add ssh key to server

1. How do I add a public SSH key to my server?
2. Where do I put SSH keys?
3. How do I SSH with a key?
4. How do I copy a SSH key to another machine?
5. How do I add a key to my server?
6. How do I find my SSH public key?
7. What type of SSH key should I use?
8. How does a SSH key look like?
9. Can I reuse SSH key?
10. How do I copy a SSH key to multiple servers at a time?
11. Can we use same SSH key on multiple computers?

How do I add a public SSH key to my server?

Setting up public key authentication

1. Generate an SSH Key. With OpenSSH, an SSH key is created using ssh-keygen. ...
2. Copy the key to a server. ...
3. Test the new key. ...
4. Troubleshooting. ...
5. Use a passphrase when possible. ...
6. Add a command restriction when possible. ...
7. Managing SSH keys. ...
8. Installation using Homebrew.

Where do I put SSH keys?

SSH keys are typically configured in an authorized_keys file in . ssh subdirectory in the user's home directory. Typically a system administrator would first create a key using ssh-keygen and then install it as an authorized key on a server using the ssh-copy-id tool.

How do I SSH with a key?

Public key authentication works like this:

1. Generate a key pair.
2. Give someone (or a server) the public key.
3. Later, anytime you want to authenticate, the person (or the server) asks you to prove you have the private key that corresponds to the public key.
4. You prove you have the private key.

How do I copy a SSH key to another machine?

Copying SSH ~/. ssh/id_rsa between machines

1. Step 1: Create an SSH keypair. If you don't already have a id_rsa and id_rsa. ...
2. Step 2: Copy the key to the remote box. This is where ssh-copy-id comes in. ...
3. Step 3: Test it. ...
4. Step 4: ssh-add and ssh-agent. ...
5. The alternative. ...
6. Footnote.

How do I add a key to my server?

Method 2: Manually copy the public ssh key to the server

1. Step 1: Get the public key. Ask the end user to provide the public key by typing the following command: cat ~/.ssh/id_rsa.pub. ...
2. Step 2: Create ssh directory in the user's home directory (as a sysadmin) ...
3. Step 3: Set appropriate permission to the file.

How do I find my SSH public key?

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.

What type of SSH key should I use?

Unless there is a good reason not to, you should always authenticate using SSH keys. A number of cryptographic algorithms can be used to generate SSH keys, including RSA, DSA, and ECDSA. RSA keys are generally preferred and are the default key type.

How does a SSH key look like?

An SSH key is an alternate way to identify yourself that doesn't require you to enter you username and password every time. SSH keys come in pairs, a public key that gets shared with services like GitHub, and a private key that is stored only on your computer. If the keys match, you're granted access.

Can I reuse SSH key?

2 Answers. You can copy your older ssh keys to the new machine. ... You might need to explicitly specify the user account you want to ssh into like ssh user@server . Also, you might want to go through more answers on reusing ssh keys.

How do I copy a SSH key to multiple servers at a time?

How to add ssh keys to multiple hosts

1. sshpass pass your password to the ssh prompt.
2. -o StrictHostKeyChecking=no ignores the “host identity not established” prompt, allowing sshpass to do its job.

Can we use same SSH key on multiple computers?

4 Answers. The same SSH key should be able to be used from multiple clients. I have different SSH keys for different networks and they're actually stored on an encrypted USB drive that I use from several different computers without a problem.