Yum (Linux)

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yum

yumInstalling and Removing Packages Using yumA software package, or simply package, is the collection of scripts, programs, files, and directories required to install and run an application, utility, server, or system software.

A package also includes a list of other packages the package depends on (dependencies). Using software packages makes it easier to install, update, and uninstall software.

A package contains either executable files or source code files. Executable files are precompiled for a specific processor architecture and operating system, whereas source files need to be compiled but will run on a wide range of machines and operating systems.A PMS, or package management system, is a set of utilities that allow you to install, upgrade, remove, and search software packages easily and in a consistent manner. It is based on a local database that holds information about each installed package, including its dependencies and version information.

PackageKit (www.packagekit.org) is a front end for several PMSs, providing a uniform interface. Fedora, Kubuntu, and SUSE use PackageKit. The gnome-packagekit package holds graphical tools designed for the GNOME desktop; each of these tools is named gpk*.

/etc/yum.repos.dThe following example calls yum to install the tcsh shell, which is part of the tcsh package. After yum determines what it needs to do, it asks for confirmation. Reply y if you want to continue or n to quit.

# yum install tcshLoaded plugins: langpacks, presto, refresh-packagekitSetting up Install ProcessResolving Dependencies--> Running transaction check---> Package tcsh.i686 0:6.17-15.fc15 will be installed--> Finished Dependency ResolutionDependencies Resolved================================================================================Package Arch Version Repository Size================================================================================Installing:tcsh i686 6.17-15.fc15 updates-testing 403 kTransaction Summary================================================================================Install 1 Package(s)Total download size: 403 kInstalled size: 1.1 MIs this ok [y/N]: yDownloading Packages:Setting up and reading Presto delta metadataProcessing delta metadataPackage(s) data still to download: 403 ktcsh-6.17-15.fc15.i686.rpm | 403 kB 00:01Running rpm_check_debugRunning Transaction TestTransaction Test SucceededRunning TransactionInstalling : tcsh-6.17-15.fc15.i686 1/1Installed:tcsh.i686 0:6.17-15.fc15Complete!Automatically Installs dependenciesThe next command installs the ypbind (NIS) package. Because this package dependson other packages that are not installed (rpcbind and yp-tools), yum lists the packageunder Installing for dependencies and installs them automatically. The yum utilityasks for confirmation before installing the packages.# yum install ypbindLoaded plugins: langpacks, presto, refresh-packagekitSetting up Install ProcessResolving Dependencies--> Running transaction check---> Package ypbind.i686 3:1.32-5.fc15 will be installed--> Processing Dependency: yp-tools for package: 3:ypbind-1.32-5.fc15.i686--> Processing Dependency: rpcbind for package: 3:ypbind-1.32-5.fc15.i686--> Running transaction check---> Package rpcbind.i686 0:0.2.0-10.fc15 will be installed---> Package yp-tools.i686 0:2.12-4.fc15 will be installed--> Finished Dependency ResolutionDependencies Resolved================================================================================Package Arch Version Repository Size================================================================================Installing:ypbind i686 3:1.32-5.fc15 fedora 55 kInstalling for dependencies:rpcbind i686 0.2.0-10.fc15 fedora 47 kyp-tools i686 2.12-4.fc15 fedora 69 kTransaction Summary================================================================================Install 3 Package(s)Total download size: 171 kInstalled size: 345 kIs this ok [y/N]: yyum remove You can also use yum to remove packages, using a similar syntax. The followingexample removes the tcsh package:# yum remove tcshLoaded plugins: langpacks, presto, refresh-packagekitSetting up Remove ProcessResolving Dependencies--> Running transaction check---> Package tcsh.i686 0:6.17-15.fc15 will be erased--> Finished Dependency ResolutionDependencies Resolved================================================================================Package Arch Version Repository Size================================================================================Removing:tcsh i686 6.17-15.fc15 @updates-testing 1.1 MTransaction Summary================================================================================Remove 1 Package(s)Installed size: 1.1 MIs this ok [y/N]: yDownloading Packages:Running rpm_check_debugRunning Transaction TestTransaction Test SucceededRunning TransactionErasing : tcsh-6.17-15.fc15.i686 1/1Removed:tcsh.i686 0:6.17-15.fc15Complete!AutomaticallyremovesdependenciesWhen yum removes a package, it also removes packages that are dependent on thepackage it is removing. The following example removes ypbind and its dependency,yp-tools. It does not remove rpcbind because another installed package mightdepend on rpcbind.# yum remove ypbindLoaded plugins: langpacks, presto, refresh-packagekitSetting up Remove ProcessResolving Dependencies--> Running transaction check---> Package ypbind.i686 3:1.32-5.fc15 will be erased--> Processing Dependency: ypbind for package: yp-tools-2.12-4.fc15.i686--> Running transaction check---> Package yp-tools.i686 0:2.12-4.fc15 will be erased--> Finished Dependency ResolutionDependencies Resolved================================================================================Package Arch Version Repository Size================================================================================Removing:ypbind i686 3:1.32-5.fc15 @fedora 91 kRemoving for dependencies:yp-tools i686 2.12-4.fc15 @fedora 167 kTransaction Summary================================================================================Remove 2 Package(s)Installed size: 258 kIs this ok [y/N]: yFinding the Package That Holds an Application or File You NeedFinding a package with a name that sounds like...The yum search command (next page) searches package names, descriptions, and summaries.The yum list command (next page) searches package names only.

