centos开启telnet登录

yum install telnet*

rpm -qa |grep telnet


vi /etc/xinetd.d/telnet 
      service telnet
      {
              flags           = REUSE
              socket_type     = stream
              wait            = no
              user            = root
              server          = /usr/sbin/in.telnetd
              log_on_failure  += USERID
              disable         = no

      }
service xinetd start|stop|restart

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