Linux: yum配置说明

下面是利用 man yum.conf 命令获取到的有关yum配置的说明：

yum.conf(5) yum configuration file yum.conf(5)

NAME

yum.conf - Configuration file for yum(8).

DESCRIPTION

Yum 使用到的配置文件位置：/etc/yum.conf.
也可以从其他位置找配置文件，例如yum 仓库配置(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.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 (pack‐
ages 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'.

payload_gpgcheck Either `1' or `0'. This tells yum whether or not it should also perform a GPG signature check on the payload (part
of a package holding the actual files that comprise the package).

By default, yum only performs GPG signature checks on package headers. Thus, if the payload data has been tampered with or cor‐
rupted, yum will fail in the middle of the transaction due to an RPM unpacking error, after some unverified scriptlets might have
already run, and possibly leave the package in question partly installed.

To prevent all of that, you can enable this option to extend the signature check to also include the payload, so that yum can avoid
running the transaction in case of payload corruption. This slightly improves security, however at the expense of significantly
increased transaction time, so you may want to only use this option when package corruption is a concern.

For this option to have effect, make sure to also enable gpgcheck (or localpkg_gpgcheck for local packages).

When this option 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 --assumeyes

assumeno Either `1' or `0'. If yum would prompt for confirmation of critical actions, assume the user chose no. This is basically the
same as doing "echo | yum ..." but is a bit more usable. This option overrides assumeyes, but is still subject to alwaysprompt.
Default is `0' (do prompt).
Command-line option: --assumeno

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 when additional packages need to
be installed to fulfill dependencies. Note that older versions of yum would also always prompt for package removal, and that is no
longer true. Default is `1'.

tolerant Either `1' or `0'. If enabled, yum will go slower, checking for things that shouldn't be possible making it more tolerant of
external errors. Default to `0' (not tolerant).
Command-line option: -t

exclude List of packages to exclude from all repositories, so yum works as if that package was never in the repositories. This should
be a space separated list. This is commonly used so a package isn't upgraded or installed accidentally, but can be used to remove
packages in any way that "yum list" will show packages. Shell globs using wildcards (eg. * and ?) are allowed.

Can be disabled using disable_excludes or --disableexcludes. Command-line option: -x

disable_excludes A way to permanently set the --disableexcludes command line option.

query_install_excludes This applies the command line exclude option (only, not the configuration exclude above) to installed packages
being shown in some query commands (currently: list/info/search/provides). Default is '0'.

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-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.

Note that "kernel-modules" is not in this list, in RHEL-6, and so anything providing that is updated like any other package.

installonly_limit Number of packages listed in installonlypkgs to keep installed at the same time. Setting to 0 disables this fea‐
ture. Default is '3'. 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 list‐
ings 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

remove_leaf_only Either `0' or `1'. Used to determine yum's behaviour when a package is removed. If remove_leaf_only is `0'
(default) then packages, and their deps, will be removed. If remove_leaf_only is `1' then only those packages that aren't required
by another package will be removed.

repopkgsremove_leaf_only Either `0' or `1'. Used to determine yum's behaviour when the repo-pkg remove command is run. If repopkgre‐
move_leaf_only is `0' (default) then all packages in the repo. will be removed. If repopkgremove_leaf_only is `1' then only those
packages in the repo. that aren't required by another package will be removed. Note that this option does not override
remove_leaf_only, so enabling that option means this has almost no affect.

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. Note that this option does not over‐
ride remove_leaf_only, so enabling that option means this has almost no affect.

groupremove_leaf_only Either `0' or `1'. Used to determine yum's behaviour when the groupremove command is run. If groupre‐
move_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

group_command List of the following: simple, compat, objects. Tells yum what to do for group install/upgrade/remove commands.

Simple acts like you did yum group cmd $(repoquery --group --list group), so it is vrery easy to reason about what will happen. Alas.
this is often not what people want to happen.

Compat. works much like simple, except that when you run "group upgrade" it actually runs "group install" (this means that you get
any new packages added to the group, but you also get packages added that were there before and you didn't want).

Objects makes groups act like a real object, separate from the packages they contain. Yum keeps track of the groups you have
installed, so "group upgrade" will install new packages for the group but not install old ones. It also knows about group members
that are installed but weren't installed as part of the group, and won't remove those on "group remove". Running "yum upgrade" will
also run "yum group upgrade" (thus. adding new packages for all groups).

