how to access ec2 better?
- alias pem file and command
 
    # AWS related
    export AWS='ec2-52-77-227-119.ap-southeast-1.compute.amazonaws.com'
    export PEM='/Users/tanchao/workspace/credentials/thursday-ec2-t2micro.pem'
    alias sshaws='ssh -i $PEM ec2-user@$AWS'
    alias scpaws='scp -i /Users/tanchao/workspace/credentials/aws9517.pem'
- define ssh config mac way (recommand)
 
    host aws
        HostName ec2-52-77-227-119.ap-southeast-1.compute.amazonaws.com
        Port 22
        User ec2-user
        IdentityFile /Users/tanchao/workspace/credentials/thursday-ec2-t2micro.pem
- we host a git repo on ec2 and i need checkout without login/pem file
 
    git clone ssh://aws/~/gitrepo/recruiter-webapp