ubuntu安装 sudo apt-get install memcached
停止memcached服务：sudo systemctl stop memcached
激活memcached服务：sudo systemctl enable memcached
启动memcached服务：sudo systemctl start memcached
检查memcached服务是否正确启动：sudo netstat -anp|grep 11211
telnet连接memcached服务器：telnet 127.0.0.1 11211
退出telnet 用quit命令