Default is: objects

upgrade_group_objects_upgrade Either `0' or `1'. Set this to `0' to disable the automatic running of "group upgrade" when running the
"upgrade" command, and group_command is set to "objects". Default is `1' (perform the operation).

autocheck_running_kernel Either `0' or `1'. Set this to `0' to disable the automatic checking of the running kernel against update‐
info ("yum updateinfo check-running-kernel"), in the "check-update" and "updateinfo summary" commands. Default is `1' (perform the
check).

installroot Specifies an alternative installroot, relative to which all packages will be installed.
Command-line option: --installroot

config_file_path Specifies the path to main the configuration file. Default is /etc/yum/yum.conf.

check_config_file_age Either `0' or `1'. Specifies whether yum should auto metadata expire repos. that are older than any of the
configuration files that led to them (usually the yum.conf file and the foo.repo file). Default is `1' (perform the check).

distroverpkg The package used by yum to determine the "version" of the distribution, this sets $releasever for use in config. files.
This can be any installed package. Default is `system-release(releasever)', `redhat-release'. Yum will now look at the version pro‐
vided by the provide, and if that is non-empty then will use the full V(-R), otherwise it uses the version of the package.
You can see what provides this manually by using: "yum whatprovides 'system-release(releasever)' redhat-release" and you can see
what $releasever is most easily by using: "yum version".

diskspacecheck Either `0' or `1'. Set this to `0' to disable the checking for sufficient diskspace and inodes before a RPM transac‐
tion 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', 'notrig‐
gers', '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. Also see the "yum fs" command, for excluding docs.

override_install_langs This is a way to override rpm's _install_langs macro. without having to change it within rpm's macro file.
Default is nothing (so does nothing). Also see the "yum fs" command.

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 trans‐
fer 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).

`lazy:packages' means that act like `packages' unless package verification fails (e.g. the package download doesn't match the
expected checksum), in which case try re-downloading the package as if `none' was set. This value is a good compromise if you want
to avoid issues caused by stale proxy cache after remote RPMs change contents without changing filenames (e.g. are pushed unsigned
and later signed) but still want the benefits of package caching whenever possible.

`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 mini‐
mize 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.

Note that when multiple downloads run simultaneously the total bandwidth might exceed the throttle limit. You may want to also set
max_connections=1 or scale your throttle option down accordingly.

minrate This sets the low speed threshold in bytes per second. If the server is sending data slower than this for at least `timeout'
seconds, Yum aborts the connection. The default is `1000'.

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).

ip_resolve Determines how yum resolves host names.

`4' or `IPv4': resolve to IPv4 addresses only.

`6' or `IPv6': resolve to IPv6 addresses only.

max_connections

The maximum number of simultaneous connections. This overrides the urlgrabber default of 5 connections. Note that there are also
implicit per-mirror limits and the downloader honors these too.

ftp_disable_epsv This options disables Extended Passive Mode (the EPSV command) which does not work correctly on some buggy ftp
servers. Default is `0' (EPSV enabled).

deltarpm

When non-zero, delta-RPM files are used if available. The value specifies the maximum number of "applydeltarpm" processes Yum will
spawn, if the value is negative then yum works out how many cores you have and multiplies that by the value (cores=2, deltarpm=-2; 4
processes). (2 by default).

Note that the "applydeltarpm" process uses a significant amount of disk IO, so running too many instances can significantly slow down
all disk IO including the downloads that yum is doing (thus. a too high value can make everything slower).

deltarpm_percentage When the relative size of delta vs pkg is larger than this, delta is not used. Default value is 75 (Deltas must
be at least 25% smaller than the pkg). Use `0' to turn off delta rpm processing. Local repositories (with file:// baseurl) have
delta rpms turned off by default.

deltarpm_metadata_percentage When the relative size of deltarpm metadata vs pkgs is larger than this, deltarpm metadata is not down‐
loaded from the repo. Default value is 100 (Deltarpm metadata must be smaller than the packages from the repo). Note that you can
give values over 100, so 200 means that the metadata is required to be half the size of the packages. Use `0' to turn off this
check, and always download metadata.

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 base‐
name 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.

ssl_check_cert_permissions Boolean - Whether yum should check the permissions on the paths for the certificates on the repository
(both remote and local). If we can't read any of the files then yum will force skip_if_unavailable to be true. This is most useful
for non-root processes which use yum on repos. that have client cert files which are readable only by root. Defaults to True.

