1.Linux系统安装memcached，首先要先安装libevent库。
yum install libevent libevent-deve
2.安装memcached
yum install -y memcached
3.启动
/usr/bin/memcached -d -m 1024 -u root -p 11211 -c 1024 -P /tmp/memcached.pid
4.测试
ps -ef | grep memcahed
