Log on to the Linux server using SSH without a password

Log on to the Linux server using SSH without a password

In the following example, ssky-keygen and ssh-copy-id can be used to log on to a remote Linux host without a password.
Ssh-keygen creates the public key and key.
Ssh-copy-id copies the public key of the local host to the authorized_keys file of the remote host.
The ssh-copy-id will also be sent to the user home directory (home) and ~ of the remote host ~ /. Ssh, and ~ /. Ssh/authorized_keys.

Step 1: Use ssh-key-gen to create a public key and a key on the local host

Bkjia @ local-host $ ssh-keygen-t rsa
Enter file in which to save the key (/home/jsmith/. ssh/id_rsa): [Enter key]
Enter passphrase (empty for no passphrase): [Press enter key]
Enter same passphrase again: [Pess enter key]
Your identification has been saved in/home/jsmith/. ssh/id_rsa.
Your public key has been saved in/home/jsmith/. ssh/id_rsa.pub.
The key fingerprint is: 33: b3: fe: af: 95: 95: 18: 11: 31: d5: de: 96: 2f: f2: 35: f9
Bkjia @ local-host

Step 2: Use ssh-copy-id to copy the public key to the remote host.

Bkjia @ local-host $ ssh-copy-id-I ~ /. Ssh/id_rsa.pub [email protected]
Bkjia @ 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.

[Note: The ssh-copy-id appends the key to. ssh/authorized_key of the remote host.]

Bkjia @ local-host $ ssh remote-host
Last login: Sun Nov 16 17:22:33 2008 from 192.168.1.2
Bkjia @ remote-host $

[Note: You have logged on to the remote host]

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