How do I configure SSH key based authentication on a Linux server?

Contents

How do I enable SSH key authentication in Linux?

Procedure

Use the ssh-keygen tool to create a key pair. …
Validate that the keys were generated. …
Enable key-based authentication in the /etc/ssh directory on the SSH server. …
Copy the rsa. …
If you have an existing authorized_keys file, edit it to remove any no-pty restrictions.

How do I generate an SSH key authentication?

Set up public key authentication using SSH on a Linux or macOS computer. To set up public key authentication using SSH on a Linux or macOS computer: Log into the computer you’ll use to access the remote host, and then use command-line SSH to generate a key pair using the RSA algorithm.

How do I generate an SSH key in Linux?

3. Generate a new key

Open a terminal on your local computer and enter the following: …
Just press <Enter> to accept the default location and file name. …
Enter, and re-enter, a passphrase when prompted. …
You’re done and you can now go to either SSH user keys for personal use or SSH access keys for system use.

How do I connect to a private key in Linux?

Log in with a private key

Using a text editor, create a file in which to store your private key. …
To edit the file in vim, type the following command: vim deployment_key.txt.
After the editor starts, press i to turn on insert mode.
Paste your private key, such as the one in the following image, into the file.

Upload Your Public Key

To use ssh-copy-id , pass your username and the IP address of the server you would like to access: ssh-copy-id your_username@192.0.2.0.
You’ll see output like the following, and a prompt to enter your user’s password: …
Verify that you can log in to the server with your key.

Where is my SSH private key?

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

What format is my private key?

PKCS #12. This is also known as PFX. This format can contain private keys (RSA or DSA), public keys (RSA or DSA) and X. 509 certificates.

How do I find my SSH username and password?

Enter your Server Address, Port Number, Username and Password as provided by your host. Click the Show Public Key button to reveal the VaultPress public key file. Copy that and add it to your server’s ~/. ssh/authorized_keys file .

How do you generate a public key?

How to Create a Public/Private Key Pair

Start the key generation program. …
Enter the path to the file that will hold the key. …
Enter a passphrase for using your key. …
Re-enter the passphrase to confirm it. …
Check the results. …
Copy the public key and append the key to the $HOME/.

How do I copy a private key in Linux?

2 Answers

Create a new private key on your new local machine. Then copy the public key (it comes with the private key, or can be generated from it). to the server. …
On the old local machine. Using putty, tell it to export your private-key in open-ssh format, then copy this to the new local machine (running openssh).

What is SSH private key?

An SSH key relies upon the use of two related keys, a public key and a private key, that together create a key pair that is used as the secure access credential. The private key is secret, known only to the user, and should be encrypted and stored safely.

How do I connect to SSH?

How to Connect via SSH

Open the SSH terminal on your machine and run the following command: ssh your_username@host_ip_address. …
Type in your password and hit Enter. …
When you are connecting to a server for the very first time, it will ask you if you want to continue connecting.