不能管道进入差异？

Question

我想聪明一点，将远程文件与本地文件进行比较，而无需先手动下载它。我可以通过以下方式获取远程文件的内容

ssh user@remote-host "cat path/file.name"

然而，管道到 diff

ssh user@remote-host "cat path/file.name" | diff path/file.name

给我这个：

diff: missing operand after `path/file.nae'
diff: Try `diff --help' for more information.

我设置了 ssh 密钥，所以它不会提示我输入密码。对此有什么解决方法？

Answer 1

使用 -代表标准输入：

ssh user@remote-host "cat path/file.name" | diff path/file.name -

Answer 2

这是一种解决方法：diff似乎接受 <( expr ) 作为争论：

diff <(ssh \"cat path/file.name/") <(cat path/file.name)