create ssh key-gen for ec2 server

# generate public/private keys using ssh-keygen
ssh-keygen -t rsa

# change the permissions of the .pem file so only the root user can read it
chmod 400 amazon-generated-key.pem

# copy the machine to the remote repository
ssh-copy-id -i ~/.ssh/id_rsa.pub amazon-generated-key.pem ec2-user@amazon-instance-public-dns

# or
cat ~/.ssh/id_rsa.pub | ssh -i amazon-generated-key.pem ec2-user@amazon-instance-public-dns "cat >> .ssh/authorized_keys"

# try to connect without the pem
ssh ec2-user@amazon-instance-public-dns

# and push it to remote
git push remote local:master