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1-4-3 將CentOS6的更新指定為國內大學ftp站

安裝好CentOS的更新是會連至國外主機，這樣在更新上時間會很長，而國內的一些大學都有將CnetOS做Mirror，所以就將yum的主機設為更改一下，改成國內主機，這樣在安裝或更新套件就會快很多 

#cd /etc/yum.repos.d/
#cp CentOS-Base.repo CentOS-Base.repo.bak ==>先把設定檔備份一下
#vi CentOS-Base.repo ==>進行編輯

將 mirror.centos.org/centos 換成 ftp.isu.edu.tw/pub/Linux/CentOS/

你可以將以下內容取代原CentOS-Base.repo

# 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-$releasever - Base
baseurl=http://ftp.isu.edu.tw/pub/Linux/CentOS/$releasever/os/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6

[updates]
name=CentOS-$releasever - Updates
baseurl=http://ftp.isu.edu.tw/pub/Linux/CentOS/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6

[extras]
name=CentOS-$releasever - Extras
baseurl=http://ftp.isu.edu.tw/pub/Linux/CentOS/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6

[centosplus]
name=CentOS-$releasever - Plus
baseurl=http://ftp.isu.edu.tw/pub/Linux/CentOS/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6

[contrib]
name=CentOS-$releasever - Contrib
baseurl=http://ftp.isu.edu.tw/pub/Linux/CentOS/$releasever/contrib/$basearch/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6