man yum

[root@localhost ~]# man yum
yum(8)                                                                  yum(8)

NAME
       yum - Yellowdog Updater Modified

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

DESCRIPTION
       yum is an interactive, automated update program which can be used for maintaining systems using rpm

       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]
        * groupremove group1 [group2] [...]
        * groupinfo group1 [...]
        * search string1 [string2] [...]
        * shell [filename]
        * resolvedep dep1 [dep2] [...]
        * localinstall rpmfile1 [rpmfile2] [...]
        * localupdate rpmfile1 [rpmfile2] [...]
        * deplist package1 [package2] [...]
        * repolist [all|enabled|disabled]

       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 depen-
              dencies 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.

       update If run without any packages, update will update every currently installed package.  If one or more pack-
              ages are specified, Yum will only update the listed packages.  While updating packages, yum will  ensure
              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 --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 pkgs to be updated in list format. Returns 0 and no packages are available for update.

       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.

       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, packager  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.

       shell  Is used to enter the 鈥檡um shell鈥? 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 depen-
              dency.

       localinstall
              Is used to install a set of local rpm files. If required  the  enabled  repositories  will  be  used  to
              resolve dependencies.

       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.

       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.

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: assume-yes

       -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 per-
              form the requested action.

       --version
              Reports the yum version number and exits.

       --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麓s obsoletes processing logic. For more infor-
              mation see the update command above.
              Configuration Option: obsoletes

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

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

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

LIST OPTIONS
       The following are the ways which you can invoke yum in list mode.  Note that all list commands include informa-
       tion on the version of the package.

       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 鈥檉oo*鈥?[0m will list all available packages that match 鈥檉oo*鈥? (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=鈥?鈥?[0m option.

       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 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 鈥?鈥?

       3.  A  configuration file for the plugin must exist in /etc/yum/pluginconf.d/.conf and the enabled
       setting in this file must set to 鈥?鈥? 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/repos.d/
       /etc/yum/pluginconf.d/
       /var/cache/yum/

SEE ALSO
       yum.conf (5)
      
      

AUTHORS
       See the Authors file included with this program.

BUGS
       There of course aren鈥檛 any bugs, but if you find any, you should first consult the Faq mentioned above and then
       email the mailing list: or filed in bugzilla.

Seth Vidal                                                              yum(8)
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