Is there a directory equivalent of /dev/null in Linux?

roelvanmeer asked:

When configuring an application, you can often use /dev/null as config file if you want the application to read an empty file. But, if the application reads a list of files from a directory, you cannot use this trick. You would need to give it an empty directory to read.

I was wondering: does Linux have a default empty directory that can be used for such purposes? I know OpenSSH used /var/empty for a while, and I can of course create an empty dir myself, but maybe the FHS has specified a standard directory for this?

My answer:

The FHS provides no “standard” empty directory. You can create one yourself, as a subdirectory of /run or /tmp. For this use case, the latter is probably the better fit, though in practice it matters little.

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