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+/////
+vim:set ts=4 sw=4 syntax=asciidoc noet:
+/////
+pacman(8)
+=========
+
+Name
+----
+pacman - package manager utility
+
+
+Synopsis
+--------
+'pacman' <operation> [options] [packages]
+
+
+Description
+-----------
+Pacman is a package management utility that tracks installed packages on a Linux
+system. It features dependency support, package groups, install and uninstall
+hooks, and the ability to sync your local machine with a remote ftp server to
+automatically upgrade packages. Pacman packages are a zipped tar format.
+
+Since version 3.0.0, pacman has been the frontend to manlink:libalpm[3], the
+"Arch Linux Package Management" library. This library allows alternative front
+ends to be written (for instance, a GUI front end).
+
+
+Operations
+----------
+*-A, \--add* (deprecated)::
+ Add a package to the system. Either a URL or file path can be specified.
+ The package will be uncompressed into the installation root and the
+ database will be updated. The package will not be installed if another
+ version is already installed. *NOTE*: please use '\--upgrade' in place of
+ this option.
+
+*-Q, \--query*::
+ Query the package database. This operation allows you to view installed
+ packages and their files, as well as meta-information about individual
+ packages (dependencies, conflicts, install date, build date, size). This
+ can be run against the local package database or can be used on
+ individual '.tar.gz' packages. See <<QO,Query Options>> below.
+
+*-R, \--remove*::
+ Remove a package from the system. Files belonging to the specified
+ package will be deleted, and the database will be updated. Most
+ configuration files will be saved with a `.pacsave` extension unless the
+ '\--nosave' option is used. See <<RO,Remove Options>> below.
+
+*-S, \--sync*::
+ Synchronize packages. Packages are installed directly from the ftp
+ servers, including all dependencies required to run the packages. For
+ example, `pacman -S qt` will download and install qt and all the
+ packages it depends on. If a package name exists in more than one repo, the
+ repo can be explicitly specified to clarify the package to install:
+ `pacman -S testing/qt`. You can also use `pacman -Su` to upgrade all
+ packages that are out of date. See <<SO,Sync Options>> below.
+
+*-U, \--upgrade*::
+ Upgrade or add a package to the system. Either a URL or file path can be
+ specified. This is a "remove-then-add" process. See <<HCF,Handling Config
+ Files>> for an explanation on how pacman takes care of config files.
+
+*-V, \--version*::
+ Display version and exit.
+
+*-h, \--help*::
+ Display syntax for the given operation. If no operation was supplied
+ then the general syntax is shown.
+
+
+Options
+-------
+*\--asdeps*::
+ Install packages non-explicitly; in other works, fake their install reason
+ to be installed as a dependency. This is useful for makepkg and other
+ build from source tools that need to install dependencies before building
+ the package.
+
+*\--ask* <'number'>::
+ Pre-specify answers to questions. It is doubtful whether this option
+ even works, so I would not recommend using it. *TODO*: document this
+ more, as I have no idea how it works or when you would use it, or if we
+ should just dump it.
+
+*-b, \--dbpath* <'path'>::
+ Specify an alternative database location (default is ``/var/lib/pacman'').
+ This should not be used unless you know what you are doing.
+
+*-d, \--nodeps*::
+ Skips all dependency checks. Normally, pacman will always check a
+ package's dependency fields to ensure that all dependencies are
+ installed and there are no package conflicts in the system.
+
+*-f, \--force*::
+ Bypass file conflict checks and overwrite conflicting files. If the
+ package that is about to be installed contains files that are already
+ installed, this option will cause all those files to be overwritten.
+ This option should be used with care, ideally not at all.
+
+*-r, \--root* <'path'>::
+ Specify an alternative installation root (default is ``/''). This should
+ not be used as a way to install software into ``/usr/local'' instead of
+ ``/usr''. This option is used if you want to install a package on a
+ temporary mounted partition which is "owned" by another system.
+
+*-v, --verbose*::
+ Output more status messages, such as the Root, DBPath, CacheDir, etc.
+
+*\--cachedir* <'dir'>::
+ Specify an alternative package cache location (default is
+ ``/var/cache/pacman/pkg''). Multiple cache directories can be specified,
+ and they are tried in the order they are passed to pacman.
+
+*\--config* <'file'>::
+ Specify an alternate configuration file.
+
+*\--noconfirm*::
+ Bypass any and all "Are you sure?" messages. It's not a good idea to do
+ this unless you want to run pacman from a script.
+
+*\--noprogressbar*::
+ Do not show a progress bar when downloading files. This can be useful
+ for scripts that call pacman and capture the output.
+
+*\--noscriptlet*::
+ If an install scriptlet exists, do not execute it. Do not use this
+ unless you know what you are doing.
+
+
+Query Options[[QO]]
+-------------------
+*-c, \--changelog*::
+ View the ChangeLog of a package. Not every package will provide one but
+ it will be shown if available.
+
+*-d, \--deps*::
+ List all packages installed as dependencies. This option can be combined
+ with '-t' for listing real orphans- packages that were installed as
+ dependencies but are no longer required by any installed package. ('-Qdt'
+ is equivalent to the pacman 3.0.X '-Qe' option.)
+
+*-e, \--explicit*::
+ List all packages explicitly installed. This option can be combined with
+ '-t' to list top-level packages- those packages that were explicitly
+ installed but are not required by any other package. ('-Qet' is equivalent
+ to the pacman 2.9.X '-Qe' option.)
+
+*-g, \--groups*::
+ Display all packages that are members of a named group. If a name is not
+ specified, list all grouped packages.
