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RHEL 5.8 や RHEL6 は，サブスクリプションの管理が一新されて とても分かりにくくなった．
利用可能なチャンネルを確認する
# yum repolist all Loaded plugins: katello, product-id, rhnplugin, security, subscription-manager Updating certificate-based repositories. This system is not registered with RHN. RHN Satellite or RHN Classic support will be disabled. rhel-5-server-cf-tools-1-rpms | 2.8 kB 00:00 rhel-5-server-rhev-agent-rpms | 2.8 kB 00:00 rhel-5-server-rpms | 3.7 kB 00:00 repo id repo name status rhel-5-server-beta-debug-rpms Red Hat Enterprise disabled rhel-5-server-beta-rpms Red Hat Enterprise disabled rhel-5-server-beta-source-rpms Red Hat Enterprise disabled rhel-5-server-cf-tools-1-beta-rpms Red Hat CloudForms disabled rhel-5-server-cf-tools-1-beta-source-rpms Red Hat CloudForms disabled rhel-5-server-cf-tools-1-rpms Red Hat CloudForms enabled: 30 rhel-5-server-cf-tools-1-source-rpms Red Hat CloudForms disabled rhel-5-server-debug-rpms Red Hat Enterprise disabled rhel-5-server-productivity-debug-rpms Red Hat Enterprise disabled rhel-5-server-productivity-rpms Red Hat Enterprise disabled rhel-5-server-productivity-source-rpms Red Hat Enterprise disabled rhel-5-server-rhev-agent-beta-debug-rpms Red Hat Enterprise disabled rhel-5-server-rhev-agent-beta-rpms Red Hat Enterprise disabled rhel-5-server-rhev-agent-beta-source-rpms Red Hat Enterprise disabled rhel-5-server-rhev-agent-debug-rpms Red Hat Enterprise disabled rhel-5-server-rhev-agent-rpms Red Hat Enterprise enabled: 2 rhel-5-server-rhev-agent-source-rpms Red Hat Enterprise disabled rhel-5-server-rpms Red Hat Enterprise enabled: 13,923 rhel-5-server-source-rpms Red Hat Enterprise disabled rhel-5-server-supplementary-beta-debuginfo Red Hat Enterprise disabled rhel-5-server-supplementary-beta-rpms Red Hat Enterprise disabled rhel-5-server-supplementary-beta-source-rpms Red Hat Enterprise disabled rhel-5-server-supplementary-debuginfo Red Hat Enterprise disabled rhel-5-server-supplementary-rpms Red Hat Enterprise disabled rhel-5-server-supplementary-source-rpms Red Hat Enterprise disabled rhel-5-server-vt-beta-debug-rpms Red Hat Enterprise disabled rhel-5-server-vt-beta-rpms Red Hat Enterprise disabled rhel-5-server-vt-beta-source-rpms Red Hat Enterprise disabled rhel-5-server-vt-debug-rpms Red Hat Enterprise disabled rhel-5-server-vt-rpms Red Hat Enterprise disabled rhel-5-server-vt-source-rpms Red Hat Enterprise disabled rhel-debuginfo Red Hat Enterprise disabled rhel-server-dts-5-rhb-debug-rpms Red Hat Developer T disabled rhel-server-dts-5-rhb-rpms Red Hat Developer T disabled rhel-server-dts-5-rhb-source-rpms Red Hat Developer T disabled repolist: 13,955
# yum-config-manager --enable rhel-6-server-productivity-rpms
コマンドでどうやるかは不明．
ソフトウェアアップデート時に，
No more mirros
エラーが出る場合は，このリストを確認し，必要のないチャンネルをはずしておく．
GUI で [アプリケーション]->[ソフトウェアの追加/削除]
ソフトウェア追加/削除ウインドウで [編集]->[リポジトリ]
