[root@jenkins ~]# ssh-keygen -t rsa ##在命令行输入此命令，直接按三次回车
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:CMTq1mN585C1re8Inew2u3FfH4be9cYpJk1exBIF6PQ [email protected]
The key's randomart image is:
+---[RSA 2048]----+
| .. ..o. |
| .. o . |
| .. o . o |
| . . .. . E o |
| . . ..oSo o |
| o = =o... ... |
| . . o.+=.. +.o+o|
| o=+ o.*oo*|
| .=*o +..oo|
+----[SHA256]-----+
[root@jenkins ~]# ls /root/.ssh/ ##在这目录下生成 私钥和公钥
id_rsa id_rsa.pub
[root@jenkins ~]# cat /root/.ssh/id_rsa.pub
##查看公钥内容
##复制内容并将内容保存到想登陆的服务器的/root/.ssh/authorized_keys
## authorized_keys需要自己创建，将复制的内容追加到文件里面，一个公钥放一行，可以检查下公钥有没有跨行。创建文件的命令为：touch authorized_keys
给文件添加权限
[root@cheshi ~]# chmod 700 /root/.ssh
[root@cheshi ~]# chmod 600 /root/.ssh/authorized_keys
[root@jenkins ~]# ssh 想登陆服务器的IP地址
## 登录时不用输入密码