SSH Login Menggunakan SSH Keygen

Selain menggunakan username dan password untuk ssh, kita juga dapat menggunakan ssh keygen.

Langkah Pertama buat public key dan private key menggunakan ssh-keygen.

akhal@base:~$ ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/home/akhal/.ssh/id_rsa): 
Created directory '/home/akhal/.ssh'.
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /home/akhal/.ssh/id_rsa
Your public key has been saved in /home/akhal/.ssh/id_rsa.pub
The key fingerprint is:
SHA256:DrejC3fKrrtftkZds3boNhn16SQEywyy8BO+m66vzEdRBxEI akhal@base
The key's randomart image is:
+---[RSA 3072]----+
|+E.o+o.o         |
|.+o oo. o        |
|o... o o .       |
| +...o*oo        |
|. = =ooOS.       |
| = o o+ =        |
|o o   .o         |
|o+     .o.       |
|B=o    o+.       |
+----[SHA256]-----+

Langkah kedua copy public key ke remote-host dengan menggunakan ssh-copy-id.

akhal@base:~$ ssh-copy-id -i ~/.ssh/id_rsa.pub remote-host
akhal@remote-host's password:
Now try logging into the machine, with "ssh 'remote-host'", and check in:

.ssh/authorized_keys

to make sure we haven't added extra keys that you weren't expecting.

Langkah terakhir login remote-host tanpa memasukkkan password.

akhal@base:~$ ssh akhal@remote-host
Last login: Sun Nov 24 13:33:33 2021 from 192.168.1.10
[Note: SSH tidak meminta password untuk login]

akhal@remote-host$ [Note: Sekarang Anda sudah berpindah ke remote-host]