yum(8)																	    yum(8)

NAME

       yum - Yellowdog Updater Modified

SYNOPSIS

       yum [options] [command] [package ...]

DESCRIPTION

       yum  is an interactive, rpm based, package manager. It can automatically perform system updates, including dependency analysis and obsolete
       processing based on "repository" metadata. It can also perform installation of new packages, removal of old packages and perform queries on
       the installed and/or available packages among many other commands/services (see below). yum is similar to other high level package managers
       like apt-get and smart.

       While there are some graphical interfaces directly to the yum code, more recent graphical interface development	is  happening  with  Pack-
       ageKit and the gnome-packagekit application.

       command is one of:
	* install package1 [package2] [...]
	* update [package1] [package2] [...]
	* check-update
	* upgrade [package1] [package2] [...]
	* remove | erase package1 [package2] [...]
	* list [...]
	* info [...]
	* provides | whatprovides feature1 [feature2] [...]
	* clean [ packages | headers | metadata | dbcache | all ]
	* makecache
	* groupinstall group1 [group2] [...]
	* groupupdate group1 [group2] [...]
	* grouplist [hidden] [groupwildcard] [...]
	* groupremove group1 [group2] [...]
	* groupinfo group1 [...]
	* search string1 [string2] [...]
	* shell [filename]
	* resolvedep dep1 [dep2] [...]
	* localinstall rpmfile1 [rpmfile2] [...]
	* localupdate rpmfile1 [rpmfile2] [...]
	* reinstall package1 [package2] [...]
	* downgrade package1 [package2] [...]
	* deplist package1 [package2] [...]
	* repolist [all|enabled|disabled]
	* version [all|installed|available|group-*|grouplist|groupinfo]
	* history [info|list|summary|redo|undo|new]
	* help [command]

       Unless the --help or -h option is given, one of the above commands must be present.

       Repository configuration is honored in all operations.

       install
	      Is  used	to install the latest version of a package or group of packages while ensuring that all dependencies are satisfied.  If no
	      package matches the given package name(s), they are assumed to be a shell glob and any matches  are  then  installed.  If  the  name
	      starts  with  an	@ character the rest of the name is used as though passed to the groupinstall command. If the name is a file, then
	      install works like localinstall. If the name  doesn't  match  a  package,  then  package	"provides"  are  searched  (Eg.  "_sqlite-
	      cache.so()(64bit)") as are filelists (Eg. "/usr/bin/yum"). Also note that for filelists, wildcards will match multiple packages.

       update If  run  without	any  packages, update will update every currently installed package.  If one or more packages or package globs are
	      specified, Yum will only update the listed packages.  While updating packages, yum will ensure that all dependencies are	satisfied.
	      If  the  packages  or  globs specified match to packages which are not currently installed then update will not install them. update
	      operates on groups, files, provides and filelists just like the "install" command.

	      If the main obsoletes configure option is true (default) or the --obsoletes flag is present yum will include  package  obsoletes	in
	      its calculations - this makes it better for distro-version changes, for example: upgrading from somelinux 8.0 to somelinux 9.

       check-update
	      Implemented  so  you  could know if your machine had any updates that needed to be applied without running it interactively. Returns
	      exit value of 100 if there are packages available for an update. Also returns a list of the packages to be updated in  list  format.
	      Returns 0 if no packages are available for update. Returns 1 if an error occurred.  Running in verbose mode also shows obsoletes.

       upgrade
	      Is the same as the update command with the --obsoletes flag set. See update for more details.

       remove or erase
	      Are  used  to  remove  the  specified  packages  from  the system as well as removing any packages which depend on the package being
	      removed. remove operates on groups, files, provides and filelists just like the "install" command.

       list   Is used to list various information about available packages; more complete details are available in the List Options section below.

       provides or whatprovides
	      Is used to find out which package provides some feature or file. Just use a specific name or a file-glob-syntax  wildcards  to  list
	      the packages available or installed that provide that feature or file.

