**一键ssh开启root登录**
```bash
sed -i 's/^#\?PermitRootLogin.*/PermitRootLogin yes/; s/^#\?PasswordAuthentication.*/PasswordAuthentication yes/' /etc/ssh/sshd_config && systemctl restart ssh && echo "SSH root 登录已开启。请确保root密码已设置。"
```

**Linux一键换源**
```bash
bash <(curl -sSL https://linuxmirrors.cn/main.sh)
```

**Docker一键换源**
```bash
bash <(curl -sSL https://linuxmirrors.cn/docker.sh)
```