ssh: too many permissions

There are too many permissions for ssh.

Run command: chmod 600 <keys-files>

Could not open a connection to your authentication agent

from here: http://funkaoshi.com/blog/could-not-open-a-connection-to-your-authentication-agent

SSH private-keys are usually stored encrypted on the computers they are stored on. A pass-phrase is used to decrypt them when they are to be used. Since most people use SSH public-private key-pairs to get around typing in passwords all the time, the ssh-agent daemon exists to store decrypted private-keys you plan on using in a given session. The thing most people get tripped up on when using ssh-agent is that what the program outputs, some borne or csh shell commands, needs to be run. It may look like ssh-agent has set some variables for you, but it has in fact done no such thing. If you call ssh-add without processing ssh-agent’s output, it will complain it is unable to open a connection to your authentication agent. The most straightforward way to run ssh-agent on the command line is as follows: eval `ssh-agent`. After doing this, calls to ssh-add should succeed without error.

fabric Remote via SSH

@hosts(EC2_MYSQL_HOST)
def ecMysqlUp():
    env.key_filename = EC2_KEY_FILENAME
    env.user = 'ubuntu'
    print env.host

ssh: too many permissions

слишком много прав тоже плохо, поэтому для ключей ssh пришлось установить chmod 600