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this post was submitted on 03 Oct 2025
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"Hey Linux, can you just delete this file please?"
"Sure thing bud, a program is using it, it's ok, I will just unlink the inode anyway, the program can still access it until it closes the file"
This is honestly one of my favorite features of the linux filesystem. As a dev it makes things like replacing and hot-reloading plugins way easier.
It turns out you can kind of get the same functionality on Windows if you rename the open file and place the new one with the original name, but it's a bit of a hack.
Windows won't let you rename a file that's being used either.
Yeah, super annoying. In Linux you can rename or move it and the app using it doesn't care.
Although having the option of listing the app using a file so I can kill the app would also be really nice to have. I'm sure Linux has something for that too, but I don't know what it is.
fuser
I can't remember the other program that'll do it.
But there's another one that'll list all the processes using a file.
Tip of my tongue fuck.
lsof | grep
That's the one
You can use PowerToys on windows to see what app is using a particular file
That's actually a thing, but I'm not entirely sure in which cases. Probably only for services and not apps, but I've done that myself where deleting a file was impossible, but renaming it and deleting it worked.
Maybe it's only possible in certain cases, but I can tell you for certain it's possible with running exe's and loaded dll's. I have a CMake step on Windows that does this rename hack so my builds don't fail if I still have the app running.