Let's take a drive.

デフォルトの状態だとyum-updatesdっていうデーモンが動作していて、たまたまupdatesdが動作していたりするとyumが利用できなかったり、大量にメモリを消費したりとあまり良くないので停止し、cronで夜間に更新するように設定変更する。

yum-updatesdを停止する

# /etc/rc.d/init.d/yum-updatesd stop
yum-updates を停止中:                                      [  OK  ]

yum-updatesdを削除する。

# yum -y remove yum-updatesd
Loading "installonlyn" plugin
Setting up Remove Process
Resolving Dependencies
--> Populating transaction set with selected packages. Please wait.
---> Package yum-updatesd.noarch 0:3.0.5-1.el5.centos.5 set to be erased
--> Running transaction check

Dependencies Resolved

=============================================================================
Package                 Arch       Version          Repository        Size
=============================================================================
Removing:
yum-updatesd            noarch     3.0.5-1.el5.centos.5  installed         4.0 k

Transaction Summary
=============================================================================
Install      0 Package(s)
Update       0 Package(s)
Remove       1 Package(s)

Downloading Packages:
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
Removing  : yum-updatesd                 ######################### [1/1]

Removed: yum-updatesd.noarch 0:3.0.5-1.el5.centos.5
Complete!

fastestmirrorプラグインをインストールする。

# yum -y install yum-fastestmirror
Loading "installonlyn" plugin
Setting up Install Process
Setting up repositories
base                      100% |=========================| 1.1 kB    00:00
updates                   100% |=========================|  951 B    00:00
addons                    100% |=========================|  951 B    00:00
extras                                                          1.1 kB 00:02
Reading repository metadata in from local files
Parsing package install arguments
Resolving Dependencies
--> Populating transaction set with selected packages. Please wait.
---> Downloading header for yum-fastestmirror to pack into transaction set.
yum-fastestmirror-1.0.4-3 100% |=========================| 6.1 kB    00:00
---> Package yum-fastestmirror.noarch 0:1.0.4-3.el5.centos.2 set to be updated
--> Running transaction check

Dependencies Resolved

=============================================================================
Package                 Arch       Version          Repository        Size
=============================================================================
Installing:
yum-fastestmirror       noarch     1.0.4-3.el5.centos.2  base               12 k

Transaction Summary
=============================================================================
Install      1 Package(s)
Update       0 Package(s)
Remove       0 Package(s)

Total download size: 12 k
Downloading Packages:
(1/1): yum-fastestmirror- 100% |=========================|  12 kB    00:00
Running Transaction Test
warning: yum-fastestmirror-1.0.4-3.el5.centos.2: Header V3 DSA signature: NOKEY, key ID e8562897
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
Installing: yum-fastestmirror            ######################### [1/1]

Installed: yum-fastestmirror.noarch 0:1.0.4-3.el5.centos.2
Complete!

yum-cronをインストールする。

# yum -y install yum-cron
Loading "installonlyn" plugin
Loading "fastestmirror" plugin
Setting up Install Process
Setting up repositories
Determining fastest mirrors
Reading repository metadata in from local files
Parsing package install arguments
Resolving Dependencies
--> Populating transaction set with selected packages. Please wait.
---> Downloading header for yum-cron to pack into transaction set.
yum-cron-0.6-1.el5.centos 100% |=========================| 6.0 kB    00:00
---> Package yum-cron.noarch 0:0.6-1.el5.centos set to be updated
--> Running transaction check
--> Processing Dependency: yum-downloadonly for package: yum-cron
--> Restarting Dependency Resolution with new changes.
--> Populating transaction set with selected packages. Please wait.
---> Downloading header for yum-downloadonly to pack into transaction set.
yum-downloadonly-1.0.4-3. 100% |=========================| 6.1 kB    00:00
---> Package yum-downloadonly.noarch 0:1.0.4-3.el5.centos.2 set to be updated
--> Running transaction check

Dependencies Resolved

=============================================================================
Package                 Arch       Version          Repository        Size
=============================================================================
Installing:
yum-cron                noarch     0.6-1.el5.centos  base               15 k
Installing for dependencies:
yum-downloadonly        noarch     1.0.4-3.el5.centos.2  base              8.2 k

Transaction Summary
=============================================================================
Install      2 Package(s)
Update       0 Package(s)
Remove       0 Package(s)

Total download size: 23 k
Downloading Packages:
(1/2): yum-downloadonly-1 100% |=========================| 8.2 kB    00:00
(2/2): yum-cron-0.6-1.el5 100% |=========================|  15 kB    00:00
Running Transaction Test
warning: yum-downloadonly-1.0.4-3.el5.centos.2: Header V3 DSA signature: NOKEY, key ID e8562897
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
Installing: yum-downloadonly             ######################### [1/2]
Installing: yum-cron                     ######################### [2/2]

Installed: yum-cron.noarch 0:0.6-1.el5.centos
Dependency Installed: yum-downloadonly.noarch 0:1.0.4-3.el5.centos.2
Complete!

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