SSH Keys
SSH Keys are used for password-less authentication. These carry a greater degree of security than password authentication, especially with careful control of your identity files.
Installation
To generate a new SSH key, try:
ssh-keygen -t rsa -b 4096 -C "[email protected]"
Note that standards are always shifting. In the past, Github recommended a 2048 bits long key. Github now recommends the ed25519 algorithm, instead of rsa.
Usage
Server Configuration
Commercial Services
Github and Gitlab both allow SSH key authentication.