[[email protected] Solin]# rpm -qa | grep telnet 
[[email protected] Solin]# 

二、安裝telnet客戶端、服務端(如果已安裝telnet則跳過此步驟)

yum -y install telnet*

三、檢查是否安裝xinetd

[[email protected] Solin]# rpm -qa | grep xinetd
[[email protected]
 
 Solin]# 

四、安裝xinetd服務(如果已安裝xinetd則跳過此步驟)

yum -y install xinetd

五、telnet服務安裝之後，預設是不開啟服務，修改檔案/etc/xinetd.d/telnet來開啟服務

注：第一次修改，此檔案若不存在，可自己vim建立修改：修改 disable = yes 為 disable = no

[[email protected] xinetd.d]# pwd
/etc/xinetd.d
[[email protected] xinetd.d]# ls
chargen-dgram   daytime-stream  echo-dgram     time-dgram
 
chargen-stream  discard-dgram   echo-stream    time-stream
daytime-dgram   discard-stream  tcpmux-server
[[email protected] xinetd.d]# vim telnet
[[email protected] xinetd.d]# cat telnet 
# default: yes    
# description: The telnet server servestelnet sessions; it uses \   
# unencrypted username/password pairs for authentication.  
 
service telnet         
{  
  flags = REUSE  
  socket_type = stream  
  wait = no  
  user = root  
  server =/usr/sbin/in.telnetd  
  log_on_failure += USERID  
  disable = no   
}  
[[email protected] xinetd.d]# 

六、啟動telnet和依賴的xinetd服務

[[email protected] xinetd.d]# systemctl restart xinetd.service
[[email protected] xinetd.d]# ps -ef | grep xinetd  #檢視xinetd是否啟動
root       6100      1  0 10:20 ?        00:00:00 /usr/sbin/xinetd -stayalive -pidfile /var/run/xinetd.pid
root       6159   3770  0 10:21 pts/1    00:00:00 grep --color=auto xinetd
[[email protected] xinetd.d]# ps -ef | grep telnet  #檢視telnet是否啟動
root       6239   3770  0 10:22 pts/1    00:00:00 grep --color=auto telnet
[[email protected] xinetd.d]# 

七、測試telnet

在windows下開啟cmd命令列視窗，輸入telnet 192.168.1.10 回車，然後輸入使用者名稱密碼。

八、設定服務開機啟動

將xinetd服務加入開機自啟動：systemctl enable xinetd.service

將telnet服務加入開機自啟動：systemctl enable telnet.socket