Ssh-keygen Ubuntu

1. Where do I put SSH keys in Ubuntu?
2. Why is SSH key not working?
3. What is the default ssh-keygen?
4. Can I use SSH on Ubuntu?
5. Do SSH keys expire?
6. What if I lose my SSH key?

Where do I put SSH keys in Ubuntu?

ssh/id_rsa. pub Contains the DSA, ECDSA, Ed25519 or RSA public key for authentication. The contents of this file should be added to ~/. ssh/authorized_keys on all machines where the user wishes to log in using public key authentication.

Why is SSH key not working?

Make sure the authorized_keys file and the private key itself have the correct permissions and ownership. Check that key-based authentication is allowed by the server. Make sure the private key is readable by the SSH client. If you're using PuTTY, make sure your SSH keys are properly configured for the session.

What is the default ssh-keygen?

The default is "rsa". Displays ssh-keygen version information. Extracts the public key from the specified X. 509 certificate file.

Can I use SSH on Ubuntu?

By default, Ubuntu Core runs an OpenSSH server to enable secure remote connections to the device. Rather than requiring a password, the server is instead configured to authenticate connections with a public SSH key linked to the Ubuntu One account used to configure the device.

Do SSH keys expire?

SSH keys have an optional expiration date. This expiration is NOT enforced by default.

What if I lose my SSH key?

If you lose your SSH key passphrase, there's no way to recover it. You'll need to generate a brand new SSH keypair or switch to HTTPS cloning so you can use a personal access token instead. If you lose your SSH key passphrase, there's no way to recover it.