1、从服务器下载文件

scp username@servername:/remote_path/filename ~/local_destination

2、上传本地文件到服务器
scp ~/local_path/local_filename username@servername:/remote_path

3、从服务器下载整个目录
scp -r username@servername:/remote_path/remote_dir/ ~/local_destination

4、上传目录到服务器
scp -r ~/local_dir username@servername:/remote_path/remote_dir