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 his‐
tory 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 pack‐
ages 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 "com‐
mands" 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. Set this to `libproxy' to enable proxy auto configuration via libproxy. Defaults
to direct connection.

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. Also note that "never" does not override "yum clean expire-cache"

metadata_expire_filter Filter the metadata_expire time, allowing a trade of speed for accuracy if a command doesn't require it. Each
yum command can specify that it requires a certain level of timeliness quality from the remote repos. from "I'm about to
install/upgrade, so this better be current" to "Anything that's available is good enough".

`never' - Nothing is filtered, always obey metadata_expire.

`read-only:past' - Commands that only care about past information are filtered from metadata expiring. Eg. yum history info (if his‐
tory needs to lookup anything about a previous transaction, then by definition the remote package was available in the past).

`read-only:present' - Commands that are balanced between past and future. This is the default. Eg. yum list yum

`read-only:future' - Commands that are likely to result in running other commands which will require the latest metadata. Eg. yum
check-update

Note that this option requires that all the enabled repositories be roughly the same freshness (meaning the cache age difference from
one another is at most 5 days). Failing that, metadata_expire will always be obeyed, just like with `never'.

Also note that this option does not override "yum clean expire-cache".

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.

`group:small' - With the primary also download the updateinfo metadata, groups, and pkgtags. This is required for yum-security opera‐
tions and it also used in the graphical clients. This file also tends to be significantly smaller than most others. This is the
default.

`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 graphi‐
cal 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 con‐
tains the changelog information which is used by yum-changelog. This is what "yum makecache" uses.

mddownloadpolicy You can select which kinds of repodata you would prefer yum to download:

`sqlite' - Download the .sqlite files, if available. This is currently slightly faster, once they are downloaded. However these files
tend to be bigger, and thus. take longer to download.

`xml' - Download the .XML files, which yum will do anyway as a fallback on the other options. These files tend to be smaller, but
they require parsing/converting locally after download and some aditional checks are performed on them each time they are used.

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 plat‐
form, 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 avail‐
able 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 avail‐
able 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_running_kernel The colorization/highlighting for kernel packages in list/info installed which is the same ver‐
sion as the running kernel. Default is `bold,underline. 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 val‐
ues.

color_list_available_running_kernel The colorization/highlighting for kernel packages in list/info available which is the same ver‐
sion as the running kernel. Default is `bold,underline. 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.

ui_repoid_vars When a repository id is displayed, append these yum variables to the string if they are used in the baseurl/etc. Vari‐
ables are appended in the order listed (and found). Default is 'releasever basearch'.

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

upgrade_requirements_on_install When installing/reinstalling/upgrading packages go through each package's installed dependencies and
check for an update. Boolean (1, 0, True, False, yes,no) Defaults to False

recheck_installed_requires When upgrading a package do we recheck any requirements that existed in the old package. Turning this on
shouldn't do anything but slow yum depsolving down, however using rpm --nodeps etc. can break the rpmdb and then this will help.
Boolean (1, 0, True, False, yes,no) Defaults to False

reset_nice If set to true then yum will try to reset the nice value to zero, before running an rpm transaction. Defaults to True.

exit_on_lock Should the yum client exit immediately when something else has the lock. Boolean (1, 0, True, False, yes, no) Defaults
to False

loadts_ignoremissing Should the load-ts command ignore packages that are missing. This includes packages in the TS to be removed,
which aren't installed, and packages in the TS to be added, which aren't available. If this is set to true, and an rpm is missing
then loadts_ignorenewrpm is automatically set to true. Boolean (1, 0, True, False, yes, no) Defaults to False

loadts_ignorerpm Should the load-ts command ignore the rpmdb version (yum version nogroups) or abort if there is a mismatch between
the TS file and the current machine. If this is set to true, then loadts_ignorenewrpm is automatically set to true. Boolean (1, 0,
True, False, yes, no) Defaults to False

loadts_ignorenewrpm Should the load-ts command ignore the future rpmdb version or abort if there is a mismatch between the TS file
and what will happen on the current machine. Note that if loadts_ignorerpm is True, this option does nothing. Boolean (1, 0, True,
False, yes, no) Defaults to False

autosavets Should yum automatically save a transaction to a file when the transaction is solved but not run. Boolean (1, 0, True,
False, yes, no) Defaults to True

fssnap_automatic_pre Should yum try to automatically create a snapshot before it runs a transaction. Boolean (1, 0, True, False,
yes, no) Defaults to False

fssnap_automatic_post Should yum try to automatically create a snapshot after it runs a transaction. Boolean (1, 0, True, False,
yes, no) Defaults to False

fssnap_automatic_keep How many old snapshots should yum keep when trying to automatically create a new snapshot. Setting to 0 dis‐
ables this feature. Default is '1'.

