Provided by: yum_3.4.3-3_all 
NAME
yum.conf - Configuration file for yum(8).
DESCRIPTION
Yum uses a configuration file at /etc/yum/yum.conf.
Additional configuration files are also read from the directories set by the reposdir option (default is
`/etc/yum/repos.d'). See the reposdir option below for further details.
PARAMETERS
There are two types of sections in the yum configuration file(s): main and repository. Main defines all
global configuration options. There should be only one main section. The repository section(s) define the
configuration for each repository/server. There should be one or more repository sections.
[main] OPTIONS
The [main] section must exist for yum to do anything. It consists of the following options:
cachedir Directory where yum should store its cache and db files. The default is `/var/cache/yum'.
persistdir Directory where yum should store information that should persist over multiple runs.
The default is `/var/lib/yum'.
keepcache Either `1' or `0'. Determines whether or not yum keeps the cache of headers and packages
after successful installation. Default is '1' (keep files)
reposdir A list of directories where yum should look for .repo files which define repositories to
use. Default is `/etc/yum/repos.d'. Each file in this directory should contain one or more
repository sections as documented in [repository] options below. These will be merged with the
repositories defined in /etc/yum/yum.conf to form the complete set of repositories that yum will
use.
debuglevel Debug message output level. Practical range is 0-10. Default is `2'.
errorlevel Error message output level. Practical range is 0-10. Default is `2'.
rpmverbosity Debug scriptlet output level. 'info' is the default, other options are: 'critical',
'emergency', 'error', 'warn' and 'debug'.
protected_packages This is a list of packages that yum should never completely remove. They are
protected via. Obsoletes as well as user/plugin removals.
The default is: yum glob:/etc/yum/protected.d/*.conf So any packages which should be protected can
do so by including a file in /etc/yum/protected.d with their package name in it.
Also if this configuration is set to anything, then yum will protect the package corresponding to
the running version of the kernel.
protected_multilib Either `1' or `0'. This tells yum whether or not it should perform a check to
make sure that multilib packages are the same version. For example, if this option is off (rpm
behaviour) pkgA-1.x86_64 and pkgA-2.i386 can be installed at the same time. However this is very
rarely desired. Install only packages, like the kernel, are exempt from this check. The default
is `1'.
logfile Full directory and file name for where yum should write its log file.
gpgcheck Either `1' or `0'. This tells yum whether or not it should perform a GPG signature check
on packages. When this is set in the [main] section it sets the default for all repositories. The
default is `0'.
localpkg_gpgcheck Either `1' or `0'. This tells yum whether or not it should perform a GPG
signature check on local packages (packages in a file, not in a repositoy). The default is `0'.
repo_gpgcheck Either `1' or `0'. This tells yum whether or not it should perform a GPG signature
check on the repodata. When this is set in the [main] section it sets the default for all
repositories. The default is `0'.
skip_broken Either `1' or `0'. Resolve depsolve problems by removing packages that are causing
problems from the transaction.
assumeyes Either `1' or `0'. Determines whether or not yum prompts for confirmation of critical
actions. Default is `0' (do prompt).
Command-line option: -y
alwaysprompt Either `1' or `0'. Without this option, yum will not prompt for confirmation when the
list of packages to be installed exactly matches those given on the command line. Unless assumeyes
is enabled, it will still prompt for package removal, or when additional packages need to be
installed to fulfill dependencies. Default is `1'.
tolerant Either `1' or `0'. If enabled, then yum will be tolerant of errors on the command line
with regard to packages. For example: if you request to install foo, bar and baz and baz is
installed; yum won't error out complaining that baz is already installed. Default to `0' (not
tolerant).
Command-line option: -t
exclude List of packages to exclude from updates or installs. This should be a space separated
list. Shell globs using wildcards (eg. * and ?) are allowed.
exactarch Either `1' or `0'. Set to `1' to make yum update only update the architectures of
packages that you have installed. ie: with this enabled yum will not install an i686 package to
update an i386 package. Default is `1'.
installonlypkgs List of package provides that should only ever be installed, never updated.