       search Is  used	to find any packages matching a string in the description, summary and package name fields of an rpm. Useful for finding a
	      package you do not know by name but know by some word related to it.

       info   Is used to list a description and summary information about available packages; takes the same arguments as in the List Options sec-
	      tion below.

       clean  Is used to clean up various things which accumulate in the yum cache directory over time.  More complete details can be found in the
	      Clean Options section below.

       makecache
	      Is used to download and make usable all the metadata for the currently enabled yum repos.

       groupinstall
	      Is used to install all of the individual packages in a group, of the specified types (this works as if you'd  taken  each  of  those
	      package names and put them on the command line for a "yum install" command).
	       The group_package_types configuration option specifies which types will be installed.

       groupupdate
	      Is  just an alias for groupinstall, which will do the right thing because "yum install X" and "yum update X" do the same thing, when
	      X is already installed.

       grouplist
	      Is used to list the available groups from all yum repos. Groups are marked as "installed" if all mandatory packages  are	installed,
	      or if a group doesn't have any mandatory packages then it is installed if any of the optional or default package are installed.  The
	      optional "hidden" argument will also list groups marked as not being "user visible". If you pass the -v option,  to  enable  verbose
	      mode, then the groupids are displayed.

       groupremove
	      Is  used	to  remove  all  of  the  packages in a group, unlike "groupinstall" this will remove everything regardless of group_pack-
	      age_types. It is worth pointing out that packages can be in more than one group, so "groupinstall X Y" followed by  "groupremove	Y"
	      does not do give you the same result as "groupinstall X".

       groupinfo
	      Is used to give the description and package list of a group (and which type those packages are marked as). Note that you can use the
	      yum-filter-data and yum-list-data plugins to get/use the data the other way around (Ie. what groups own packages need updating).	If
	      you  pass  the -v option, to enable verbose mode, then the package names are matched against installed/available packages similar to
	      the list command.

       shell  Is used to enter the 'yum shell', when a filename is specified the contents of that file is executed in yum  shell  mode.  See  yum-
	      shell(8) for more info

       resolvedep
	      Is used to list packages providing the specified dependencies, at most one package is listed per dependency.

       localinstall
	      Is  used	to  install a set of local rpm files. If required the enabled repositories will be used to resolve dependencies. Note that
	      the install command will do a local install, if given a filename.

       localupdate
	      Is used to update the system by specifying local rpm files. Only the specified rpm files	of  which  an  older  version  is  already
	      installed will be installed, the remaining specified packages will be ignored.  If required the enabled repositories will be used to
	      resolve dependencies. Note that the update command will do a local install, if given a filename.

       reinstall
	      Will reinstall the identically versioned package as is currently installed.  This does not work  for  "installonly"  packages,  like
	      Kernels. reinstall operates on groups, files, provides and filelists just like the "install" command.

       downgrade
	      Will  try and downgrade a package from the version currently installed to the previously highest version (or the specified version).
	      The depsolver will not necessarily work, but if you specify all the packages it should work (and thus. all  the  simple  cases  will
	      work). Also this does not work for "installonly" packages, like Kernels. downgrade operates on groups, files, provides and filelists
	      just like the "install" command.

       deplist
	      Produces a list of all dependencies and what packages provide those dependencies for the given packages.

       repolist
	      Produces a list of configured repositories. The default is to list all enabled repositories. If you pass -v, for verbose mode,  more
	      information is listed.

       version
	      Produces	a  "version"  of  the rpmdb, and of the enabled repositories if "all" is given as the first argument. You can also specify
	      version groups in the version-groups config. file. If you pass -v, for verbose mode, more information is listed. The version is cal-
	      culated  by  taking  a sha1 hash of the packages (in sorted order), and the checksum_type/checksum_data entries from the yumdb. Note
	      that this rpmdb version is now also used significantly within yum (esp. in yum history).

       history
	      The history command allows the user to view what has happened in past transactions (assuming the history_record  config.	option	is
	      set). You can use info/list/summary to view what happened, undo/redo to act on that information and new to start a new history file.

