Are file comments possible?

[Moltke]

All file types. Basically, on a Mac you can append a note to any file via the file comments. I often used these for adding descriptions of equipment setups on recordings, for example, but they have many applications. I don't think you can do this with Linux, I just thought I should ask while I was wondering. It takes two clicks and some typing; it's very easy.

The Mac system is not perfect, though; the comments can be lost if you have a bad system crash; they are stored in the file's icon, I believe, and if it gets corrupted, so does the comment.

You mean something like this? http://www.mactips.info/2009/07/add-and-...e-comments If I understand that correctly, in Mac you can append a note to a file by opening the file manager, selecting the file, righ-clicking on it, select get info from the context menu and then add your comment, did I get that right? Well, AFAIK in thunar that's not possible, however, KDE's dolphin manager does provide that feature https://userbase.kde.org/Dolphin/File_Management so yes, you can do that in Linux too just not in every distro/DE it seems. If you need that feature, there are two tools, that I'm aware of, that might be worth taking a look at;
TMSU https://tmsu.org/

a tool for tagging your files. It provides a simple command-line tool for applying tags and a virtual filesystem so that you can get a tag-based view of your files from within any other program.

 
TagSpaces https://www.tagspaces.org/ 

an offline, open source, file manager. It helps organizing your files and folders with tags and colors. You can add a custom thumbnail and text description to every file or folder. You can create and edit notes in plain text, markdown or HTML file formats.