+
+*-i, \--info*::
+ Display information on a given package. The '-p' option can be used if
+ querying a package file instead of the local database. Passing two
+ '\--info' or '-i' flags will also display the list of backup files and
+ their modification states.
+
+*-l, \--list*::
+ List all files owned by a given package. Multiple packages can be
+ specified on the command line.
+
+*-m, \--foreign*::
+ Restrict or filter output to packages that were not found in the sync
+ database(s). Typically these are packages that were downloaded manually
+ and installed with '\--upgrade'.
+
+*-o, \--owns* <'file'>::
+ Search for the package that owns file. The path can be relative or
+ absolute.
+
+*-p, \--file*::
+ Signifies that the package supplied on the command line is a file and
+ not an entry in the database. The file will be decompressed and queried.
+ This is useful in combination with '\--info' and '\--list'.
+
+*-s, \--search* <'regexp'>::
+ This will search each locally-installed package for names or
+ descriptions that match `regexp`.
+
+*-t, \--orphans*::
+ Restrict or filter output to packages not required by any currently
+ installed package.
+
+*-u, \--upgrades*::
+ Lists all packages that are out of date on the local system. This option
+ works best if the sync database is refreshed using '-Sy'.
+
+
+Remove Options[[RO]]
+--------------------
+*-c, \--cascade*::
+ Remove all target packages, as well as all packages that depend on one
+ or more target packages. This operation is recursive.
+
+*-k, \--keep*::
+ Removes the database entry only. Leaves all files in place.
+
+*-n, \--nosave*::
+ Instructs pacman to ignore file backup designations. Normally, when a
+ file is removed from the system the database is checked to see if the
+ file should be renamed with a ``.pacsave'' extension.
+
+*-s, \--recursive*::
+ Remove each target specified including all dependencies, provided that
+ (A) they are not required by other packages; and (B) they were not
+ explicitly installed by the user. This option is analogous to a
+ backwards '\--sync' operation.
+
+
+Sync Options[[SO]]
+------------------
+*-c, \--clean*::
+ Remove old packages from the cache to free up disk space. When pacman
+ downloads packages, it saves them in ``/var/cache/pacman/pkg''. Use one
+ '\--clean' switch to remove old packages; use two to remove all packages
+ from the cache.
+
+*-e, \--dependsonly*::
+ Install all dependencies of a package, but not the specified package
+ itself. This is pretty useless and we're not sure why it even exists.
+
+*-g, \--groups*::
+ Display all the members for each package group specified. If no group
+ names are provided, all groups will be listed; pass the flag twice to
+ view all groups and their members.
+
+*-i, \--info*::
+ Display dependency and other information for a given package. This will
+ search through all repositories for a matching package.
+
+*-l, \--list*::
+ List all packages in the specified repositories. Multiple repositories
+ can be specified on the command line.
+
+*-p, \--print-uris*::
+ Print out URIs for each package that will be installed, including any
+ dependencies yet to be installed. These can be piped to a file and
+ downloaded at a later time, using a program like wget.
+
+*-s, \--search* <'regexp'>::
+ This will search each package in the sync databases for names or
+ descriptions that match `regexp`.
+
+*-u, \--sysupgrade*::
+ Upgrades all packages that are out of date. Each currently-installed
+ package will be examined and upgraded if a newer package exists. A
+ report of all packages to upgrade will be presented and the operation
+ will not proceed without user confirmation. Dependencies are
+ automatically resolved at this level and will be installed/upgraded if
+ necessary.
+
+*-w, \--downloadonly*::
+ Retrieve all packages from the server, but do not install/upgrade
+ anything.
+
+*-y, \--refresh*::
+ Download a fresh copy of the master package list from the server(s)
+ defined in pacman.conf. This should typically be used each time you use
+ '\--sysupgrade' or '-u'. Passing two '\--refresh' or '-y' flags will force
+ a refresh of all package lists even if they are thought to be up to date.
+
+*\--needed*::
+ Only install the targets that are not already installed and up-to-date.
+
+*\--ignore* <'package'>::
+ Directs pacman to ignore upgrades of package even if there is one
+ available. Multiple packages can be specified by separating them
+ with a comma.
+
+*\--ignoregroup* <'group'>::
+ Directs pacman to ignore upgrades of all packages in 'group' even if
+ there is one available. Multiple groups can be specified by
+ separating them with a comma.
+
+
+Handling Config Files[[HCF]]
+----------------------------
+Pacman uses the same logic as rpm to determine action against files that are
+designated to be backed up. During an upgrade, 3 md5 hashes are used for each
+backup file to determine the required action: one for the original file
+installed, one for the new file that's about to be installed, and one for the
+actual file existing on the filesystem. After comparing these 3 hashes, the
+follow scenarios can result:
+
+original=X, current=X, new=X::
+ All three files are the same, so overwrites are not an issue Install the
+ new file.
+
+original=X, current=X, new=Y::
+ The current file is the same as the original but the new one differs.
+ Since the user did not ever modify the file, and the new one may contain
+ improvements or bugfixes, install the new file.
+
+original=X, current=Y, new=X::
+ Both package versions contain the exact same file, but the one on the
+ filesystem has been modified. Leave the current file in place.
+
+original=X, current=Y, new=Y::
+ The new file is identical to the current file. Install the new file.
+
+original=X, current=Y, new=Z::
+ All three files are different, so install the new file with a '.pacnew'
+ extension and warn the user. The user must then manually merge any
+ necessary changes into the original file.
+
+
+Configuration
+-------------
+See manlink:pacman.conf[5] for more details on configuring pacman using the
+'pacman.conf' file.
+
+
+See Also
+--------
+manlink:pacman.conf[5], manlink:makepkg[8], manlink:libalpm[3]
+
+include::footer.txt[]