scp -rp user1@host1:/filepath1 user2@host2:/filepath2
-p Preserves modification times, access times, and modes from the original file.
备份模式（修改时间、访问时间及modes）
-r Recursively copy entire directories.
递归地复制整个目录
scp -rp user1@host1:/filepath1 user2@host2:/filepath2
-p Preserves modification times, access times, and modes from the original file.
备份模式（修改时间、访问时间及modes）
-r Recursively copy entire directories.
递归地复制整个目录