He's copying a file named 17-6-21 onto a thumb drive.

他把一个名叫17-6-21的文件拷到了优盘上。

We will probably want to copy files.

我们可能想要复制文件。

For example, SCP will try to copy files that are already there.

例如，SCP 将尝试复制已经存在的文件。

SCP will start from the very beginning, trying to copy every file, whereas RSYNC will continue from where it stopped.

SCP 将从头开始，尝试复制每个文件，而 RSYNC 将从停止处继续。

And here we can specify that we want to copy this local file called notes and the syntax is kind of similar.

在这里我们可以指定我们要复制这个名为 Notes 的本地文件，语法有点相似。

For example, here just by specifying these three flags, I'm telling RSYNC to kind of preserve all the permissions whenever possible to try to check if the file has already been copied.

例如，在这里仅通过指定这三个标志，我告诉 RSYNC 尽可能保留所有权限，以尝试检查文件是否已被复制。