====== Linux:yum:yumについて ======
===== 環境 =====
  * OS:CentOS 6.6
  * yum 3.2.29
===== yumとは =====

  * RedHat系ディストリビューションで採用されているパッケージ管理システム

===== 設定ファイル =====
  - yum全体に関連する設定は、 /etc/yum.conf に記述
  - 個々のリポジトリの設定は、/etc/yum.repos.d/∗.rep に記述

===== yum.conf ファイル =====

==== 例 ===
<code>
[main] 
cachedir=/var/cache/yum/$basearch/$releasever
keepcache=0
debuglevel=2
logfile=/var/log/yum.log
exactarch=1
obsoletes=1
gpgcheck=1
plugins=1
installonly_limit=5
bugtracker_url=http://bugs.centos.org/set_project.php?project_id=19&ref=http://bugs.centos.org/bug_report_page.php?category=yum
distroverpkg=centos-release

#  This is the default, if you make this bigger yum won't see if the metadata
# is newer on the remote and so you'll "gain" the bandwidth of not having to
# download the new metadata and "pay" for it by yum not having correct
# information.
#  It is esp. important, to have correct metadata, for distributions like
# Fedora which don't keep old packages around. If you don't like this checking
# interupting your command line usage, it's much better to have something
# manually check the metadata once an hour (yum-updatesd will do this).
# metadata_expire=90m

# PUT YOUR REPOS HERE OR IN separate files named file.repo
# in /etc/yum.repos.d
</code>

==== [main] セクションに指定できるディレクティブ ====

^ ディレクティブ ^ 説明 ^
|cachedir|ダウンロードしたパッケージを格納するためのディレクトリを指定する。|
|persistdir| |
|keepcache|0:インストール成功後ヘッダーとパッケージのキャッシュを保持しない(デフォルト)|
|:::      |1:インストール成功後キャッシュを保持する|
|reposdir| |
|options| |
|debuglevel| |
|errorlevel| |
|rpmverbosity| |
|protected_packages| |
|protected_multilib| |
|logfile| |
|gpgcheck| |
|localpkg_gpgcheck| |
|repo_gpgcheck| |
|skip_broken| |
|assumeyes|0:yumは実行する重要な動作の確認をプロンプトする。(デフォルト）|
|:::      |1:yumが実行する重要な動作の確認をプロンプトしない。|
|alwaysprompt| |
|tolerant| |
|exclude| |
|exactarch| |
|installonlypkgs| |
|installonly_limit| |
|kernelpkgnames| |
|showdupesfromrepos| |
|obsoletes| |
|overwrite_groups| |
|groupremove_leaf_only| |
|enable_group_conditionals| |
|group_package_types| |
|installroot| |
|distroverpkg| |
|diskspacecheck| |
|tsflags| |
|recent| |
|retries| |
|keepalive| |
|timeout| |
|http_caching| |
|throttle| |
|bandwidth| |
|sslcacert| |
|sslverify| |
|sslclientcert| |
|sslclientkey| |
|ssl_check_cert_permissions| |
|history_record| |
|history_record_packages| |
|history_list_view| |
|commands| |
|syslog_ident| |
|syslog_facility| |
|syslog_device| |
|proxy| |
|proxy_username| |
|proxy_password| |
|username| |
|password| |
|plugins| |
|pluginpath| |
|pluginconfpath| |
|metadata_expire| |
|mirrorlist_expire| |
|mdpolicy| |
|multilib_policy| |
|bugtracker_url| |
|color| |
|color_list_installed_older| |
|color_list_installed_newer| |
|color_list_installed_reinstall| |
|color_list_installed_extra| |
|color_list_available_upgrade| |
|color_list_available_downgrade| |
|color_list_available_install| |
|color_list_available_reinstall| |
|color_search_match| |
|color_update_installed| |
|color_update_local| |
|color_update_remote| |
|clean_requirements_on_remove| |
|reset_nice| |
|depsolve_loop_limit| |

===== /etc/yum.repos/∗.rep ファイル =====

==== CentOS-Base.repの例 ===
<code>
# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client.  You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#

[base]
name=CentOS-$releasever - Base
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo
=os&infra=$infra
#baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6

#released updates
[updates]
name=CentOS-$releasever - Updates
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo
=updates&infra=$infra
#baseurl=http://mirror.centos.org/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
[extras]
name=CentOS-$releasever - Extras
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo
=extras&infra=$infra
#baseurl=http://mirror.centos.org/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6

#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo
=centosplus&infra=$infra
#baseurl=http://mirror.centos.org/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6

#contrib - packages by Centos Users
[contrib]
name=CentOS-$releasever - Contrib
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo
=contrib&infra=$infra
#baseurl=http://mirror.centos.org/centos/$releasever/contrib/$basearch/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
#additional packages that may be useful
</code>

==== [repository] セクションに指定できるディレクティブ ====
  * //**repository**// は一意なリポジトリIDを指定し、個々のyumリポジトリを定義する。

^ ディレクティブ ^ 説明 ^
|name|リポジトリの説明。省略不可|
|baseurl| |
|mirrorlist| |
|enabled| |
|gpgkey| |