-bash: telnet: command not found

1、Linux centos 运行telnet命令，出现下面的错误提示：

[root@hdp2 ~]# telnet hdp1 44444
-bash: telnet: command not found

2、检查服务是否安装

[root@hdp2 ~]# rpm -qa telnet*

3、安装talnet服务

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

[root@hdp2 ~]# yum list telnet*  
Loaded plugins: fastestmirror
Determining fastest mirrors
 * base: mirrors.huaweicloud.com
 * extras: mirrors.huaweicloud.com
 * updates: mirrors.njupt.edu.cn
base                                                                 | 3.7 kB     00:00     
extras                                                               | 3.4 kB     00:00     
extras/primary_db                                                    |  26 kB     00:00     
mysql-connectors-community                                           | 2.5 kB     00:00     
mysql-tools-community                                                | 2.5 kB     00:00     
mysql57-community                                                    | 2.5 kB     00:00     
updates                                                              | 3.4 kB     00:00     
updates/primary_db                                                   | 1.9 MB     00:04     
Available Packages
telnet.x86_64                                  1:0.17-48.el6                            base
telnet-server.x86_64                           1:0.17-48.el6                            base
[root@hdp2 ~]# yum install telnet-server 
Loaded plugins: fastestmirror
Setting up Install Process
Loading mirror speeds from cached hostfile
 * base: mirrors.huaweicloud.com
 * extras: mirrors.huaweicloud.com
 * updates: mirrors.njupt.edu.cn
Resolving Dependencies
--> Running transaction check
---> Package telnet-server.x86_64 1:0.17-48.el6 will be installed
--> Processing Dependency: xinetd for package: 1:telnet-server-0.17-48.el6.x86_64
--> Running transaction check
---> Package xinetd.x86_64 2:2.3.14-40.el6 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

============================================================================================
 Package                 Arch             Version                      Repository      Size
============================================================================================
Installing:
 telnet-server           x86_64           1:0.17-48.el6                base            37 k
Installing for dependencies:
 xinetd                  x86_64           2:2.3.14-40.el6              base           122 k

Transaction Summary
============================================================================================
Install       2 Package(s)

Total download size: 159 k
Installed size: 313 k
Is this ok [y/N]: y
Downloading Packages:
(1/2): telnet-server-0.17-48.el6.x86_64.rpm                          |  37 kB     00:00     
(2/2): xinetd-2.3.14-40.el6.x86_64.rpm                               | 122 kB     00:00     
--------------------------------------------------------------------------------------------
Total                                                       171 kB/s | 159 kB     00:00     
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Warning: RPMDB altered outside of yum.
  Installing : 2:xinetd-2.3.14-40.el6.x86_64                                            1/2 
  Installing : 1:telnet-server-0.17-48.el6.x86_64                                       2/2 
  Verifying  : 1:telnet-server-0.17-48.el6.x86_64                                       1/2 
  Verifying  : 2:xinetd-2.3.14-40.el6.x86_64                                            2/2 

Installed:
  telnet-server.x86_64 1:0.17-48.el6                                                        

Dependency Installed:
  xinetd.x86_64 2:2.3.14-40.el6                                                             

Complete!
[root@hdp2 ~]# yum install telnet.*
Loaded plugins: fastestmirror
Setting up Install Process
Loading mirror speeds from cached hostfile
 * base: mirrors.huaweicloud.com
 * extras: mirrors.huaweicloud.com
 * updates: mirrors.njupt.edu.cn
Resolving Dependencies
--> Running transaction check
---> Package telnet.x86_64 1:0.17-48.el6 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

============================================================================================
 Package             Arch                Version                    Repository         Size
============================================================================================
Installing:
 telnet              x86_64              1:0.17-48.el6              base               58 k

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

Total download size: 58 k
Installed size: 109 k
Is this ok [y/N]: y
Downloading Packages:
telnet-0.17-48.el6.x86_64.rpm                                        |  58 kB     00:00     
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running 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@hdp2 ~]# rpm -q telnet
telnet-0.17-48.el6.x86_64
[root@hdp2 ~]# telnet hdp1 44444
Trying 192.168.59.130...
Connected to hdp1.
Escape character is '^]'.
hello jim
OK