SSH to server without password

Posted on | Edited on |

The requirement to ssh to server without password

To ssh without password, you must meet the condition:

  • Private key in client ~/.ssh/
  • Public key in server ~/.ssh/authorized_keys

Steps to setup

  1. Create ssh key pairs by ssh-keygen

    1
    2
    3
    4
    5
    6
    7
    # Generate key
    ssh-keygen

    # Check the generated key pair
    ls ~/.ssh
    -rw-------  1 sing  staff  1679 Jun  8  2018 id_rsa
    -rw-r--r--  1 sing  staff   404 Jun  8  2018 id_rsa.pub

  2. Login to your server

  3. Copy the content of the publicKey (id_rsa.pub) to server’s ~/.ssh/authorized_keys

    1
    echo "${public key content}" >> .ssh/authorized_keys

  4. Verify ssh without password

    1
    ssh [email protected]