You can use scp (Secure Copy).
To copy your car to friends:
scp file_to_copy user@remote.server.fi :/path/to/location
In the other direction:
scp user@remote.server.fi :/path/locatio/file_name file_name
If you need to copy the entire directory, you will need to use a recursive flag, for example:
scp -r directory_to_copy user@remote.server.fi :/path/to/location
source share