the body of the field (except
in the case of the
field, see below).
- Package: package-name
The value of this field determines the package name, and is used to
generate file names by most installation tools.
- Version: version-string
Typically, this is the original package's version number in whatever form
the program's author uses. It may also include a Debian revision number
(for non-native packages). The exact format and sorting algorithm
are described in
- Maintainer: fullname-email
Should be in the format `Joe Bloggs <firstname.lastname@example.org>', and is typically
the person who created the package, as opposed to the author of the
software that was packaged.
- Description: short-description
The format for the package description is a short brief summary on the
first line (after the "Description" field). The following lines should be
used as a longer, more detailed description. Each line of the long description
must be preceded by a space, and blank lines in the long description must
contain a single '.' following the preceding space.
- Section: section
This is a general field that gives the package a category based on the
software that it installs. Some common sections are `utils', `net',
`mail', `text', `x11' etc.
- Priority: priority
Sets the importance of this package in relation to the system as a whole.
Common priorities are `required', `standard', `optional', `extra' etc.
In Debian, the
fields have a defined set of accepted values based on the Policy Manual.
A list of these values can be obtained from the latest version of the
- Essential: yes|no
This field is usually only needed when the answer is yes. It denotes
a package that is required for proper operation of the system. Dpkg
or any other installation tool will not allow an
package to be removed (at least not without using one of the force options).
- Architecture: arch|all
The architecture specifies which type of hardware this package was compiled
for. Common architectures are `i386', `m68k', `sparc', `alpha', `powerpc'
etc. Note that the
option is meant for packages that are architecture independent. Some examples
of this are shell and Perl scripts, and documentation.
- Origin: name
The name of the distribution this package is originating from.
- Bugs: url
The url of the bug tracking system for this package. The current
used format is bts-type://bts-address, like
- Homepage: url
The upstream project home page url.
- Tag: tag-list
List of tags describing the qualities of the package. The description and
list of supported tags can be found in the debtags package.
- Multi-Arch: same|foreign|allowed|no
This field is used to indicate how this package should behave on a multi-arch
installations. The value same means that the package is co-installable
with itself, but it must not be used to satisfy the dependency of any package
of a different architecture from itself. The value foreign means that
the package is not co-installable with itself, but should be allowed to
satisfy the dependency of a package of a different arch from itself. The
value allowed allows reverse-dependencies to indicate in their
Depends field that they accept a package from a foreign architecture, but
has no effect otherwise.
The value no is the default when the field is omitted, in which case
adding the field with an explicit no value is generally not needed.
- Source: source-name
The name of the source package that this binary package came from, if
different than the name of the package itself.
- Subarchitecture: value
These fields are used by the debian-installer and are usually not needed.
See /usr/share/doc/debian-installer/devel/modules.txt from the
package for more details about them.
- Depends: package-list
List of packages that are required for this package to provide a
non-trivial amount of functionality. The package maintenance software
will not allow a package to be installed if the packages listed in its
field aren't installed (at least not without using the force options).
In an installation, the postinst scripts of packages listed in Depends:
fields are run before those of the packages which depend on them. On the
opposite, in a removal, the prerm script of a package is run before
those of the packages listed in its Depends: field.
- Pre-Depends: package-list
List of packages that must be installed
configured before this one can be installed. This is usually used in the
case where this package requires another package for running its preinst
- Recommends: package-list
Lists packages that would be found together with this one in all but
unusual installations. The package maintenance software will warn the
user if they install a package without those listed in its
- Suggests: package-list
Lists packages that are related to this one and can perhaps enhance
its usefulness, but without which installing this package is perfectly
The syntax of
fields is a list of groups of alternative packages. Each group is a list
of packages separated by vertical bar (or `pipe') symbols, `|'. The
groups are separated by commas. Commas are to be read as `AND', and pipes
as `OR', with pipes binding more tightly. Each package name is
optionally followed by a version number specification in parentheses.
A version number may start with a `>>', in which case any later version
will match, and may specify or omit the Debian packaging revision (separated
by a hyphen). Accepted version relationships are ">>" for greater than,
"<<" for less than, ">=" for greater than or equal to, "<=" for less than
or equal to, and "=" for equal to.
- Breaks: package-list
Lists packages that this one breaks, for example by exposing bugs
when the named packages rely on this one. The package maintenance
software will not allow broken packages to be configured; generally
the resolution is to upgrade the packages named in a
- Conflicts: package-list
Lists packages that conflict with this one, for example by containing
files with the same names. The package maintenance software will not
allow conflicting packages to be installed at the same time. Two
conflicting packages should each include a
line mentioning the other.
- Replaces: package-list
List of packages files from which this one replaces. This is used for
allowing this package to overwrite the files of another package and
is usually used with the
field to force removal of the other package, if this one also has the
same files as the conflicted package.
- Provides: package-list
This is a list of virtual packages that this one provides. Usually this is
used in the case of several packages all providing the same service.
For example, sendmail and exim can serve as a mail server, so they
provide a common package (`mail-transport-agent') on which other packages
can depend. This will allow sendmail or exim to serve as a valid option
to satisfy the dependency. This prevents the packages that depend on a mail
server from having to know the package names for all of them, and using
`|' to separate the list.
The syntax of
is a list of package names, separated by commas (and optional whitespace).
fields, the comma should be read as `OR'. An optional version can also be
given with the same syntax as above for the
- Built-Using: package-list
This field lists extra source packages that were used during the build of this
binary package. This is an indication to the archive maintenance software that
these extra source packages must be kept whilst this binary package is
maintained. This field must be a list of source package names with strict (=)
version relationships. Note that the archive maintenance software is likely to
refuse to accept an upload which declares a
relationship which cannot be satisfied within the archive.
Maintainer: Wichert Akkerman <email@example.com>
Pre-Depends: libc6 (>= 2.0.105)
Description: GNU grep, egrep and fgrep.
The GNU family of grep utilities may be the "fastest grep in the west".
GNU grep is based on a fast lazy-state deterministic matcher (about
twice as fast as stock Unix egrep) hybridized with a Boyer-Moore-Gosper
search for a fixed string that eliminates impossible text from being
considered by the full regexp matcher without necessarily having to
look at every character. The result is typically many times faster
than Unix grep or egrep. (Regular expressions containing backreferencing
will run more slowly, however).
- REQUIRED FIELDS
- OPTIONAL FIELDS
- SEE ALSO