fssnap_percentage The size of new snaphosts, expressed as a percentage of the old origin device. Any number between 1 and 100.
Default is '100'.

fssnap_devices The origin LVM devices to use for snapshots. Wildcards and negation are allowed, first match (positive or negative)
wins. Default is: !*/swap !*/lv_swap glob:/etc/yum/fssnap.d/*.conf

fssnap_abort_on_errors When fssnap_automatic_pre or fssnap_automatic_post is enabled, it's possible to specify which fssnap errors
should make the transaction fail. The default is `any'.

`broken-setup' - Abort current transaction if snapshot support is unavailable because lvm is missing or broken.

`snapshot-failure' - Abort current transaction if creating a snapshot fails (e.g. there is not enough free space to make a snapshot).

`any' - Abort current transaction if any of the above occurs.

`none' - Never abort a transaction in case of errors.

depsolve_loop_limit Set the number of times any attempt to depsolve before we just give up. This shouldn't be needed as yum should
always solve or fail, however it has been observed that it can loop forever with very large system upgrades. Setting this to `0' (or
"<forever>") makes yum try forever. Default is `100'.

usr_w_check Either `0' or `1'. Set this to `0' to disable the checking for writability on /usr in the installroot (when going into
the depsolving stage). Default is `1' (perform the check).

skip_missing_names_on_install If set to False, 'yum install' will fail if it can't find any of the provided names (package, group,
rpm file). Boolean (1, 0, True, False, yes, no). Defaults to True.

skip_missing_names_on_update If set to False, 'yum update' will fail if it can't find any of the provided names (package, group, rpm
file). It will also fail if the provided name is a package which is available, but not installed. Boolean (1, 0, True, False, yes,
no). Defaults to True.

[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 convert‐
ing 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. Substitu‐
tion 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.

keepcache Overrides the keepcache option from the [main] section for 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 automati‐
cally imported without user confirmation.

exclude Same as the [main] exclude option but only for this repository. Substitution variables, described below, are honored here.

Can be disabled using --disableexcludes.

includepkgs Inverse of exclude, yum will exclude any package in the repo. that doesn't match this list. This works in conjunction
with exclude and doesn't override it, so if you exclude=*.i386 and includepkgs=python* then only packages starting with python that
do not have an i386 arch. will be seen by yum in this repo.

Substitution variables, described below, are honored here.

Can be disabled using --disableexcludes.

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 fail‐
ure 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.

ip_resolve Overrides the ip_resolve option from the [main] section for this repository.

ftp_disable_epsv Overrides the ftp_disable_epsv option from the [main] section for this repository.

deltarpm_percentage Overrides the deltarpm_percentage option from the [main] section for this repository.

deltarpm_metadata_percentage Overrides the deltarpm_metadata_percentage 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.

ssl_check_cert_permissions Overrides the ssl_check_cert_permissions option from the [main] section for this repository.

metadata_expire Overrides the metadata_expire option from the [main] section for this repository.

metadata_expire_filter Overrides the metadata_expire_filter 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 set‐
ting

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.

async If set to True Yum will download packages and metadata from this repo in parallel, if possible. Defaults to True.

ui_repoid_vars Overrides the ui_repoid_vars option from the [main] section for this repository.

compare_providers_priority During depsolving, when choosing the best provider among several, yum will respect the priority of each
provider's repository (note that there are other factors which yum considers, which may overweigh the repository priority). The value
is an integer from 1 to 99, 1 being the most preferred repository, and 99 being the least preferred one. By default all repositories
have the priority of 80.

URL INCLUDE SYNTAX

The inclusion of external configuration files is supported for /etc/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 the architecture or your system as detected by yum.

$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 vari‐
able 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.conf
/etc/yum.repos.d/
/etc/yum/pluginconf.d/
/etc/yum/protected.d
/etc/yum/vars