Kernels in particular fall into this category. Defaults to kernel, kernel-bigmem, kernel-
enterprise, kernel-smp, kernel-modules, kernel-debug, kernel-unsupported, kernel-source, kernel-
devel, kernel-PAE, kernel-PAE-debug.
Note that because these are provides, and not just package names, kernel-devel will also apply to
kernel-debug-devel, etc.
installonly_limit Number of packages listed in installonlypkgs to keep installed at the same time.
Setting to 0 disables this feature. Default is '0'. Note that this functionality used to be in the
"installonlyn" plugin, where this option was altered via. tokeep. Note that as of version 3.2.24,
yum will now look in the yumdb for a installonly attribute on installed packages. If that
attribute is "keep", then they will never be removed.
kernelpkgnames List of package names that are kernels. This is really only here for the updating
of kernel packages and should be removed out in the yum 2.1 series.
showdupesfromrepos Either `0' or `1'. Set to `1' if you wish to show any duplicate packages from
any repository, from package listings like the info or list commands. Set to `0' if you want only
to see the newest packages from any repository. Default is `0'.
obsoletes This option only has affect during an update. It enables yum's obsoletes processing
logic. Useful when doing distribution level upgrades. See also the yum upgrade command
documentation for more details (yum(8)). Default is `true'.
Command-line option: --obsoletes
overwrite_groups Either `0' or `1'. Used to determine yum's behaviour if two or more repositories
offer the package groups with the same name. If overwrite_groups is `1' then the group packages of
the last matching repository will be used. If overwrite_groups is `0' then the groups from all
matching repositories will be merged together as one large group.
groupremove_leaf_only Either `0' or `1'. Used to determine yum's behaviour when the groupremove
command is run. If groupremove_leaf_only is `0' (default) then all packages in the group will be
removed. If groupremove_leaf_only is `1' then only those packages in the group that aren't
required by another package will be removed.
enable_group_conditionals Either `0' or `1'. Determines whether yum will allow the use of
conditionals packages. Default is `1' (package conditionals are allowed).
group_package_types List of the following: optional, default, mandatory. Tells yum which type of
packages in groups will be installed when 'groupinstall' is called. Default is: default,
mandatory
installroot Specifies an alternative installroot, relative to which all packages will be
installed.
Command-line option: --installroot
distroverpkg The package used by yum to determine the "version" of the distribution. This can be
any installed package. Default is `redhat-release'. You can see what provides this manually by
using: "yum whatprovides redhat-release".
diskspacecheck Either `0' or `1'. Set this to `0' to disable the checking for sufficient diskspace
before a RPM transaction is run. Default is `1' (perform the check).
tsflags Comma or space separated list of transaction flags to pass to the rpm transaction set.
These include 'noscripts', 'notriggers', 'nodocs', 'test', 'justdb' and 'nocontexts'. 'repackage'
is also available but that does nothing with newer rpm versions. You can set all/any of them.
However, if you don't know what these do in the context of an rpm transaction set you're best
leaving it alone. Default is an empty list.
recent Number of days back to look for `recent' packages added to a repository. Used by the list
recent command. Default is `7'.
retries Set the number of times any attempt to retrieve a file should retry before returning an
error. Setting this to `0' makes yum try forever. Default is `10'.
keepalive Either `0' or `1'. Set whether HTTP keepalive should be used for HTTP/1.1 servers that
support it. This can improve transfer speeds by using one connection when downloading multiple
files from a repository. Default is `1'.
timeout Number of seconds to wait for a connection before timing out. Defaults to 30 seconds. This
may be too short of a time for extremely overloaded sites.
http_caching Determines how upstream HTTP caches are instructed to handle any HTTP downloads that
Yum does. This option can take the following values:
`all' means that all HTTP downloads should be cached.
`packages' means that only RPM package downloads should be cached (but not repository metadata
downloads).
`none' means that no HTTP downloads should be cached.
The default is `all'. This is recommended unless you are experiencing caching related issues. Try
to at least use `packages' to minimize load on repository servers.
throttle Enable bandwidth throttling for downloads. This option can be expressed as a absolute
data rate in bytes/sec. An SI prefix (k, M or G) may be appended to the bandwidth value (eg.
`5.5k' is 5.5 kilobytes/sec, `2M' is 2 Megabytes/sec).
Alternatively, this option can specify the percentage of total bandwidth to use (eg. `60%'). In
this case the bandwidth option should be used to specify the maximum available bandwidth.
Set to `0' to disable bandwidth throttling. This is the default.
bandwidth Use to specify the maximum available network bandwidth in bytes/second. Used with the
throttle option (above). If throttle is a percentage and bandwidth is `0' then bandwidth
throttling will be disabled. If throttle is expressed as a data rate (bytes/sec) then this option
is ignored. Default is `0' (no bandwidth throttling).
sslcacert Path to the directory containing the databases of the certificate authorities yum should
use to verify SSL certificates. Defaults to none - uses system default
sslverify Boolean - should yum verify SSL certificates/hosts at all. Defaults to True.
Note that the plugin yum-rhn-plugin will force this value to true, and may alter other ssl
settings (like hostname checking), even if it the machine is not registered.
sslclientcert Path to the SSL client certificate yum should use to connect to repos/remote sites
Defaults to none.
Note that if you are using curl compiled against NSS (default in Fedora/RHEL), curl treats
sslclientcert values with the same basename as _identical_. This version of yum will check that
this isn't true and output an error when the repositories "foo" and "bar" violate this, like so:
sslclientcert basename shared between foo and bar
sslclientkey Path to the SSL client key yum should use to connect to repos/remote sites Defaults
to none.
history_record Boolean - should yum record history entries for transactions. This takes some disk
space, and some extra time in the transactions. But it allows how to know a lot of information
about what has happened before, and display it to the user with the history info/list/summary
commands. yum also provides the history undo/redo commands. Defaults to True.
Note that if history is recorded, yum uses that information to see if any modifications to the
rpmdb have been done outside of yum. These are always bad, from yum's point of view, and so yum
will issue a warning and automatically run some of "yum check" to try and find some of the worst
problems altering the rpmdb might have caused.
This means that turning this option off will stop yum from being able to detect when the rpmdb has
changed and thus. it will never warn you or automatically run "yum check". The problems will
likely still be there, and yumdb etc. will still be wrong but yum will not warn you about it.
history_record_packages This is a list of package names that should be recorded as having helped
the transaction. yum plugins have an API to add themselves to this, so it should not normally be
necessary to add packages here. Not that this is also used for the packages to look for in
--version. Defaults to rpm, yum, yum-metadata-parser.
history_list_view Which column of information to display in the "yum history list" command. There
are currently three options: users, cmds (or commands), auto.
Older versions of yum acted like "users", which always outputs the user who initiated the yum
transaction. You can now specify "commands" which will instead always output the command line of
the transaction. You can also specify "single-user-commands" which will display the users if there
are more than one, otherwise it will display the command line.
You can also specify "default" which currently selects "single-user-commands".
commands List of functional commands to run if no functional commands are specified on the command
line (eg. "update foo bar baz quux"). None of the short options (eg. -y, -e, -d) are accepted for
this option.
syslog_ident Identification (program name) for syslog messages.
syslog_facility Facility name for syslog messages, see syslog(3). Default is `LOG_USER'.
syslog_device Where to log syslog messages. Can be a local device (path) or a host:port string to
use a remote syslog. If empty or points to a nonexistent device, syslog logging is disabled.
Default is `/dev/log'.
proxy URL to the proxy server that yum should use.
proxy_username username to use for proxy
proxy_password password for this proxy
username username to use for basic authentication to a repo or really any url.
password password to use with the username for basic authentication.
plugins Either `0' or `1'. Global switch to enable or disable yum plugins. Default is `0' (plugins
disabled). See the PLUGINS section of the yum(8) man for more information on installing yum
plugins.
pluginpath A list of directories where yum should look for plugin modules. Default is
`/usr/share/yum-plugins' and `/usr/lib/yum-plugins'.
pluginconfpath A list of directories where yum should look for plugin configuration files.
