Provided by: yum_3.4.3-3ubuntu1_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)