https://www.cnblogs.com/machangwei-8/p/10352759.html
https://www.cnblogs.com/jiangwenwen1/p/10425159.html
基本格式:scp local_file remote_username@remote_ip:remote_folder
scp [email protected]:/home/test.txt . //从指定机器的目录下载文件 到本地当前所在目录
scp test.txt [email protected]:/home //上传文件 至指定机器目录
scp -r [email protected]:/home/test . //下载目录
scp -r test [email protected]:/home //上传目录