我不小心删除了存储在/etc /目录中的配置文件，并且昨天进行了最新备份。
如何在RHEL/CentOS Linux服务器下使用yum命令重新安装软件包？
您可以使用带有重新安装选项的yum命令。
这将重新安装与当前安装的版本相同的软件包。
语法如下：

yum reinstall packageName
yum reinstall packageName1 packageName2

在此示例中，重新安装名为keepalived的软件包，键入：

# yum reinstall keepalived

输出示例：

Loaded plugins: product-id, rhnplugin, subscription-manager
Updating certificate-based repositories.
Setting up Reinstall Process
Resolving Dependencies
--> Running transaction check
---> Package keepalived.x86_64 0:1.2.2-2.el6 will be reinstalled
--> Finished Dependency Resolution

Dependencies Resolved

=================================================================================================================================================
Package                             Arch                            Version                                 Repository                     Size
=================================================================================================================================================
Reinstalling:
keepalived                          x86_64                          1.2.2-2.el6                             epel                          147 k

Transaction Summary
=================================================================================================================================================
Reinstall     1 Package(s)

Total download size: 147 k
Installed size: 380 k
Is this ok [y/N]: y
Downloading Packages:
keepalived-1.2.2-2.el6.x86_64.rpm                                                                                         | 147 kB     00:00     
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing : keepalived-1.2.2-2.el6.x86_64                                                                                                 1/1 
Installed products updated.

Installed:
  keepalived.x86_64 0:1.2.2-2.el6

注意：这不适用于仅安装软件包，例如RHEL内核软件包。