ubuntu用apt-get安装memcache
http://www.cnblogs.com/wangkongming/p/4073121.html
简单明了
http://5ydycm.blog.51cto.com/115934/185116/
http://www.linuxidc.com/Linux/2011-11/47476.htm
http://www.linuxidc.com/Linux/2013-06/85832.htm