Linux [ 安装 telnet ]

打开服务器上的shell窗口，按以下步骤操作：

    1.执行命令：sudo apt-get intall xinted telnetd  //安装telnet软件包，sudo命令需输入当前用户密码

    2.安装成功后系统有相应提示。执行命令：sudo vi /etc/inetd.conf   //打开telnet配置文件

     # Simple configuration file for xinetd
     # Some defaults, and include /etc/xinetd.d/

       defaults
      {

       # Please note that you need a log_type line to be able to use log_on_success
       # and log_on_failure. The default is the following :
       # log_type = SYSLOG daemon info(插入红色部分）
       instances = 60
       log_type = SYSLOG authpriv
       log_on_success = HOST PID
       log_on_failure = HOST
       cps = 25 30
      }

      includedir /etc/xinetd.d

    4. sudo vi /etc/xinetd.d/telnet 进入编辑窗口，添加以下红色部分。

      # default: on
      # description: The telnet server serves telnet sessions; it uses \
      # unencrypted username/password pairs for authentication.
        service telnet
       {
         disable = no

         bind =219.228.57.4
         only_from=219.228.1.0/24
         #上面这两行说明仅提供内部网段！
         Instance =UNLIMITED
         Nice =0
         flags = REUSE
         socket_type = stream
         wait = no
         user = root
         server = /usr/sbin/in.telnetd
         log_on_failure += USERID
        }

    5. 重启：sudo restart

       or 重启网络服务：sudo /etc/init.d/xinetd  restart