Default is `/etc/yum/pluginconf.d'.
metadata_expire Time (in seconds) after which the metadata will expire. So that if the current
metadata downloaded is less than this many seconds old then yum will not update the metadata
against the repository. If you find that yum is not downloading information on updates as often
as you would like lower the value of this option. You can also change from the default of using
seconds to using days, hours or minutes by appending a d, h or m respectively. The default is 6
hours, to compliment yum-updatesd running once an hour. It's also possible to use the word
"never", meaning that the metadata will never expire. Note that when using a metalink file the
metalink must always be newer than the metadata for the repository, due to the validation, so this
timeout also applies to the metalink file.
mirrorlist_expire Time (in seconds) after which the mirrorlist locally cached will expire. If the
current mirrorlist is less than this many seconds old then yum will not download another copy of
the mirrorlist, it has the same extra format as metadata_expire. If you find that yum is not
downloading the mirrorlists as often as you would like lower the value of this option.
mdpolicy You can select from different metadata download policies depending on how much data you
want to download with the main repository metadata index. The advantages of downloading more
metadata with the index is that you can't get into situations where you need to use that metadata
later and the versions available aren't compatible (or the user lacks privileges) and that if the
metadata is corrupt in any way yum will revert to the previous metadata.
`instant' - Just download the new metadata index, this is roughly what yum always did, however it
now does some checking on the index and reverts if it classifies it as bad.
`group:primary' - Download the primary metadata with the index. This contains most of the package
information and so is almost always required anyway. This is the default.
`group:small' - With the primary also download the updateinfo metadata, this is required for yum-
security operations and it also used in the graphical clients. This file also tends to be
significantly smaller than most others.
`group:main' - With the primary and updateinfo download the filelists metadata and the group
metadata. The filelists data is required for operations like "yum install /bin/bash", and also
some dependency resolutions require it. The group data is used in some graphical clients and for
group operations like "yum grouplist Base".
`group:all' - Download all metadata listed in the index, currently the only one not listed above
is the other metadata, which contains the changelog information which is used by yum-changelog.
This is what "yum makecache" uses.
multilib_policy Can be set to 'all' or 'best'. All means install all possible arches for any
package you want to install. Therefore yum install foo will install foo.i386 and foo.x86_64 on
x86_64, if it is available. Best means install the best arch for this platform, only.
bugtracker_url URL where bugs should be filed for yum. Configurable for local versions or distro-
specific bugtrackers.
color Whether to display colorized output automatically, depending on the output terminal, can be
changed to always (using ANSI codes) or never. Default is `auto'. Possible values are: auto,
never, always. Command-line option: --color
color_list_installed_older The colorization/highlighting for packages in list/info installed which
are older than the latest available package with the same name and arch. Default is `bold'.
Possible values are a comma separated list containing: bold, blink, dim, reverse, underline,
fg:black, fg:red, fg:green, fg:yellow, fg:blue, fg:magenta, fg:cyan, fg:white, bg:black, bg:red,
bg:green, bg:yellow, bg:blue, bg:magenta, bg:cyan, bg:white.
color_list_installed_newer The colorization/highlighting for packages in list/info installed which
are newer than the latest available package with the same name and arch. Default is
`bold,yellow'. See color_list_installed_older for possible values.
color_list_installed_reinstall The colorization/highlighting for packages in list/info installed
which is the same version as the latest available package with the same name and arch. Default is
`normal'. See color_list_installed_older for possible values.
color_list_installed_extra The colorization/highlighting for packages in list/info installed which
has no available package with the same name and arch. Default is `bold,red'. See
color_list_installed_older for possible values.
color_list_available_upgrade The colorization/highlighting for packages in list/info available
which is an upgrade for the latest installed package with the same name and arch. Default is
`bold,blue'. See color_list_installed_older for possible values.
color_list_available_downgrade The colorization/highlighting for packages in list/info available
which is a downgrade for the latest installed package with the same name and arch. Default is
`dim,cyan'. See color_list_installed_older for possible values.
color_list_available_install The colorization/highlighting for packages in list/info available
which has no installed package with the same name and arch. Default is `normal'. See
color_list_installed_older for possible values.
color_list_available_reinstall The colorization/highlighting for packages in list/info available
which is the same version as the installed package with the same name and arch. Default is
`bold,underline,green. See color_list_installed_older for possible values.
color_search_match The colorization/highlighting for text matches in search. Default is `bold'.
