Su - sleep 301. Enter the administrator password: sudo passwd root password (2) install memcached: yum -y install wget memcached3. Start memcached: systemctl start memcached can't start with: service memcached start4. Start server: all users to perform file: chmod + x/root/servercd/root/root/server success! -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --=-- -- -- -- -- -- -- -- -- -- ELB: load balancer: create a security group: HTTP to add two port 80, 22, HTTPS port 443