CentOS 7.9 快速更换 阿里云源教程

CentOS 7.9 更换源教程

总结

1. # 下载 wget
2. yum -y install wget
3. # 备份 yum 源
4. mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak
5. # 下载阿里云的yum源到 /etc/yum.repos.d/
6. # 此处以 CentOS 7 为例，如果是其它版本或者系统的话，请看：http://mirrors.aliyun.com/repo/
7. wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
8. # 清除缓存
9. yum clean all
10. # 更新本地 yum 缓存
11. yum makecache
12. # 更新 yum 中的所有软件包
13. yum -y update

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以下是步骤！！

查看版本

1. cat /etc/redhat-release

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https://blog.csdn.net/XiaoXinYAYAYA/article/details/139620079

CentOS 7是一个使用比较广泛，也比较流行的Linux发行版，但是默认的yum源常常无法满足我们的需求。以下是以阿里源为例的详细换源教程。

1、备份原有源文件

备份原有的源文件，以备不时之需。命令如下：

1. sudo cp /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

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2、安装依赖工具

1. sudo yum install -y wget

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3、更换源

下载新的源文件，指令如下：

1. sudo wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo

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出现问题 需要增加dns解析！

输入

1. vim /etc/resolv.conf

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添加DNS地址：

1. nameserver 8.8.8.8
2. nameserver 8.8.4.4
3. nameserver 223.5.5.5
4. nameserver 223.6.6.6

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当然不想下载，也可以采取如下方法：

1. sudo vi /etc/yum.repos.d/CentOS-Base.repo

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然后直接复制下内容：

1. # CentOS-Base.repo
2. #
3. # The mirror system uses the connecting IP address of the client and the
4. # update status of each mirror to pick mirrors that are updated to and
5. # geographically close to the client. You should use this for CentOS updates
6. # unless you are manually picking other mirrors.
7. #
8. # If the mirrorlist= does not work for you, as a fall back you can try the
9. # remarked out baseurl= line instead.
10. #
11. #
13. [base]
14. name=CentOS-$releasever - Base - mirrors.aliyun.com
15. failovermethod=priority
16. baseurl=http://mirrors.aliyun.com/centos/$releasever/os/$basearch/
17. http://mirrors.aliyuncs.com/centos/$releasever/os/$basearch/
18. http://mirrors.cloud.aliyuncs.com/centos/$releasever/os/$basearch/
19. gpgcheck=1
20. gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
22. #released updates
23. [updates]
24. name=CentOS-$releasever - Updates - mirrors.aliyun.com
25. failovermethod=priority
26. baseurl=http://mirrors.aliyun.com/centos/$releasever/updates/$basearch/
27. http://mirrors.aliyuncs.com/centos/$releasever/updates/$basearch/
28. http://mirrors.cloud.aliyuncs.com/centos/$releasever/updates/$basearch/
29. gpgcheck=1
30. gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
32. #additional packages that may be useful
33. [extras]
34. name=CentOS-$releasever - Extras - mirrors.aliyun.com
35. failovermethod=priority
36. baseurl=http://mirrors.aliyun.com/centos/$releasever/extras/$basearch/
37. http://mirrors.aliyuncs.com/centos/$releasever/extras/$basearch/
38. http://mirrors.cloud.aliyuncs.com/centos/$releasever/extras/$basearch/
39. gpgcheck=1
40. gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
42. #additional packages that extend functionality of existing packages
43. [centosplus]
44. name=CentOS-$releasever - Plus - mirrors.aliyun.com
45. failovermethod=priority
46. baseurl=http://mirrors.aliyun.com/centos/$releasever/centosplus/$basearch/
47. http://mirrors.aliyuncs.com/centos/$releasever/centosplus/$basearch/
48. http://mirrors.cloud.aliyuncs.com/centos/$releasever/centosplus/$basearch/
49. gpgcheck=1
50. enabled=0
51. gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
53. #contrib - packages by Centos Users
54. [contrib]
55. name=CentOS-$releasever - Contrib - mirrors.aliyun.com
56. failovermethod=priority
57. baseurl=http://mirrors.aliyun.com/centos/$releasever/contrib/$basearch/
58. http://mirrors.aliyuncs.com/centos/$releasever/contrib/$basearch/
59. http://mirrors.cloud.aliyuncs.com/centos/$releasever/contrib/$basearch/
60. gpgcheck=1
61. enabled=0
62. gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7

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保存退出，操作如下：

1. 1、按Esc
2. 2、输入:wq!
3. 3、按Enter

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4、生成缓存

配置新的源后，需要清理yum的旧缓存并生成新缓存，指令如下：

1. sudo yum clean all
2. sudo yum makecache

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5、检查新源

输入以下指令：

1. yum repolist

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如图：

如果输出中包含了阿里源，则证明已换源成功。

6、测试新源

我们随便搜索一个软件包，比如nginx：

1. yum search nginx

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7、其他源

如果想使用其他的源，替换对应的链接或内容即可。

网易源：

http://mirrors.163.com/.help/CentOS7-Base-163.repo

对应内容：

1. # CentOS-Base.repo
2. #
3. # The mirror system uses the connecting IP address of the client and the
4. # update status of each mirror to pick mirrors that are updated to and
5. # geographically close to the client. You should use this for CentOS updates
6. # unless you are manually picking other mirrors.
7. #
8. # If the mirrorlist= does not work for you, as a fall back you can try the
9. # remarked out baseurl= line instead.
10. #
11. #
12. [base]
13. name=CentOS-$releasever - Base - 163.com
14. #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
15. baseurl=http://mirrors.163.com/centos/$releasever/os/$basearch/
16. gpgcheck=1
17. gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7
19. #released updates
20. [updates]
21. name=CentOS-$releasever - Updates - 163.com
22. #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
23. baseurl=http://mirrors.163.com/centos/$releasever/updates/$basearch/
24. gpgcheck=1
25. gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7
27. #additional packages that may be useful
28. [extras]
29. name=CentOS-$releasever - Extras - 163.com
30. #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
31. baseurl=http://mirrors.163.com/centos/$releasever/extras/$basearch/
32. gpgcheck=1
33. gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7
35. #additional packages that extend functionality of existing packages
36. [centosplus]
37. name=CentOS-$releasever - Plus - 163.com
38. baseurl=http://mirrors.163.com/centos/$releasever/centosplus/$basearch/
39. gpgcheck=1
40. enabled=0
41. gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7

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若还需其他源，请自行搜集。