In this tutorial I will describe how you can setup SSH login without password using ssh-keygen and ssh-copy-id. ssh-keygen is used to create the public and private keys and ssh-copy-id used to copies the local host’s public key to the remote-host’s authorized_key file. ssh-copy-id also assigns proper permission to the remote-host’s home, ~/.ssh, and ~/.ssh/authorized_keys.
Follow the below steps to login your remote Linux server without password.
Step #1: Creating Public and Private keys Using ssh-key-gen
[email protected]$ [local-host here] [email protected]host$ ssh-keygen Generating public/private rsa key pair. Enter file in which to save the key (/home/user/.ssh/id_rsa):[Press Enter key] Enter passphrase (empty for no passphrase): [Press enter key] Enter same passphrase again: [Press enter key] Your identification has been saved in /home/user/.ssh/id_rsa. Your public key has been saved in /home/user/.ssh/id_rsa.pub. The key fingerprint is: 33:b3:fe:af:95:95:18:11:31:d5:de:96:2f:f2:35:f9 [email protected]
Step #2: Copy Public Key on Remote Host using ssh-copy-id
[email protected]$ ssh-copy-id -i ~/.ssh/id_rsa.pub remote-host [email protected]'s password: try logging into the machine, with "ssh 'remote-host'", and check in: .ssh/authorized_keys Make sure we haven't added any extra keys.
Note :- ssh-copy-id will append the keys to the remote host’s .ssh/authorized_key.
Step #3: Login to Remote Host without Password
[email protected]$ ssh remote-host Last login: Mon Feb 17 17:22:33 2017 from 192.168.1.5 [Here SSH will not ask for type password.] [email protected]$ [Here you are on remote host]
I hope this article will help to setup SSH Login Without Password. If you have any queries and problem please comment in comment section.