记一次centos7 下telnet-server 的安装过程（步骤详细！！！）

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安装telnet-server 和xinetd

查找与telnet 有关的程序包

[root@slave2 ~]# yum list |grep telnet
telnet.x86_64                               1:0.17-64.el7              base
telnet-server.x86_64                        1:0.17-64.el7              base

安装telnet

[root@slave2 ~]# yum install telnet-server.x86_64
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirrors.tuna.tsinghua.edu.cn
 * extras: mirrors.tuna.tsinghua.edu.cn
 * updates: mirrors.tuna.tsinghua.edu.cn
base                                                             | 3.6 kB  00:00:00
.......

查找与xinetd 有关的程序包

[root@slave2 ~]# yum list |grep xinetd
xinetd.x86_64                               2:2.3.15-13.el7            base

安装xinetd

[root@slave2 ~]# yum install telnet-server.x86_64
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirrors.tuna.tsinghua.edu.cn
 * extras: mirrors.tuna.tsinghua.edu.cn
 * updates: mirrors.tuna.tsinghua.edu.cn
base                                                             | 3.6 kB  00:00:00
extras                                                           | 3.4 kB  00:00:00
updates                                                          | 3.4 kB  00:00:00
updates/7/x86_64/primary_db                                      | 1.3 MB  00:00:00
Resolving Dependencies
--> Running transaction check
..........

设置开机自启

systemctl enable xinetd.service

systemctl enable telnet.socket

启动服务

[root@slave2 ~]# systemctl start telnet.socket
[root@slave2 ~]# systemctl start xinetd

查看启动状态

[root@slave2 ~]# systemctl status telnet.socket
● telnet.socket - Telnet Server Activation Socket
   Loaded: loaded (/usr/lib/systemd/system/telnet.socket; disabled; vendor preset: disabled)
   Active: active (listening) since Fri 2019-01-11 10:27:17 CST; 37s ago
     Docs: man:telnetd(8)
   Listen: [::]:23 (Stream)
 Accepted: 0; Connected: 0

Jan 11 10:27:17 slave2 systemd[1]: Listening on Telnet Server Activation Socket.
Jan 11 10:27:17 slave2 systemd[1]: Starting Telnet Server Activation Socket.

OK ! 启动成功