Linux下面telnet ip 端口號 報錯誤“Unable to connect to remote host:Connection refused”的時候，大部分是目標機的端口對應的服務宕掉了。
先用netstat -napt命令，看系統有沒有在監聽你telnet的端口號，若沒有對應的端口號，而該機器提供該端口的服務，直接重啟下端口對應的服務，啟動成功后在用netstat -napt查看端口，一般即可顯示出來，最后telnet端口應該就是通的了。
stats 查看memcache的命中率 緩存命中率 = get_hits/cmd_get * 100%
telnet報“Unable to connect to remote host:Connection refused”錯誤
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