1.配置安全组入方向 TCP 22/22 端口允许通过

2.重新启动服务器

3.root登录

4.查看22端口是否开放
[root@localhost ~]# netstat -tnl
如果显示以下内容就说明22端口已经开放
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN

5.查看ssh服务是否启动
[root@localhost ~]# systemctl status sshd.service
如果显示以下内容就说明ssh服务已经启动
Loaded: loaded (/usr/lib/systemd/system/sshd.service; enabled; vendor preset: enabled)
Active: active (running) since Thu 2017-12-14 02:06:56 CST; 38min ago

Docs: man:sshd(8)

man:sshd_config(5)
Main PID: 2576 (sshd)
CGroup: /system.slice/sshd.service

└─2576 /usr/sbin/sshd -D