Automatically load ssh keys : Add to .bashrc and configure environment variable.
export SSH_DIR="${HOME}/.ssh"
command mkdir -p "${SSH_DIR}"
if [[ -z "${SSH_AUTH_SOCK:-}" ]] ; then
eval "$(ssh-agent -s)" >/dev/null 2>&1
export SSH_AUTH_SOCK="${SSH_AUTH_SOCK}"
fi
export SSH_AGENT_LIFE=14400 # 4 hours