Basic ed25519 SSH with keychain setup

ssh-setup.sh

#!/usr/bin/env bash

#
# DESC: Setup personal github account
#

## Define github user email
email='your@email.com'

## Generate SSH key pairs
ssh-keygen -t ed25519 -C "$email"

## Create ~/.ssh/.config file to persist SSH pass
cat <<EOF | tee -a ~/.ssh/config
Host *
AddKeysToAgent yes
UseKeychain yes
IdentityFile ~/.ssh/id_ed25519
EOF

## Install ssh keychain
sudo apt install keychain -y

## Add your SSH private key to the ssh-agent 
## and store your passphrase in the keychain
ssh-add -K ~/.ssh/id_ed25519

## Start ssh agent
eval "$(ssh-agent -s)"

## Add your SSH private key to the ssh-agent. 
## If you created your key with a different name, 
## or if you are adding an existing key that has a 
## different name, replace id_ed25519 in the command 
## with the name of your private key file.
ssh-add ~/.ssh/id_ed25519

## Add the SSH key to your account on GitHub. For more information, 
## see "Adding a new SSH key to your GitHub account."