ssh key

Generating an ssh-key pair

Generating SSH-key pair (the standard for open-ssh i the EdDSA25519 scheme)

ssh-keygen -t ed25519 -C "[email protected]"

or

ssh-keygen -t rsa -b 4096 -C "[email protected]"

to use RSA encryption protocol with a key of 4096 bits. A prompt will ask you about the desired location for the ssh key to be stored:

Enter file in which to save the key (/home/your_username/.ssh/id_ed25519):

If you’ve properly set those up and chose path-to-key/, the command

ls path-to-key

should output

id_ed25519     id_ed25519.pub

Adding the key to the machine agent

Start ssh agent

eval "$(ssh-agent -s)"

Add the private key to the agent

ssh-add path-to-key/id_ed25519

Copy the public key:

cat path-to-key/id_ed25519.pub

and paste it to GitHub/SourceHut.

Global ssh key configuration

In order to keep two different ssh keys for two source code hosts (Github and sourcehut) .ssh/config:

# GitHub configuration
Host github.com
    HostName github.com
    User git
    IdentityFile ~/.ssh/id_ed25519_github
 
# SourceHut configuration
Host sr.ht
    HostName sr.ht
    User git
    IdentityFile ~/.ssh/id_ed25519_sourcehut
    IdentitiesOnly yes