依次执行如下命令： 　
　　 yum list telnet* 列出telnet相关的安装包 yum install telnet-server 安装telnet服务 yum install telnet.* 安装telnet客户端


执行效果如下：

[root@localhost ~]# yum list telnet* Loaded plugins: fastestmirror, refresh-packagekit, securityLoading mirror speeds from cached hostfile * base: mirrors.cn99.com * extras: mirrors.shu.edu.cn * updates: mirrors.cn99.comAvailable Packagestelnet.x86_64 1:0.17-48.el6 basetelnet-server.x86_64 1:0.17-48.el6 base

[root@localhost ~]# yum install telnet-serverLoaded plugins: fastestmirror, refresh-packagekit, securityLoading mirror speeds from cached hostfile * base: mirrors.cn99.com * extras: mirrors.shu.edu.cn * updates: mirrors.cn99.comSetting up Install ProcessResolving Dependencies--> Running transaction check---> Package telnet-server.x86_64 1:0.17-48.el6 will be installed--> Finished Dependency ResolutionDependencies Resolved================================================================================ Package Arch Version Repository Size================================================================================Installing: telnet-server x86_64 1:0.17-48.el6 base 37 kTransaction Summary================================================================================Install 1 Package(s)Total download size: 37 kInstalled size: 54 kIs this ok [y/N]: yDownloading Packages:telnet-server-0.17-48.el6.x86_64.rpm | 37 kB 00:00 Running rpm_check_debugRunning Transaction TestTransaction Test SucceededRunning TransactionWarning: RPMDB altered outside of yum. Installing : 1:telnet-server-0.17-48.el6.x86_64 1/1 Verifying : 1:telnet-server-0.17-48.el6.x86_64 1/1 Installed: telnet-server.x86_64 1:0.17-48.el6 Complete![root@localhost ~]# 

[root@localhost ~]# yum install telnet.*Loaded plugins: fastestmirror, refresh-packagekit, securityLoading mirror speeds from cached hostfile * base: mirrors.cn99.com * extras: mirrors.shu.edu.cn * updates: mirrors.cn99.comSetting up Install ProcessResolving Dependencies--> Running transaction check---> Package telnet.x86_64 1:0.17-48.el6 will be installed--> Finished Dependency ResolutionDependencies Resolved==================================================================================================================================== Package Arch Version Repository Size====================================================================================================================================Installing: telnet x86_64 1:0.17-48.el6 base 58 kTransaction Summary====================================================================================================================================Install 1 Package(s)Total download size: 58 kInstalled size: 109 kIs this ok [y/N]: yDownloading Packages:telnet-0.17-48.el6.x86_64.rpm | 58 kB 00:00 Running rpm_check_debugRunning Transaction TestTransaction Test SucceededRunning Transaction Installing : 1:telnet-0.17-48.el6.x86_64 1/1 Verifying : 1:telnet-0.17-48.el6.x86_64 1/1 Installed: telnet.x86_64 1:0.17-48.el6 Complete![root@localhost ~]#