Configure SSH Keys

How to Set Up SSH Keys on Ubuntu

Access the VPS from your machine

Generate a new SSH key on your computer:

ssh-keygen -t rsa -b 4096 -C "your_email@example.com" -f ~/.ssh/id_rsa_myserver

Start the ssh-agent and copy the key to the server:

eval "$(ssh-agent -s)"
ssh-copy-id -i ~/.ssh/id_rsa_myserver sammy@your-server-ip

Test access with the new key:

ssh -i ~/.ssh/id_rsa_myserver sammy@your-server-ip

Access GitHub from the VPS

Generate a new SSH key on the server:

ssh-keygen -t ed25519 -C "your_email@example.com" -f ~/.ssh/id_ed25519_github

Create an SSH config file:

echo "
# GitHub.com
Host github.com
  AddKeysToAgent yes
  IdentityFile ~/.ssh/id_ed25519_github
" > ~/.ssh/config

Print the public key and add it to GitHub under Settings → SSH and GPG keys:

cat ~/.ssh/id_ed25519_github.pub

Test the connection:

ssh -T git@github.com