my ssh-agent... save script and call it in .bashrc

#!/bin/bash
# Author: Peter Maloney

# loads gpg-agent automatically if it is not already running
# gpg-agent, one agent per user
if [ -e ~/.ssh/pm-ssh-agent ]; then
    #echo "loading pm-ssh-agent"
    . ~/.ssh/pm-ssh-agent > /dev/null 2>&1

    if ps -p "${SSH_AGENT_PID}" --no-headers -o pid,uid,comm | awk -v uid=$(id -u) '$2 == uid && $3 == "ssh-agent" {exit 1}'; then
        #echo "loading ssh-agent"
        ssh-agent > ~/.ssh/pm-ssh-agent
        . ~/.ssh/pm-ssh-agent > /dev/null 2>&1
    fi
else
    #echo "loading ssh-agent"
    ssh-agent > ~/.ssh/pm-ssh-agent
    . ~/.ssh/pm-ssh-agent > /dev/null 2>&1
fi