scp source target
scp root@source_server:/app/file1.txt /backup
scp file1.txt root@target_server:/app
scp root@source_server:/app/file1.txt root@target_server:/app
$ scp myfile.txt remoteuser@remoteserver:/remote/folder/
$ scp remoteuser@remoteserver:/remote/folder/remotefile.txt localfile.txt