更改yum 源

lwohvyeLinux
  1. 例如执行yum update，经常报错“Cound not resolve host: xxxxx”，一般都是yum源是使用的国外镜像，国内访问很不好。这时可以将源手动替换为国内的清华大学源，或者阿里云源之类的。

详细使用方法可以参考https://mirrors.tuna.tsinghua.edu.cn/help/centos/，镜像站使用帮助，选择自己的版本即可。

CentOS 7

下面贴出CentOS 7版本下，清华源的配置

 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 
13 [base]
14 name=CentOS-$releasever - Base
15 baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/os/$basearch/
16 #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
17 gpgcheck=1
18 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
19 
20 #released updates
21 [updates]
22 name=CentOS-$releasever - Updates
23 baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/updates/$basearch/
24 #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
25 gpgcheck=1
26 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
27 
28 #additional packages that may be useful
29 [extras]
30 name=CentOS-$releasever - Extras
31 baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/extras/$basearch/
32 #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
33 gpgcheck=1
34 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
35 
36 #additional packages that extend functionality of existing packages
37 [centosplus]
38 name=CentOS-$releasever - Plus
39 baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/centosplus/$basearch/
40 #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus
41 gpgcheck=1
42 enabled=0
43 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

PS 如果觉得命令行使用不方便，可以直接用SFTP连上之后进行文件编辑。

  1. 另外内核升级时可能用到/etc/yum.repos.d/elrepo.repo文件，也同样可以将其修改为清华大学的源。

同样贴出清华大学elrepo.repo源配置

### Name: 清华大学开源镜像
### URL: https://mirrors.tuna.tsinghua.edu.cn/elrepo/
​
[elrepo]
name=ELRepo.org Community Enterprise Linux Repository - el7
baseurl=https://mirrors.tuna.tsinghua.edu.cn/elrepo/elrepo/el7/$basearch/
#mirrorlist=http://mirrors.elrepo.org/mirrors-elrepo.el7
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-elrepo.org
protect=0
​
[elrepo-testing]
name=ELRepo.org Community Enterprise Linux Testing Repository - el7
baseurl=https://mirrors.tuna.tsinghua.edu.cn/elrepo/testing/el7/$basearch/
#mirrorlist=http://mirrors.elrepo.org/mirrors-elrepo-testing.el7
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-elrepo.org
protect=0
​
[elrepo-kernel]
name=ELRepo.org Community Enterprise Linux Kernel Repository - el7
baseurl=https://mirrors.tuna.tsinghua.edu.cn/elrepo/kernel/el7/$basearch/
#mirrorlist=http://mirrors.elrepo.org/mirrors-elrepo-kernel.el7
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-elrepo.org
protect=0
​
[elrepo-extras]
name=ELRepo.org Community Enterprise Linux Extras Repository - el7
baseurl=https://mirrors.tuna.tsinghua.edu.cn/elrepo/extras/el7/$basearch/
#mirrorlist=http://mirrors.elrepo.org/mirrors-elrepo-extras.el7
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-elrepo.org
protect=0

CentOS 8

Base

# 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.
#
#



[BaseOS]
name=CentOS-$releasever - Base
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/BaseOS/$basearch/os/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=BaseOS&infra=$infra
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

[AppStream]
name=CentOS-$releasever - AppStream
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/AppStream/$basearch/os/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=AppStream&infra=$infra
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

[PowerTools]
name=CentOS-$releasever - PowerTools
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/PowerTools/$basearch/os/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=PowerTools&infra=$infra
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial


#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/extras/$basearch/os/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial



#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/centosplus/$basearch/os/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

Stream

# CentOS-Stream-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.
#
#



[Stream-BaseOS]
name=CentOS-Stream - Base
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$stream/BaseOS/$basearch/os/
#mirrorlist=http://mirrorlist.centos.org/?release=$stream&arch=$basearch&repo=BaseOS&infra=$infra
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

