HOWTO- Generate SSH Key

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Generate SSH Key Pair:

  • Type the following command to generate an SSH key pair. The -t option specifies the type of key to create (in this case, RSA), and the -b option specifies the number of bits in the key (2048 is a common choice).


ssh-keygen -t rsa -b 2048
  • Press Enter. It will prompt you for a location to save the key. The default location is usually fine, so just press Enter.
  • It will also ask you to enter a passphrase. This is an additional layer of security. You can enter a passphrase or leave it blank, but using a passphrase is recommended for better security.

  • Locate Your SSH Key:

    • By default, the keys are stored in the ~/.ssh/ directory. Your private key will be named id_rsa and your public key will be named id_rsa.pub.

  • Display Your Public Key: You can view your public key using the following command:


    • cat ~/.ssh/id_rsa.pub

    Copy the output.

  • Add the Public Key to the Remote Server:

    • Log in to your remote server.

    • Navigate to the ~/.ssh/ directory (create it if it doesn't exist).

    • Open or create a file named authorized_keys (or append to an existing one) and paste the contents of your public key into this file.


    • echo "your_public_key_here" >> ~/.ssh/authorized_keys


    Make sure to replace "your_public_key_here" with the actual public key you copied.

  • Secure Your Private Key:

    • Ensure that your private key (id_rsa) is only readable by you:

    • chmod 600 ~/.ssh/id_rsa


    Now you should be able to SSH into your remote server using the private key. When connecting, the SSH client will use your private key for authentication.

 

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