yum安裝telnet服務

1.查看有無安裝telnet

[root@localhost ~]# rpm -qa |grep telnet

2.查看yum源

[root@localhost ~]# yum list |grep telnet

telnet.x86_64??????????????????????????????1:0.17-48.el6??????????????@base

telnet-server.x86_64???????????????????????1:0.17-48.el6??????????????@base

[root@localhost ~]#

3.執行yum安裝

[root@localhost ~]# yum -y install telnet-server

4.查看

[root@localhost ~]# rpm -qa |grep telnet

telnet-0.17-48.el6.x86_64

telnet-server-0.17-48.el6.x86_64

[root@localhost ~]#

5.開啟telnet服務并查看狀態

[root@localhost ~]# /etc/init.d/xinetd start

Starting xinetd:

[root@localhost ~]# service xinedt status

xinedt: unrecognized service

[root@localhost ~]# service xinetd status

xinetd (pid?9636) is running...

[root@localhost ~]#

6.查看服務有沒有安裝上

[root@localhost ~]# chkconfig --list |grep telnet

telnet:????????on

[root@localhost ~]# chkconfig --list |grep xinted

[root@localhost ~]# chkconfig --list |grep xinetd

xinetd?????????0:off?? 1:off?? 2:off?? 3:on??? 4:on??? 5:on??? 6:off

xinetd based services:

[root@localhost ~]#

7.查看telnet端口是否開啟，telnet默認端口為23所以用以下命令可以查看

[root@localhost ~]# netstat -apn |grep 23

tcp????? ??0????? 0192.168.1.52:23????????????192.168.1.5:4403???????????ESTABLISHED 9670/in.telnetd

tcp???????0????? 0:::23??????????????????????:::*???????????????????????LISTEN?????9636/xinetd

unix?3????? []????????STREAM????CONNECTED? ???11923? 1288/master

[root@localhost ~]#

顯示端口為listenning然后服務為xinetd

8.測試可以使用本服務器測試也可以用客戶端測試

這邊是用客戶端

這里有一點需要注意的是默認是不允許管理員登錄的

所以創建新用戶然后用新用戶登錄，創建的新用戶可以在[root@localhost ~]# cat /etc/passwd

root:x:0:0:root:/root:/bin/bash

bin:x:1:1:bin:/bin:/sbin/nologin

daemon:x:2:2:daemon:/sbin:/sbin/nologin

adm:x:3:4:adm:/var/adm:/sbin/nologin

lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin

sync:x:5:0:sync:/sbin:/bin/sync

shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown

halt:x:7:0:halt:/sbin:/sbin/halt

mail:x:8:12:mail:/var/spool/mail:/sbin/nologin

uucp:x:10:14:uucp:/var/spool/uucp:/sbin/nologin

operator:x:11:0:operator:/root:/sbin/nologin

games:x:12:100:games:/usr/games:/sbin/nologin

gopher:x:13:30:gopher:/var/gopher:/sbin/nologin

ftp:x:14:50:FTP User:/var/ftp:/sbin/nologin

nobody:x:99:99:Nobody:/:/sbin/nologin

vcsa:x:69:69:virtual console memoryowner:/dev:/sbin/nologin

saslauth:x:499:76:"Saslauthduser":/var/empty/saslauth:/sbin/nologin

postfix:x:89:89::/var/spool/postfix:/sbin/nologin

sshd:x:74:74:Privilege-separatedSSH:/var/empty/sshd:/sbin/nologin

zuzhao:x:500:500::/home/zuzhao:/bin/bash

apache:x:48:48:Apache:/var/www:/sbin/nologin

mysql:x:27:27:MySQL Server:/var/lib/mysql:/bin/bash

[root@localhost ~]#

中看到然后在登錄

完成。

總結

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