ssh_custom_key

cat >> ~/.ssh/config << EOF
# YOURDOMAIN Section
Host *.yourdomain
    IdentityFile ~/.ssh/yourdomain.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
# End of YOURDOMAIN 
EOF