ssh_automatic_key.sh

chmod 400 ~/.ssh/field.pem
 
cat >> ~/.ssh/config << EOF
Host *.field.xxxx.com
    IdentityFile ~/.ssh/field.pem
    CheckHostIP=no
    StrictHostKeyChecking=no
    User centos
    UserKnownHostsFile=/dev/null
    ## Automatically restore a connection if reconnected within 5 minutes (in case the VPN drops)
    TCPKeepAlive no
    ServerAliveInterval 60
    ServerAliveCountMax 5
    ## reuses the ssh connection making things much faster
    ControlMaster auto
    ControlPath /tmp/.ssh_%h_%p_%r
    ControlPersist 600
EOF