如何通过root账户安全登录VPS服务器？

VPS如何用root登录？三种方法帮你安全登录VPS服务器

VPS root登录的主要方法

详细操作步骤

方法一：SSH密码登录

• Windows系统：PuTTY、Xshell、Windows Terminal
• Linux/macOS系统：系统自带终端
• 移动设备：Termius、JuiceSSH

# 使用系统终端登录示例
ssh root@服务器IP地址
实际登录过程
$ ssh root@192.168.1.100
The authenticity of host '192.168.1.100 (192.168.1.100)' can't be established.
ECDSA key fingerprint is SHA256:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.1.100' (ECDSA) to the list of known hosts.
root@192.168.1.100's password: 
Last login: Fri Oct 31 20:15:32 2025 from 192.168.1.50
[root@server ~]# 

方法二：SSH密钥对登录

• 密钥生成：ssh-keygen
• 公钥上传：ssh-copy-id
• 密钥管理：密码保护私钥

# 生成SSH密钥对
$ ssh-keygen -t rsa -b 4096 -C "youremail@example.com"
Generating public/private rsa key pair.
Enter file in which to save the key (/home/user/.ssh/idrsa): 
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /home/user/.ssh/idrsa.
Your public key has been saved in /home/user/.ssh/idrsa.pub.
The key fingerprint is:
SHA256:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx youremail@example.com
上传公钥到服务器
$ ssh-copy-id root@192.168.1.100
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/home/user/.ssh/idrsa.pub"
Number of key(s) added: 1
Now try logging into the machine with: "ssh 'root@192.168.1.100'"
密钥登录验证
$ ssh root@192.168.1.100
Enter passphrase for key '/home/user/.ssh/idrsa': 
Last login: Fri Oct 31 20:20:15 2025 from 192.168.1.50
[root@server ~]# 

=== VPS Web控制台登录界面 ===
服务器IP: 192.168.1.100
用户名: root
密码: ****
登录状态: 连接成功
欢迎来到您的VPS服务器！
[root@server ~]# 

# 编辑SSH配置文件
vi /etc/ssh/sshd_config
修改以下参数
PermitRootLogin yes
PasswordAuthentication yes
重启SSH服务
systemctl restart sshd
或
service ssh restart

# 检查防火墙状态
systemctl status firewalld
或
ufw status
开放SSH端口
firewall-cmd --permanent --add-service=ssh
firewall-cmd --reload