	      The  info/list/summary  commands	take  either  a transactions id or a package (with wildcards, as in Specifying package names), all
	      three can also be passed no arguments. list can be passed the keyword "all" to list all the transactions.   undo/redo  just  take  a
	      transaction id.

       help   Produces help, either for all commands or if given a command name then the help for that particular command.

GENERAL OPTIONS

       Most  command line options can be set using the configuration file as well and the descriptions indicate the necessary configuration option
       to set.

       -h, --help
	      Help; display a help message and then quit.

       -y     Assume yes; assume that the answer to any question which would be asked is yes.
	      Configuration Option: assumeyes

       -c [config file]
	      Specifies the config file location - can take HTTP and FTP URLs and local file paths.

       -q, --quiet
	      Run without output.  Note that you likely also want to use -y.

       -v, --verbose
	      Run with a lot of debugging output.

       -d [number]
	      Sets the debugging level to [number] - turns up or down the amount of things that are printed. Practical range: 0 - 10
	      Configuration Option: debuglevel

       -e [number]
	      Sets the error level to [number] Practical range 0 - 10. 0 means print only critical errors about which you must be  told.  1  means
	      print all errors, even ones that are not overly important. 1+ means print more errors (if any) -e 0 is good for cron jobs.
	      Configuration Option: errorlevel

       -R [time in minutes]
	      Sets the maximum amount of time yum will wait before performing a command - it randomizes over the time.

       -C     Tells yum to run entirely from cache - does not download or update any headers unless it has to to perform the requested action.

       --version
	      Reports  the  yum  version number and installed package versions for everything in history_record_packages (can be added to by plug-
	      ins).

       --showduplicates
	      Doesn't limit packages to their latest versions in the info, list and search commands  (will  also  affect  plugins  which  use  the
	      doPackageLists() API).

       --installroot=root
	      Specifies an alternative installroot, relative to which all packages will be installed.
	      Configuration Option: installroot

       --enablerepo=repoidglob
	      Enables specific repositories by id or glob that have been disabled in the configuration file using the enabled=0 option.
	      Configuration Option: enabled

       --disablerepo=repoidglob
	      Disables specific repositories by id or glob.
	      Configuration Option: enabled

       --obsoletes
	      This  option only has affect for an update, it enables yum's obsoletes processing logic. For more information see the update command
	      above.
	      Configuration Option: obsoletes

       -x, --exclude=package
	      Exclude a specific package by name or glob from updates on all repositories.  Configuration Option: exclude

       --color=[always|auto|never]
	      Display colorized output automatically, depending on the output terminal, always (using ANSI codes) or never. Note  that	some  com-
	      mands (Eg. list and info) will do a little extra work when color is enabled.  Configuration Option: color

       --disableexcludes=[all|main|repoid]
	      Disable the excludes defined in your config files. Takes one of three options:
	      all == disable all excludes
	      main == disable excludes defined in [main] in yum.conf
	      repoid == disable excludes defined for that repo

       --disableplugin=plugin
	      Run with one or more plugins disabled, the argument is a comma separated list of wildcards to match against plugin names.

       --noplugins
	      Run with all plugins disabled.
	      Configuration Option: plugins

       --nogpgcheck
	      Run with GPG signature checking disabled.
	      Configuration Option: gpgcheck

       --skip-broken
	      Resolve depsolve problems by removing packages that are causing problems from the transaction.
	      Configuration Option: skip_broken

       -t, --tolerant
	      This option currently does nothing.

LIST OPTIONS

       The  following  are  the ways which you can invoke yum in list mode.  Note that all list commands include information on the version of the
       package.

