scp username@remoteHost:/remote/dir/file.txt /local/dir/
scp -P 22 localfile.txt remoteuser@remoteserver:/remote/folder/
scp host_name:file_server path_local
# Syntax:
scp <source> <destination>
# To copy a file from B to A while logged into B:
scp /path/to/file username@a:/path/to/destination
# To copy a file from B to A while logged into A:
scp username@b:/path/to/file /path/to/destination