$ yum whatprovides "*X11/Xlib.h"Loaded plugins: langpacks, presto, refresh-packagekit...libX11-devel-1.4.2-1.fc15.i686 : Development files for libX11Repo : fedoraMatched from:Filename : /usr/include/X11/Xlib.hThe most likely candidate is the entry shown in the preceding example, which is themost generic. You can install this package using the following command:# yum install libX11-develyum search The yum search command searches for a string in the package description, summary,and name fields. The following example searches for packages that have the stringvim in these fields:$ yum search vimLoaded plugins: langpacks, presto, refresh-packagekitupdates-testing/pkgtags | 44 kB 00:00=============================== N/S Matched: vim ===============================glusterfs-vim.i686 : Vim syntax fileperl-Text-VimColor.noarch : Syntax color text in HTML or XML using Vimuzbl-vim.i686 : Vim highlighting for uzbl's configvim-X11.i686 : The VIM version of the vi editor for the X Window Systemvim-clustershell.noarch : VIM files for ClusterShellvim-common.i686 : The common files needed by any version of the VIM editorThe yum list command searches for a package name field that matches a string.Specify list available without an argument to list all packages that can be installedfrom the yum repositories. The following example searches for packages whosename fields match the string *emacs*:$ yum list '*emacs*'Loaded plugins: langpacks, presto, refresh-packagekitAvailable Packagesclips-emacs.noarch 6.30.0-0.3.20090722svn.fc15 fedoracoq-emacs.i686 8.2pl1-1.fc12 fedoracrm114-emacs.i686 0-2.14.20100106.fc15 fedoracvc3-emacs.noarch 2.2-3.fc15 fedoracvc3-emacs-el.noarch 2.2-3.fc15 fedoracvc3-xemacs.noarch 2.2-3.fc15 fedoracvc3-xemacs-el.noarch 2.2-3.fc15 fedoraemacs.i686 1:23.2-17.fc15 fedorayum: Keeps the System Up-to-DateThis section continues to describe yum. It covers updating installed packages, yumcommands and groups, downloading RPM package files, configuring yum, andadding a repository specification. Refer to yum.baseurl.org for more information.Updating PackagesThe yum update command, without additional parameters, updates all installed packages.

# yum updateLoaded plugins: langpacks, presto, refresh-packagekitSetting up Update ProcessResolving Dependencies--> Running transaction check---> Package gnome-games.i686 1:2.91.93-1.fc15 will be updated---> Package gnome-games.i686 1:2.91.94-0.20110331.1.fc15 will be an update---> Package xorg-x11-server-Xorg.i686 0:1.10.0-3.fc15 will be updated---> Package xorg-x11-server-Xorg.i686 0:1.10.0-7.fc15 will be an update--> Finished Dependency ResolutionDependencies Resolved================================================================================Package Arch Version Repository Size================================================================================Updating:gnome-games i686 1:2.91.94-0.20110331.1.fc15 updates-testing 2.4 Mxorg-x11-server-Xorg i686 1.10.0-7.fc15 updates-testing 1.4 MTransaction Summary================================================================================Upgrade 2 Package(s)Total download size: 3.8 MIs this ok [y/N]: yDownloading Packages:Setting up and reading Presto delta metadataProcessing delta metadataDownload delta size: 1.2 M(1/2): gnome-games-2.91.93-1.fc15_2.91.94-0.20110331.1.f | 341 kB 00:02(2/2): xorg-x11-server-Xorg-1.10.0-3.fc15_1.10.0-7.fc15. | 870 kB 00:06Finishing rebuild of rpms, from deltarpms | 3.8 MB 00:02Presto reduced the update size by 69% (from 3.8 M to 1.2 M).Running rpm_check_debugRunning T