本地、远程yum源搭建

1.创建挂载点并挂载CentOS5.4光盘镜像ISO

mkdir /mnt/CentOS5.4

mount -o loop CentOS-5.4-x86_-bin-DVD.iso /mnt/CentOS5.4

2.修改xxx.repo的内容

cat > /etc/yum.repos.d/CentOS-Base.repo <[base]

name=CentOS-Base

baseurl=file:///mnt/Centos5.4

gpgcheck=1

enable=0

gpgkey=file:///mnt/CentOS5.4/RPM-GPG-KEY-CentOS-5

EOF

3.导入证书文件

rpm --import /mnt/CentOS5.4/RPM-GPG-KEY-CentOS-5

4.yum list 列出所有文件列表

Centos5.4 远程搭建

若没有搭建本地yum源，直接搭建远程yum源的话，需要做上面第三部操作

rpm --import /mnt/CentOS5.4/RPM-GPG-KEY-CentOS-5

修改CentOS 5.4的yum源为上海交大FTP2010-01-14 20:461．修改/etc/yum.repos.d/CentOS-Base.repo为:

# 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

baseurl=http://ftp.sjtu.edu.cn/centos/5.4/os/$basearch/

gpgcheck=1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5

#released updates

[updates]

name=CentOS-$releasever – Updates

#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates

baseurl=http://ftp.sjtu.edu.cn/centos/5.4/updates/$basearch/

gpgcheck=1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5

#packages used/produced in the build but not released

[addons]

name=CentOS-$releasever – Addons

#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=addons

baseurl=http://ftp.sjtu.edu.cn/centos/5.4/addons/$basearch/

gpgcheck=1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5

#additional packages that may be useful

[extras]

name=CentOS-$releasever – Extras

#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras

baseurl=http://ftp.sjtu.edu.cn/centos/5.4/extras/$basearch/

gpgcheck=1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5

#additional packages that extend functionality of existing packages

[centosplus]

name=CentOS-$releasever – Plus

#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus

baseurl=http://ftp.sjtu.edu.cn/centos/5.4/centosplus/$basearch/

gpgcheck=1

enabled=0

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5

#contrib – packages by Centos Users

[contrib]

name=CentOS-$releasever – Contrib

#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=contrib

baseurl=http://ftp.sjtu.edu.cn/centos/5.4/contrib/$basearch/

gpgcheck=1

enabled=0

gpgkey=

file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5

2．执行

yum update

Ok了，搞定。

注：

centos yum 错误 Error: Cannot find a valid baseurl for repo: addons 装了个CentOS 5.x,使用yum时出现了下面的错误提示。

Loaded plugins: fastestmirror

Loading mirror speeds from cached hostfile

Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=5&arch=i386&repo=addons error was

[Errno 4] IOError:

Error: Cannot find a valid baseurl for repo: addons

可以尝试去 ping mirrorlist.centos.org 若发现ping不通。可能是dns设置问题。

ping www.ctohome.com 也出现 unknown host www.ctohome.com 的错误。

多试一试偶尔会ping通，说明dns的确有问题。于是，我们来修改dns配置：

vi /etc/resolv.conf

或者使用echo "nameserver 8.8.8.8" >> /etc/resolv.conf

搞定，ping www.baidu.com 顺畅了，yum可以用了！删除 /etc/resolv.conf 里面有问题的dns服务器。