SSH Cheatsheet

Various techniques for working with SSH.

Generating An Elliptic Curve Key

To generate an elliptic curve key, rather than an RSA, use one of the algorithms like ed25519:

$ ssh-keygen -o -a 256 -t ed25519

Source: Cryptsus

Copying Key To Remote Host

To deploy the public key to a remove host, you could either use the existing method of concatinating the key to ~/.ssh/authorized_keys, or you could use ssh-copy-id:

$ ssh-copy-id user@hostname.example.com

This copies your default identity. To copy an arbitrary key, include the -i switch:

$ ssh-copy-id -i my_key user@hostname.example.com

Source: Stack Overflow