注意：不要在AWS上安装 iptables-service，否则会导致无法恢复的网络异常
允许ping 安全组，入站 添加规则：自定义 ICMP 规则 - IPv4，任何位置 chmod 400 aws.pem 通过其 公有 DNS 连接，默认账户名ec2-user ssh -i "aws.pem" ec2-user@ec2-52-221-186-41.ap-southeast-1.compute.amazonaws.com sudo passwd root su root vi /etc/ssh/sshd_config PasswordAuthentication yes PermitRootLogin no sudo systemctl restart sshd passwd ec2-user vi /etc/sysconfig/selinux SELINUX=disabled 添加新用户： adduser username passwd username Login as new username： su root userdel -r ec2-user yum-config-manager --enable rhui-REGION-rhel-server-extras rhui-REGION-rhel-server-optional yum install wget wget http://dl.fedoraproject.org/pub/epel/7/x86_64/Packages/e/epel-release-7-11.noarch.rpm rpm -vih epel-release-7-11.noarch.rpm vi /etc/yum.repos.d/nginx.repo [nginx] name=nginx repo baseurl=http://nginx.org/packages/rhel/7/$basearch/ gpgcheck=0 enabled=1 vi /etc/yum.repos.d/mongodb-org-3.4.repo [mongodb-org-3.4] name=MongoDB Repository baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/3.4/x86_64/ gpgcheck=1 enabled=1 gpgkey=https://www.mongodb.org/static/pgp/server-3.4.asc