SSH login:
ssh -i key.pem user-name@public-dns or ip-address To send a file from Window to remote (like AWS ec2):
scp -i key.pem file.txt user-name@public-dns:~/ To send a directory from Window to remote:
scp -i key.pem -r directory_name user-name@public-dns:~/ To receive a file from remote to Window: