Generate SSH Keys on Linux

You can generate an SSH key pair directly in Site Tools, or you can generate the keys yourself and just upload the public one in Site Tools to use with your hosting account. When generating SSH keys yourself under Linux, you can use the ssh-keygen command.

1. How do I generate a public SSH key?
2. How do I find my SSH key in Linux?
3. How do I generate a public and private SSH key in Linux?
4. Is Ed25519 better than RSA?
5. Where are SSH private keys stored?
6. Which SSH key is used?
7. How do I connect to a SSH key?
8. How do I know which SSH key I am using?
9. How public and private keys work in SSH?
10. What is SSH key?
11. What is the most secure SSH key?
12. Why are Ed25519 keys so short?
13. Do I need a passphrase for ssh key?

How do I generate a public SSH key?

Generating an SSH key

1. Open the PuTTYgen program.
2. For Type of key to generate, select SSH-2 RSA.
3. Click the Generate button.
4. Move your mouse in the area below the progress bar. ...
5. Type a passphrase in the Key passphrase field. ...
6. Click the Save private key button to save the private key.

How do I find my SSH key in Linux?

Checking for existing SSH keys

1. Open .
2. Enter ls -al ~/.ssh to see if existing SSH keys are present: $ ls -al ~/.ssh # Lists the files in your .ssh directory, if they exist.
3. Check the directory listing to see if you already have a public SSH key. By default, the filenames of the public keys are one of the following: id_rsa.pub. id_ecdsa.pub.

How do I generate a public and private SSH key in Linux?

In Linux, creating a public/private SSH key is easy.

1. Open a terminal. ...
2. In the next screen, you should see a prompt, asking you for the location to save the key. ...
3. Next, you will be prompted to enter passphrase. ...
4. Your public and private SSH key should now be generated. ...
5. Upload the id_rsa.

Is Ed25519 better than RSA?

Today, the RSA is the most widely used public-key algorithm for SSH key. But compared to Ed25519, it's slower and even considered not safe if it's generated with the key smaller than 2048-bit length. The Ed25519 public-key is compact. ... It's also fast to perform batch signature verification with Ed25519.

Where are SSH private keys stored?

By default, the private key is stored in ~/. ssh/id_rsa and the public key is stored in ~/. ssh/id_rsa.

Which SSH key is used?

ssh/config it will use the default private key file. The default file is ~/. ssh/id_rsa or ~/.

How do I connect to a SSH key?

Manually Copy the SSH Key with PuTTY

1. Launch putty.exe . ...
2. Scroll back to the top of the Category window and click Session. ...
3. Click the Open button to establish a connection. ...
4. Once you're logged in to the remote server, configure it to authenticate with your SSH key pair instead of a user's password.

How do I know which SSH key I am using?

You will need to turn up logging. On the client side, "ssh -v" will which private key was used. On the server side, default log levels will only show that a public key was used (as opposed to password auth). You will need to set the logging level in sshd_config to at least VERBOSE.

How public and private keys work in SSH?

SSH keys are a matching set of cryptographic keys which can be used for authentication. Each set contains a public and a private key. The public key can be shared freely without concern, while the private key must be vigilantly guarded and never exposed to anyone.

What is SSH key?

An SSH key is an access credential for the SSH (secure shell) network protocol. This authenticated and encrypted secure network protocol is used for remote communication between machines on an unsecured open network.

What is the most secure SSH key?

When it comes down to it, the choice is between RSA ²⁰⁴⁸⁄₄₀₉₆ and Ed25519 and the trade-off is between performance and compatibility. RSA is universally supported among SSH clients while EdDSA performs much faster and provides the same level of security with significantly smaller keys.

Why are Ed25519 keys so short?

Two reasons: 1) they are a lot shorter for the same level of security and 2) any random number can be an Ed25519 key. To generate an RSA you have to generate two large random primes, and the code that does this is complicated an so can more easily be (and in the past has been) compromised to generate weak keys.

Do I need a passphrase for ssh key?

When creating SSH keys, you can create them with or without a passphrase. If you do create a key with passphrase, you will be asked for passphrase every time you try to communicate with your Git repository in Beanstalk. Using passphrases increases the security when you are using SSH keys.