VM下安装一台新的centos, 因为是新机器，所以yum clean all，yum -y update

现在开始安装

1. yum -y install memcached

2. memcached -h

3. vi /etc/sysconfig/memcached 查看配置文件

    可以修改端口，用户和最大内存，缓存大小        

    PORT="11211"

    USER="memcached"

    MAXCONN="1024"

    CACHESIZE="64"

    OPTIONS=""

启动：

systemctl start memcached

ps auxf|grep memcached

查看启动情况

memcached 常用命令

//重启，启动，开机启动，状态，关闭

systemctl restart memcached

systemctl start memcached

systemctl enable memcached

systemctl status memcached

systemctl stop memcached

ps：源码地址：http://pecl.php.net/package/memcached