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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 pro-
       cessing	based  on "repository" metadata. It can also perform installa-
       tion of new packages, removal of old packages and  perform  queries  on
       the  installed and/or available packages among many other commands/ser-
       vices (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] [...]
	* update-to [package1] [package2] [...]
	* check-update
	* upgrade [package1] [package2] [...]
	* upgrade-to [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]
	* 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.
	      "_sqlitecache.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.

	      Note  that  "update" works on installed packages first, and only
	      if there are no matches does it look for available packages. The
	      difference  is most noticable when you do "update foo-1-2" which
	      will act exactly as "update foo" if foo-1-2  is  installed.  You
	      can  use	the "update-to" if you'd prefer that nothing happen in
	      the above case.


       update-to
	      This command works like "update" but always specifies  the  ver-
	      sion of the package we want to update to.


       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 pkgs 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.


       upgrade-to
	      This command works like "upgrade" but always specifies the  ver-
	      sion of the package we want to update to.


       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 descrip-
	      tion, 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 section 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 groupid's are dis-
	      played.


       groupremove
	      Is used to remove	 all  of  the  packages	 in  a	group,	unlike
	      "groupinstall"   this   will  remove  everything	regardless  of
	      group_package_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  sim-
	      ple  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. If the first argument is  'enabled',
	      'disabled'  or  'all'  then the command will list those types of
	      repos.

	      You can pass repo id or name arguments, or  wildcards  which  to
	      match  against  both of those. However if the ir or name matches
	      exactly then the repo will be listed even	 if  you  are  listing
	      enabled repos. and it is disabled.

	      In  non-verbose  mode  the first column will start with a '*' if
	      the repo. has metalink data  and	the  latest  metadata  is  not
	      local.  For  non-verbose	mode the last column will also display
	      the number of packages in the repo. and (if there are  any  user
	      specified excludes) the number of packages excluded.

	      One last special feature of repolist, is that if you are in non-
	      verbose mode then yum will ignore any repo errors and output the
	      information  it  can  get	 (Eg. "yum clean all; yum -C repolist"
	      will output something, although the package counts/etc. will  be
	      zeroed out).


       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, 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 exits.

       --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  dis-
	      abled 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
	      commands (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 pack-
       age.


       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 reposito-
	      ries.


       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 wild-
	      cards or package names as arguments, for example yum list avail-
	      able '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 currently
       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 mir-
	      rorlists were downloaded for each	 repo.	This  means  yum  will
	      revalidate  the  cache for each repo. next time it is used. How-
	      ever if the  cache  is  still  valid,  nothing  significant  was
	      deleted.


       yum clean packages
	      Eliminate	 any cached packages from the system.  Note that pack-
	      ages 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 meta-
	      data 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/plugin-
       conf.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.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://linux.duke.edu/yum/
       http://wiki.linux.duke.edu/YumFaq
       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.linux.duke.edu or filed in bugzilla.



Seth Vidal								yum(8)
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