1、查看有没有安装telnet服务
rpm –qa|grep telnet
没有则找安装包进行安装。如果有安装光盘，在安装光盘中找到相应的安装包进行安装。这里直接通过网络安装
2、通过yum install安装Telnet程序
[root@bogon xinetd.d]# yum list telnet-server
Loading "installonlyn" plugin
Setting up repositories
Reading repository metadata in from local files
Available Packages
telnet-server.i386 1:0.17-39.el5 base
[root@bogon xinetd.d]# yum install telnet-server
Loading "installonlyn" plugin
Setting up Install Process
Setting up repositories
Reading repository metadata in from local files
Parsing package install arguments
Resolving Dependencies
--> Populating transaction set with selected packages. Please wait.
---> Downloading header for telnet-server to pack into transaction set.
telnet-server-0.17-39.el5 100% |=========================| 8.4 kB 00:01
---> Package telnet-server.i386 1:0.17-39.el5 set to be updated
--> Running transaction check
Dependencies Resolved
=============================================================================
Package Arch Version Repository Size
=============================================================================
Installing:
telnet-server i386 1:0.17-39.el5 base 35 k
Transaction Summary
=============================================================================
Install 1 Package(s)
Update 0 Package(s)
Remove 0 Package(s)
Total download size: 35 k
Is this ok [y/N]: y 选程Yes
Downloading Packages:
(1/1): telnet-server-0.17 100% |=========================| 24 kB 00:31
http://ftp.stu.edu.tw/Linux/CentOS/5.2/os/i386/CentOS/telnet-server-0.17-39.el5.i386.rpm: [Errno 4] Socket Error: timed out
Trying other mirror.
http://centos.cs.nctu.edu.tw/5.2/os/i386/CentOS/telnet-server-0.17-39.el5.i386.rpm: [Errno 4] IOError: <urlopen error (104, 'Connection reset by peer')>
Trying other mirror.
(1/1): telnet-server-0.17 100% |=========================| 35 kB 00:00
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
Installing: telnet-server ######################### [1/1]
Installed: telnet-server.i386 1:0.17-39.el5
Complete!
3、修改配置文件more /etc/xinetd.d/telnet
[root@bogon xinetd.d]# more telnet
# default: on
# description: The telnet server serves telnet 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 = yes
}
将disable项由yes改成no。
4、重启服务生效
/etc/init.d/xinetd restart