See color_list_installed_older for possible values.
color_update_installed The colorization/highlighting for packages in the "updates list" which are
installed. The updates list is what is printed when you run "yum update", "yum list updates", "yum
list obsoletes" and "yum check-update". Default is `normal'. See color_list_installed_older for
possible values.
color_update_local The colorization/highlighting for packages in the "updates list" which are
already downloaded. The updates list is what is printed when you run "yum update", "yum list
updates", "yum list obsoletes" and "yum check-update". Default is `bold'. See
color_list_installed_older for possible values.
color_update_remote The colorization/highlighting for packages in the "updates list" which need to
be downloaded. The updates list is what is printed when you run "yum update", "yum list updates",
"yum list obsoletes" and "yum check-update". Default is `normal'. See color_list_installed_older
for possible values.
clean_requirements_on_remove When removing packages (by removal, update or obsoletion) go through
each package's dependencies. If any of them are no longer required by any other package then also
mark them to be removed. Boolean (1, 0, True, False, yes,no) Defaults to False
[repository] OPTIONS
The repository section(s) take the following form:
Example: [repositoryid]
name=Some name for this repository
baseurl=url://path/to/repository/
repositoryid Must be a unique name for each repository, one word.
name A human readable string describing the repository.
baseurl Must be a URL to the directory where the yum repository's `repodata' directory lives. Can
be an http://, ftp:// or file:// URL. You can specify multiple URLs in one baseurl statement. The
best way to do this is like this:
[repositoryid]
name=Some name for this repository
baseurl=url://server1/path/to/repository/
url://server2/path/to/repository/
url://server3/path/to/repository/
If you list more than one baseurl= statement in a repository you will find yum will ignore the
earlier ones and probably act bizarrely. Don't do this, you've been warned.
You can use HTTP basic auth by prepending "user:password@" to the server name in the baseurl line.
For example: "baseurl=http://user:passwd@example.com/".
metalink Specifies a URL to a metalink file for the repomd.xml, a list of mirrors for the entire
repository are generated by converting the mirrors for the repomd.xml file to a baseurl. The
metalink file also contains the latest timestamp from the data in the repomd.xml, the length of
the repomd.xml and checksum data. This data is checked against any downloaded repomd.xml file and
all of the information from the metalink file must match. This can be used instead of or with the
baseurl option. Substitution variables, described below, can be used with this option. This option
disables the mirrorlist option. As a special hack is the mirrorlist URL contains the word
"metalink" then the value of mirrorlist is copied to metalink (if metalink is not set).
mirrorlist Specifies a URL to a file containing a list of baseurls. This can be used instead of or
with the baseurl option. Substitution variables, described below, can be used with this option.
As a special hack is the mirrorlist URL contains the word "metalink" then the value of mirrorlist
is copied to metalink (if metalink is not set).
enabled Either `1' or `0'. This tells yum whether or not use this repository.
gpgcheck Either `1' or `0'. This tells yum whether or not it should perform a GPG signature check
on the packages gotten from this repository.
repo_gpgcheck Either `1' or `0'. This tells yum whether or not it should perform a GPG signature
check on the repodata from this repository.
gpgkey A URL pointing to the ASCII-armored GPG key file for the repository. This option is used if
yum needs a public key to verify a package and the required key hasn't been imported into the RPM
database. If this option is set, yum will automatically import the key from the specified URL. You
will be prompted before the key is installed unless the assumeyes option is set.
Multiple URLs may be specified here in the same manner as the baseurl option (above). If a GPG key
is required to install a package from a repository, all keys specified for that repository will be
installed.
gpgcakey A URL pointing to the ASCII-armored CA key file for the repository. This is a normal gpg
public key - but this key will be used to validate detached signatures of all other keys. The idea
is you are asked to confirm import for this key. After that any other gpg key needed for package
or repository verification, if it has a detached signature which matches this key will be
automatically imported without user confirmation.
exclude Same as the [main] exclude option but only for this repository. Substitution variables,
described below, are honored here.
includepkgs Inverse of exclude. This is a list of packages you want to use from a repository. If
this option lists only one package then that is all yum will ever see from the repository.
