使用 yum-config-manager 可以帮助你更灵活地管理 YUM 仓库，特别是在处理多个仓库和需要频繁启用或禁用仓库的场景中。
yum install yum-utils查看仓库
[root@localhost ~]# yum repolist
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
repo id repo name status
base base 10,072
epel/x86_64 Extra Packages for Enterprise Linux 7 - x86_64 13,791
extras extras 526
nginx-stable/7/x86_64 nginx stable repo 364
updates updates 6,173
repolist: 30,926导入仓库的gpgkey
rpm --import http://my.custom.repo/centos/RPM-GPG-KEY-my-repo查看一个软件的所有可用的版本
[root@localhost ~]# yum list nginx --showduplicates禁用某个repo仓库
yum-config-manager --disable my-repo启用某个repo仓库
yum-config-manager --able my-repo安装指定老版本的nginx
[root@localhost ~]# yum list nginx --showduplicates
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Available Packages
nginx.x86_64 1:1.8.0-1.el7.ngx nginx-stable
nginx.x86_64 1:1.8.1-1.el7.ngx nginx-stable
nginx.x86_64 1:1.10.0-1.el7.ngx nginx-stable
nginx.x86_64 1:1.10.1-1.el7.ngx nginx-stable
nginx.x86_64 1:1.10.2-1.el7.ngx nginx-stable
nginx.x86_64 1:1.10.3-1.el7.ngx nginx-stable
nginx.x86_64 1:1.12.0-1.el7.ngx nginx-stable
nginx.x86_64 1:1.12.1-1.el7.ngx nginx-stable
nginx.x86_64 1:1.12.2-1.el7_4.ngx nginx-stable
nginx.x86_64 1:1.14.0-1.el7_4.ngx nginx-stable
nginx.x86_64 1:1.14.1-1.el7_4.ngx nginx-stable
nginx.x86_64 1:1.14.2-1.el7_4.ngx nginx-stable
nginx.x86_64 1:1.16.0-1.el7.ngx nginx-stable
nginx.x86_64 1:1.16.1-1.el7.ngx nginx-stable
nginx.x86_64 1:1.18.0-1.el7.ngx nginx-stable
nginx.x86_64 1:1.18.0-2.el7.ngx nginx-stable
nginx.x86_64 1:1.20.0-1.el7.ngx nginx-stable
nginx.x86_64 1:1.20.1-1.el7.ngx nginx-stable
nginx.x86_64 1:1.20.1-10.el7 epel
nginx.x86_64 1:1.20.2-1.el7.ngx nginx-stable
nginx.x86_64 1:1.22.0-1.el7.ngx nginx-stable
nginx.x86_64 1:1.22.1-1.el7.ngx nginx-stable
nginx.x86_64 1:1.24.0-1.el7.ngx nginx-stable
nginx.x86_64 1:1.26.0-1.el7.ngx nginx-stable
nginx.x86_64 1:1.26.1-1.el7.ngx nginx-stable
nginx.x86_64 1:1.26.1-2.el7.ngx nginx-stable
[root@localhost ~]# yum install nginx-1.20.1-10.el7
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Resolving Dependencies
--> Running transaction check
---> Package nginx.x86_64 1:1.20.1-10.el7 will be installed
--> Processing Dependency: nginx-filesystem = 1:1.20.1-10.el7 for package: 1:nginx-1.20.1-10.el7.x86_64
--> Processing Dependency: libcrypto.so.1.1(OPENSSL_1_1_0)(64bit) for package: 1:nginx-1.20.1-10.el7.x86_64
--> Processing Dependency: libssl.so.1.1(OPENSSL_1_1_0)(64bit) for package: 1:nginx-1.20.1-10.el7.x86_64
--> Processing Dependency: libssl.so.1.1(OPENSSL_1_1_1)(64bit) for package: 1:nginx-1.20.1-10.el7.x86_64
--> Processing Dependency: nginx-filesystem for package: 1:nginx-1.20.1-10.el7.x86_64
--> Processing Dependency: redhat-indexhtml for package: 1:nginx-1.20.1-10.el7.x86_64
--> Processing Dependency: libcrypto.so.1.1()(64bit) for package: 1:nginx-1.20.1-10.el7.x86_64
--> Processing Dependency: libprofiler.so.0()(64bit) for package: 1:nginx-1.20.1-10.el7.x86_64
--> Processing Dependency: libssl.so.1.1()(64bit) for package: 1:nginx-1.20.1-10.el7.x86_64
--> Running transaction check
---> Package centos-indexhtml.noarch 0:7-9.el7.centos will be installed
---> Package gperftools-libs.x86_64 0:2.6.1-1.el7 will be installed
---> Package nginx-filesystem.noarch 1:1.20.1-10.el7 will be installed
---> Package openssl11-libs.x86_64 1:1.1.1k-7.el7 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
=======================================================================================================
Package Arch Version Repository Size
=======================================================================================================
Installing:
nginx x86_64 1:1.20.1-10.el7 epel 588 k
Installing for dependencies:
centos-indexhtml noarch 7-9.el7.centos base 92 k
gperftools-libs x86_64 2.6.1-1.el7 base 272 k
nginx-filesystem noarch 1:1.20.1-10.el7 epel 24 k
openssl11-libs x86_64 1:1.1.1k-7.el7 epel 1.5 M
Transaction Summary
=======================================================================================================
Install 1 Package (+4 Dependent packages)
Total download size: 2.4 M
Installed size: 6.7 M
Is this ok [y/d/N]:
