（1）执行如下命令，生成公钥
ssh-keygen -t rsa -C "hitredrose2100@163.com"
然后连续按回车
[root@iZbp1flzt6x7pxmxfhmxeeZ .ssh]# ssh-keygen -t rsa -C "hitredrose2100@163.com"
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:tX1404fAO3HS1oXG0xOHuowHVHSV4hIFkAN1k2o51Kc hitredrose2100@163.com
The key's randomart image is:
+---[RSA 2048]----+
| .oo+**o.**|
| +o=.=*++|
| ..= Xo=.o|
| *.E.X o |
| S o+*.= o|
| . ++ ..|
| . |
| |
| |
+----[SHA256]-----+
[root@iZbp1flzt6x7pxmxfhmxeeZ .ssh]#
（2）查看公钥
cat /root/.ssh/id_rsa.pub
如：
[root@iZbp1flzt6x7pxmxfhmxeeZ .ssh]# cat /root/.ssh/id_rsa.pub
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCuXj1pbpJkEJLX/ktZOtYYSRG3TQRHgh1a03kl0TgX7hKT0sPhtXRVkRBtwEceHW9b8wClklKK64XFgiV1jLr7TbR0jkrDlv06vfsb1hxQwtgIsBandbivxBNm3m4fWLv9ebq/QCPxhLQDG87ks6ZIGQbNxiHbWYfxbqlPXAAZBfUVWVgkpWz86UAxOQBjjVQfTTJ85Bd1OFNjJB7Gt6T1ozp1Tp0Z2Goc6tGkEmiBOqErEADTYv/mE+qVpTANAa6ylbvs8JZbvb44iz84/2fPXS+0hJJ5vsVt35pWZaiDZFIJrJ+mSLwvGEdn2Z7IHBHxc8ANjiR+uZaQaYsZY7xH hitredrose2100@163.com
[root@iZbp1flzt6x7pxmxfhmxeeZ .ssh]#
（3）查看私钥
cat /root/.ssh/id_rsa
如：
[root@iZbp1flzt6x7pxmxfhmxeeZ .ssh]# cat /root/.ssh/id_rsa
-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
[root@iZbp1flzt6x7pxmxfhmxeeZ .ssh]#