Copy file from local to remote
scp file.txt <user>@<server>:/path/to/remote/folder
Copy folder from local to remote
scp -r /path/to/local/folder <user>@<server>:/path/to/remote/folder
Copy folder from local to remote with ssh key
scp -i ~/.ssh/id_rsa.pub -P <port> -r /path/to/local/folder/ <user>@<server>:/path/to/remote/folder