dpkg-query
Section: dpkg suite (1)
Updated: 2011-08-14
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NAME
dpkg-query - a tool to query the dpkg database
SYNOPSIS
dpkg-query
[
option...]
command
DESCRIPTION
dpkg-query is a tool to show information about packages listed in
the
dpkg database.
COMMANDS
- -l, --list [package-name-pattern...]
-
List packages matching given pattern. If no package-name-pattern
is given, list all packages in /var/lib/dpkg/status, excluding
the ones marked as not-installed (i.e. those which have been previously
purged). Normal shell wildchars are allowed
in package-name-pattern. Please note you will probably have to
quote package-name-pattern to prevent the shell from performing
filename expansion. For example this will list all package names starting
with ``libc6'':
dpkg-query -l 'libc6*'
The first three columns of the output show the desired action, the package
status, and errors, in that order.
Desired action:
u = Unknown
i = Install
h = Hold
r = Remove
p = Purge
Package status:
n = Not-installed
c = Config-files
H = Half-installed
U = Unpacked
F = Half-configured
W = Triggers-awaiting
t = Triggers-pending
i = Installed
Error flags:
<empty> = (none)
R = Reinst-required
An uppercase status or error letter indicates the package is likely to
cause severe problems. Please refer to dpkg(1) for information
about the above states and flags.
The output format of this option is not configurable, but varies
automatically to fit the terminal width. It is intended for human
readers, and is not easily machine-readable. See -W (--show)
and --showformat for a way to configure the output format.
- -W, --show [package-name-pattern...]
-
Just like the --list option this will list all packages matching
the given pattern. However the output can be customized using the
--showformat option.
The default output format gives one line per matching package, each line
having the name (extended with the architecture qualifier for
foreign architecture packages) and installed version of the package,
separated by a tab.
- -s, --status package-name...
-
Report status of specified package. This just displays the entry in
the installed package status database. When multiple package-name
are listed, the requested status entries are separated by an empty line.
- -L, --listfiles package-name...
-
List files installed to your system from package-name. When multiple
package-name are listed, the requested lists of files are separated
by an empty line. However, note that files created by package-specific
installation-scripts are not listed.
- -c, --control-path package-name [control-file]
-
List paths for control files installed to your system from package-name.
If control-file is specified then only list the path for that control
file if it is present. Warning: this command is semi-public, it should
be used only as a last resort solution, and if no other interface is
available. It might get deprecated later on if better interfaces or the
current architectural deficiencies have been solved.
- -S, --search filename-search-pattern...
-
Search for packages that own files corresponding to the given pattern.
Standard shell wildchars can be used in the pattern.
This command will not list extra files created by maintainer scripts,
nor will it list alternatives.
- -p, --print-avail package-name...
-
Display details about package-name, as found in
/var/lib/dpkg/available. When multiple package-name are
listed, the requested available entries are separated by an empty
line.
Users of APT-based frontends
should use apt-cache show package-name instead
as the available file is only kept up-to-date when
using dselect.
- -h, --help
-
Show the usage message and exit.
- --version
-
Show the version and exit.
OPTIONS
- --admindir=dir
-
Change the location of the dpkg database. The default location is
/var/lib/dpkg.
- -f, --showformat=format
-
This option is used to specify the format of the output --show
will produce. The format is a string that will be output for each package
listed.
In the format string, "\" introduces escapes:
\n newline
\r carriage return
\t tab
"\" before any other character suppresses any special
meaning of the following character, which is useful for "\"
and "$".
Package information can be included by inserting
variable references to package fields using the syntax
"${field[;width]}". Fields are
printed right-aligned unless the width is negative in which case left
alignment will be used. The following fields are recognised but
they are not necessarily available in the status file (only internal
fields or fields stored in the binary package end up in it):
Architecture
Bugs
Conffiles (internal)
Config-Version (internal)
Conflicts
Breaks
Depends
Description
Enhances
Essential
Filename (internal, front-end related)
Homepage
Installed-Size
MD5sum (internal, front-end related)
MSDOS-Filename (internal, front-end related)
Maintainer
Origin
Package
PackageSpec (virtual field)
Pre-Depends
Priority
Provides
Recommends
Replaces
Revision (obsolete)
Section
Size (internal, front-end related)
Source
Status (internal)
Suggests
Tag (usually not in the .deb but in the repository Packages files)
Triggers-Awaited (internal)
Triggers-Pending (internal)
Version
The default format string is "${PackageSpec}\t${Version}\n".
Actually, all other fields found in the status file (i.e. user defined
fields) can be requested, too. They will be printed as-is, though, no
conversion nor error checking is done on them. PackageSpec is a
special field that will print the package name with an architecture
qualifier (like "libc6:amd64") if the package is of a foreign architecture
(an architecture that doesn't match dpkg's architecture).
To get the name of the dpkg maintainer and the installed version, you could
run:
dpkg-query -W -f='${PackageSpec} ${Version}\t${Maintainer}\n' dpkg
EXIT STATUS
- 0
-
The requested query was successfully performed.
- 1
-
Problems were encountered while parsing the command line or performing the
query, including no file or package being found (except for --control-path).
ENVIRONMENT
- DPKG_ADMINDIR
-
If set and the --admindir option has not been specified, it will
be used as the dpkg data directory.
- COLUMNS
-
This setting influences the output of the --list option by changing
the width of its output.
AUTHOR
Copyright © 2001 Wichert Akkerman
This is free software; see the GNU General Public Licence version 2 or
later for copying conditions. There is NO WARRANTY.
SEE ALSO
dpkg(1).
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- COMMANDS
-
- OPTIONS
-
- EXIT STATUS
-
- ENVIRONMENT
-
- AUTHOR
-
- SEE ALSO
-
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