       OUTPUT

	      The format of the output of yum list is:

	      name.arch ]version-release  repo or @installed-from-repo

       yum list [all | glob_exp1] [glob_exp2] [...]
	      List all available and installed packages.

       yum list available [glob_exp1] [...]
	      List all packages in the yum repositories available to be installed.

       yum list updates [glob_exp1] [...]
	      List all packages with updates available in the yum repositories.

       yum list installed [glob_exp1] [...]
	      List the packages specified by args.  If an argument does not match the name of  an  available  package,	it  is	assumed  to  be  a
	      shell-style glob and any matches are printed.

       yum list extras [glob_exp1] [...]
	      List the packages installed on the system that are not available in any yum repository listed in the config file.

       yum list obsoletes [glob_exp1] [...]
	      List the packages installed on the system that are obsoleted by packages in any yum repository listed in the config file.

       yum list recent
	      List packages recently added into the repositories.

       Specifying package names
	      All  the	list options mentioned above take file-glob-syntax wildcards or package names as arguments, for example yum list available
	      'foo*' will list all available packages that match 'foo*'. (The single quotes will keep your shell from expanding the globs.)

CLEAN OPTIONS

       The following are the ways which you can invoke yum in clean mode. Note that "all files" in the commands below means  "all  files  in  cur-
       rently enabled repositories".  If you want to also clean any (temporarily) disabled repositories you need to use --enablerepo='*' option.

       yum clean expire-cache
	      Eliminate  the local data saying when the metadata and mirrorlists were downloaded for each repo. This means yum will revalidate the
	      cache for each repo. next time it is used. However if the cache is still valid, nothing significant was deleted.

       yum clean packages
	      Eliminate any cached packages from the system.  Note that packages are not automatically deleted after they are downloaded.

       yum clean headers
	      Eliminate all of the header files which yum uses for dependency resolution.

       yum clean metadata
	      Eliminate all of the files which yum uses to determine the remote availability of packages. Using this  option  will  force  yum	to
	      download all the metadata the next time it is run.

       yum clean dbcache
	      Eliminate the sqlite cache used for faster access to metadata.  Using this option will force yum to recreate the cache the next time
	      it is run.

       yum clean all
	      Runs yum clean packages and yum clean headers, yum clean metadata and yum clean dbcache as above.

MISC

       Specifying package names
	      A package can be referred to for install,update,list,remove etc with any of the following:

	      name
	      name.arch
	      name-ver
	      name-ver-rel
	      name-ver-rel.arch
	      name-epoch:ver-rel.arch
	      epoch:name-ver-rel.arch

	      For example: yum remove kernel-2.4.1-10.i686

PLUGINS

       Yum can be extended through the use of plugins. A plugin is a Python ".py" file which is installed in one of the directories  specified	by
       the pluginpath option in yum.conf. For a plugin to work, the following conditions must be met:

       1. The plugin module file must be installed in the plugin path as just described.

       2. The global plugins option in /etc/yum/yum.conf must be set to `1'.

       3. A configuration file for the plugin must exist in /etc/yum/pluginconf.d/<plugin_name>.conf and the enabled setting in this file must set
       to `1'. The minimal content for such a configuration file is:

	      [main]
	      enabled = 1

       See the yum.conf(5) man page for more information on plugin related configuration options.

FILES

       /etc/yum/yum.conf
       /etc/yum/version-groups.conf
       /etc/yum/repos.d/
       /etc/yum/pluginconf.d/
       /var/cache/yum/

SEE ALSO

       pkcon (1)
       yum.conf (5)
       yum-updatesd (8)
       package-cleanup (1)
       repoquery (1)
       yum-complete-transaction (1)
       yumdownloader (1)
       yum-utils (1)
       http://yum.baseurl.org/
       http://yum.baseurl.org/wiki/Faq
       yum search yum

AUTHORS

       See the Authors file included with this program.

BUGS

       There of course aren't any bugs, but if you find any, you should first consult the FAQ mentioned above and then	email  the  mailing  list:
       yum@lists.baseurl.org or filed in bugzilla.

Seth Vidal																    yum(8)