ssh , Conceptual query: Is the file in use transferred to the local machine in SSH?


Conceptual query: Is the file in use transferred to the local machine in SSH?

Question:

Tag: ssh

I work on a remote machine terminal through ssh (from the local machine) to run a program which uses, as input, a file of size nearly 1GB.

My question is, when this program is run over ssh, is the file transferred to my local machine in any way? Or is it directly taken from the remote machine and the local machine is not at all involved other that showing the output?


Answer:

When you use ssh, you run a command remotely, on the target system.

It doesn't transfer anything unless you ask it to - but it does (by default) return you the output of that command.

So if you ssh [email protected] grep someword somefile then it'll process the file on somehost and just give you the matches. That might end up being the whole file, but it probably won't be.


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