1、生成密鑰文件

ssh-keygen -t rsa? ? #生成密鑰

Generating public/private rsa key pair.

Enter file in which to save the key (/root/.ssh/id_rsa): 密鑰生成地址

Enter passphrase (empty for no passphrase): 輸入密碼

Enter same passphrase again: 確認(rèn)密碼

Your identification has been saved in /root/.ssh/id_rsa.

Your public key has been saved in /root/.ssh/id_rsa.pub.

chmod -R 700 /root/.ssh/? ? #設(shè)置權(quán)限,僅當(dāng)前用戶可以讀寫

下載該文件下的id_rsa私鑰文件

2、設(shè)置ssh只能密鑰登錄

vim /etc/ssh/sshd_config? #編輯ssh配置文件

PasswordAuthentication no? #關(guān)閉密碼登錄

systemctl restart sshd? #重啟服務(wù)

注意:一定要在確認(rèn)密鑰文件可以使用后再關(guān)閉密碼登錄