[Stream-AppStream]
name=CentOS-Stream - AppStream
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$stream/AppStream/$basearch/os/
#mirrorlist=http://mirrorlist.centos.org/?release=$stream&arch=$basearch&repo=AppStream&infra=$infra
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

[Stream-PowerTools]
name=CentOS-Stream - PowerTools
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$stream/PowerTools/$basearch/os/
#mirrorlist=http://mirrorlist.centos.org/?release=$stream&arch=$basearch&repo=PowerTools&infra=$infra
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial


#additional packages that may be useful
[Stream-extras]
name=CentOS-Stream - Extras
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$stream/extras/$basearch/os/
#mirrorlist=http://mirrorlist.centos.org/?release=$stream&arch=$basearch&repo=extras
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial



#additional packages that extend functionality of existing packages
[Stream-centosplus]
name=CentOS-Stream - Plus
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$stream/centosplus/$basearch/os/
#mirrorlist=http://mirrorlist.centos.org/?release=$stream&arch=$basearch&repo=centosplus
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

elrepo

### Name: ELRepo.org Community Enterprise Linux Repository for el8
### URL: https://elrepo.org/
### URL: https://mirrors.tuna.tsinghua.edu.cn/elrepo/

[elrepo]
name=ELRepo.org Community Enterprise Linux Repository - el8
baseurl=http://elrepo.org/linux/elrepo/el8/$basearch/
        https://mirrors.tuna.tsinghua.edu.cn/elrepo/elrepo/el8/$basearch/
        http://mirrors.coreix.net/elrepo/elrepo/el8/$basearch/
        http://mirror.rackspace.com/elrepo/elrepo/el8/$basearch/
        http://linux-mirrors.fnal.gov/linux/elrepo/elrepo/el8/$basearch/
mirrorlist=http://mirrors.elrepo.org/mirrors-elrepo.el8
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-elrepo.org

[elrepo-testing]
name=ELRepo.org Community Enterprise Linux Testing Repository - el8
baseurl=http://elrepo.org/linux/testing/el8/$basearch/
        https://mirrors.tuna.tsinghua.edu.cn/elrepo/testing/el8/$basearch/
        http://mirrors.coreix.net/elrepo/testing/el8/$basearch/
        http://mirror.rackspace.com/elrepo/testing/el8/$basearch/
        http://linux-mirrors.fnal.gov/linux/elrepo/testing/el8/$basearch/
mirrorlist=http://mirrors.elrepo.org/mirrors-elrepo-testing.el8
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-elrepo.org

[elrepo-kernel]
name=ELRepo.org Community Enterprise Linux Kernel Repository - el8
baseurl=http://elrepo.org/linux/kernel/el8/$basearch/
        https://mirrors.tuna.tsinghua.edu.cn/elrepo/kernel/el8/$basearch/
        http://mirrors.coreix.net/elrepo/kernel/el8/$basearch/
        http://mirror.rackspace.com/elrepo/kernel/el8/$basearch/
        http://linux-mirrors.fnal.gov/linux/elrepo/kernel/el8/$basearch/
mirrorlist=http://mirrors.elrepo.org/mirrors-elrepo-kernel.el8
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-elrepo.org

[elrepo-extras]
name=ELRepo.org Community Enterprise Linux Extras Repository - el8
baseurl=http://elrepo.org/linux/extras/el8/$basearch/
        https://mirrors.tuna.tsinghua.edu.cn/elrepo/extras/el8/$basearch/
        http://mirrors.coreix.net/elrepo/extras/el8/$basearch/
        http://mirror.rackspace.com/elrepo/extras/el8/$basearch/
        http://linux-mirrors.fnal.gov/linux/elrepo/extras/el8/$basearch/
mirrorlist=http://mirrors.elrepo.org/mirrors-elrepo-extras.el8
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-elrepo.org

内核更改。注意调整

Converting from CentOS Linux to CentOS Stream
root@centos-linux# dnf install centos-release-stream

root@centos-linux# dnf distro-sync

root@centos-stream# cat /etc/centos-release
CentOS Stream release 8

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