Currently, I run the following command to fetch the files to my local system.
Get-SCPFile
-ComputerName $server
-Credential $credential
-RemoteFile ($origin + $target + ".csv")
-LocalFile ($destination + $target + ".csv")
It works as I'd like (although it sucks that I can't copy multiple files by regex and/or wildcard). However, after the operation has been carried out, I'd like to move the remote files to another directory on the remote server so instead of residing in $origin at $server, I want them to be placed in $origin + "/done" at the same server. Today, I have to use PuTTY for that but it would be so much more convenient to do that from PS.
Googling gave me a lot of material but I couldn't make it work. At the moment, I'm not sure if I'm specifying the path incorrectly somehow or if it's not possible to use the plain commands when working against an external, secured, Unix-server.
For copying files, I can't use Copy-Item, hence the function Get-SCPFile. I can imagine that remote moving, renaming and listing the items isn't possible neither for the same reason (whatever that reason is).
This example as well as this one produce error cannot find path despite the value being used for copying the file successfully with the script at the top. I'm pretty sure it's a misleading error message (not being enitrely sure, though).
$file = "\\" + $server + "" + $origin + "" + $target + ".csv"
# \\L234231.vds.afm.se/var/trans/ut/drish/sxx/meta001.csv
Remove-Item $file -force
Many answers (like this) are very simple, which supports my theory that the combination of Unix and secure raise an extra challenge. Perhaps I'm wording the question insufficiently well.
There's also more advanced examples, still not working, just hanging up the window with no error messages. I feel my competence prevents me from estimating the degree of screwuppiness in this approach.
In PowerShell you can create a PowerShell Session (PSSession) from your System remotly on another System (and into another Session on your System but thats details... ) and execute your commands there.
You can create a PSSession with New-PSSession but a lot of cmdlets have a-ComputerName parameter (or something similar) so that they can be executed remotley without creating a PSSession first.
A PSSession can be used with Enter-PSSession to get an interactive Session or with Invoke-Command to execute a ScriptBlock. That way you could test your Remove-Item command directly on the target server. Depending on the setup you might need to use Linux syntax within the remote session.
Here are some more infos about_PSSessions and using it with SSH to connect to Linux