SSH agent init

ssh-agent.md

	SSH_ENV=$HOME/.ssh/environment
	   
	# start the ssh-agent
	function start_agent {
	    echo "Initializing new SSH agent..."
	    # spawn ssh-agent
	    /usr/bin/ssh-agent | sed 's/^echo/#echo/' > "${SSH_ENV}"
	    echo succeeded
	    chmod 600 "${SSH_ENV}"
	    . "${SSH_ENV}" > /dev/null
	    /usr/bin/ssh-add
	}
	   
	if [ -f "${SSH_ENV}" ]; then
	     . "${SSH_ENV}" > /dev/null
	     ps -ef | grep ${SSH_AGENT_PID} | grep ssh-agent$ > /dev/null || {
	        start_agent;
	    }
	else
	    start_agent;
	fi