One-time setup for git SSH credentials

ubuntu-ssh-setup.sh

# Start ssh-agent at each session if necessary
# Source: https://askubuntu.com/questions/878944/cant-store-passphrase-in-same-session-with-eval-ssh-agent-ssh-add

sudo vim ~/.bashrc

#
# setup ssh-agent
#
#start running ssh-agent if it is not already.
if [ ! 'root' = "${USER}" ]; then
  if ! pgrep ssh-agent &> /dev/null && ! uname -rms | grep Darwin &> /dev/null; then
    eval "$(ssh-agent -t 3600)" > /dev/null
  fi
  if ! uname -rms | grep Darwin &> /dev/null; then
    if [ -z "${SSH_AUTH_SOCK}" -o -z "${SSH_AGENT_PID}" ]; then
        #first time failed so try again.
        SSH_AUTH_SOCK="$(ls -l /tmp/ssh-*/agent.* 2> /dev/null | grep "${USER}" | awk '{print $9}' | tail -n1)"
        SSH_AGENT_PID="$(echo ${SSH_AUTH_SOCK} | cut -d. -f2)"
    fi
    if [ -z "${SSH_AUTH_SOCK}" -o -z "${SSH_AGENT_PID}" ]; then
      SSH_AUTH_SOCK="$(lsof -p "$(pgrep ssh-agent | tr '\n' ',')" | grep "${USER}" | grep -e "ssh-[^/]*/agent\.[0-9]\+$" | tr ' ' '\n' | tail -n1)"
      SSH_AGENT_PID="$(echo ${SSH_AUTH_SOCK} | cut -d. -f2)"
    fi
  fi
  [ -n "${SSH_AUTH_SOCK}" ] && export SSH_AUTH_SOCK
  [ -n "${SSH_AGENT_PID}" ] && export SSH_AGENT_PID
fi

# Add keys to SSH config
sudo vim ~/.ssh/config

Host ssh.dev.azure.com
  User git
  IdentityFile ~/.ssh/private_key

sudo chmod 600 ~/.ssh/config