详解CentOS7更新YUM源步骤

[base]

name=CentOS-$releasever - Base - mirrors.aliyun.com

failovermethod=priority

baseurl=http://mirrors.aliyun.com/centos/7.4.1708/os/x86_64/

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

gpgcheck=1

gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7

#released updates

[updates]

name=CentOS-$releasever - Updates - mirrors.aliyun.com

failovermethod=priority

baseurl=http://mirrors.aliyun.com/centos/7.4.1708/updates/x86_64/

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

gpgcheck=1

gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7

#additional packages that may be useful

[extras]

name=CentOS-$releasever - Extras - mirrors.aliyun.com

failovermethod=priority

baseurl=http://mirrors.aliyun.com/centos/7.4.1708/extras/x86_64/

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

gpgcheck=1

gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7

#additional packages that extend functionality of existing packages

[centosplus]

name=CentOS-$releasever - Plus - mirrors.aliyun.com

failovermethod=priority

baseurl=http://mirrors.aliyun.com/centos/7.4.1708/centosplus/x86_64/

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

gpgcheck=1

enabled=0

gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7

#contrib - packages by Centos Users

[contrib]

name=CentOS-$releasever - Contrib - mirrors.aliyun.com

failovermethod=priority

baseurl=http://mirrors.aliyun.com/centos/7.4.1708/contrib/x86_64/

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

gpgcheck=1

enabled=0

gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7

:%s/7.4.1708/7.7.1908/g

[root@liaogx ~]# yum -y update

Plugin "product-id" can't be imported

Plugin "search-disabled-repos" can't be imported

Loaded plugins: fastestmirror

Loading mirror speeds from cached hostfile

 * base: mirrors.aliyun.com

 * epel: mirrors.tuna.tsinghua.edu.cn

 * extras: mirrors.aliyun.com

 * updates: mirrors.aliyun.com

Resolving Dependencies

--> Running transaction check

---> Package ModemManager.x86_64 0:1.6.0-2.el7 will be updated

......此处略......

---> Package yum-rhn-plugin.noarch 0:2.0.1-10.el7 will be installed

--> Running transaction check

---> Package libbytesize.x86_64 0:1.2-1.el7 will be installed

---> Package python2-pytoml.noarch 0:0.1.18-1.el7 will be installed

---> Package volume_key-libs.x86_64 0:0.3.9-8.el7 will be installed

--> Processing Conflict: initscripts-9.49.41-1.el7_5.1.x86_64 conflicts redhat-release < 7.5-0.11

--> Finished Dependency Resolution

Error: initscripts conflicts with redhat-release-server-7.4-18.el7.x86_64

 You could try using --skip-broken to work around the problem

** Found 2 pre-existing rpmdb problem(s), 'yum check' output follows:

PackageKit-1.1.5-1.el7.centos.x86_64 has missing requires of PackageKit-backend

rhn-check-2.0.2-17.el7.noarch has missing requires of yum-rhn-plugin >= ('0', '1.6.4', '1')

[root@liaogx ~]#

[root@liaogx ~]# rpm -e redhat-release-server-7.4-18.el7.x86_64 --nodeps

warning: file /etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release: remove failed: No such file or directory

warning: file /etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-legacy-rhx: remove failed: No such file or directory

warning: file /etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-legacy-release: remove failed: No such file or directory

warning: file /etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-legacy-former: remove failed: No such file or directory

warning: file /etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-beta: remove failed: No such file or directory

[root@liaogx ~]#

[root@liaogx ~]# yum -y update

......此处省略10分钟......

Complete!

[root@liaogx ~]#