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原文：https://www.cnblogs.com/zohar-fzh/p/14729180.html