root@10-2-144-102:~# ssh-keygen -t rsa

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:PBf2vgXQlgU0plOxPSkoVLUzf89n21g8OYlGKAXD0Qc root@10-2-144-102

The key's randomart image is:

+---[RSA 2048]----+

| o=+EXo. |

| . .oB O . |

| . B.@ + |

| . o.*.= . |

| S...o.. .|

| o.....++|

| .o.=B|

| .o +*|

| . ...|

+----[SHA256]-----+