Defaults to an empty list. Substitution variables, described below, are honored here.
enablegroups Either `0' or `1'. Determines whether yum will allow the use of package groups for
this repository. Default is `1' (package groups are allowed).
failovermethod Either `roundrobin' or `priority'.
`roundrobin' randomly selects a URL out of the list of URLs to start with and proceeds through
each of them as it encounters a failure contacting the host.
`priority' starts from the first baseurl listed and reads through them sequentially.
failovermethod defaults to `roundrobin' if not specified.
keepalive Either `1' or `0'. This tells yum whether or not HTTP/1.1 keepalive should be used with
this repository. See the global option in the [main] section above for more information.
timeout Overrides the timeout option from the [main] section for this repository.
http_caching Overrides the http_caching option from the [main] section for this repository.
retries Overrides the retries option from the [main] section for this repository.
throttle Overrides the throttle option from the [main] section for this repository.
bandwidth Overrides the bandwidth option from the [main] section for this repository.
sslcacert Overrides the sslcacert option from the [main] section for this repository.
sslverify Overrides the sslverify option from the [main] section for this repository.
sslclientcert Overrides the sslclientcert option from the [main] section for this repository.
sslclientkey Overrides the sslclientkey option from the [main] section for this repository.
metadata_expire Overrides the metadata_expire option from the [main] section for this repository.
mirrorlist_expire Overrides the mirrorlist_expire option from the [main] section for this
repository.
proxy URL to the proxy server for this repository. Set to '_none_' to disable the global proxy
setting for this repository. If this is unset it inherits it from the global setting
proxy_username username to use for proxy. If this is unset it inherits it from the global setting
proxy_password password for this proxy. If this is unset it inherits it from the global setting
username username to use for basic authentication to a repo or really any url. If this is unset
it inherits it from the global setting
password password to use with the username for basic authentication. If this is unset it inherits
it from the global setting
cost relative cost of accessing this repository. Useful for weighing one repo's packages as
greater/less than any other. defaults to 1000
skip_if_unavailable If set to True yum will continue running if this repository cannot be
contacted for any reason. This should be set carefully as all repos are consulted for any given
command. Defaults to False.
URL INCLUDE SYNTAX
The inclusion of external configuration files is supported for /etc/yum/yum.conf and the .repo files in
the /etc/yum/repos.d directory. To include a URL, use a line of the following format:
include=url://to/some/location
The configuration file will be inserted at the position of the "include=" line. Included files may
contain further include lines. Yum will abort with an error if an inclusion loop is detected.
GLOB: FOR LIST OPTIONS
Any of the configurations options which are a list of items can be specfied using the glob syntax:
glob:/etc/path/somewhere.d/*.conf. This will read in all files matching that glob and include all lines
in each file (excluding comments and blank lines) as items in the list.
VARIABLES
There are a number of variables you can use to ease maintenance of yum's configuration files. They are
available in the values of several options including name, baseurl and commands.
$releasever This will be replaced with the value of the version of the package listed in
distroverpkg. This defaults to the version of `redhat-release' package.
$arch This will be replaced with your architecture as listed by os.uname()[4] in Python.
$basearch This will be replaced with your base architecture in yum. For example, if your $arch is
i686 your $basearch will be i386.
$uuid This will be replaced with a unique but persistent uuid for this machine. The value that is
first generated will be stored in /var/lib/yum/uuid and reused until this file is deleted.
$YUM0-$YUM9 These will be replaced with the value of the shell environment variable of the same
name. If the shell environment variable does not exist then the configuration file variable will
not be replaced.
As of 3.2.28, any file in /etc/yum/vars is turned into a variable named after the filename (or overrides
any of the above variables).
Note that no warnings/errors are given if the files are unreadable, so creating files that only root can
read may be confusing for users.
Also note that only the first line will be read and all new line characters are removed, as a
convenience. However, no other checking is performed on the data. This means it is possible to have bad
character data in any value.
FILES
/etc/yum/yum.conf
/etc/yum/repos.d/
/etc/yum/pluginconf.d/
/etc/yum/protected.d
/etc/yum/vars
SEE ALSO
yum(8)
Seth Vidal yum.conf(5)