scp /path/to/local/file username@remote_host:/path/to/remote/directory
scp username@remote_host:/path/to/remote/file /path/to/local/directory
scp username@remote_host1:/path/to/remote/file username@remote_host2:/path/to/remote/directory
scp -P port_number /path/to/local/file username@remote_host:/path/to/remote/directory
scp -r /path/to/local/directory username@remote_host:/path/to/remote/directory