Nowadays you run such apps as containers with docker or podman. Did you already look into that?
In my case, selinux and podman (on fedora) take care of the user settings.
this post was submitted on 26 Mar 2024
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Running everything under a single user is possible, but it also means an issue with a single app could wipe everything. It's better practice to add each user to a media group, and set *arr and qbittorrent to use this group and allow write permissions for users in the same group (e.g. 775 instead of 755). This means all users (plex, qbit, *arr) in the group media can access and modify files owned by media (or use the GID).
That would still let one app wipe everything.
You're right, media could still be wiped. Other data owned by users would be protected (e.g. configs).
That makes sense. Thank you so much. That is a question that has caused me issues for a long time. Now I understand it.
This is the all-in-one guide and setup for the arr stack, it's highly advisable to follow it; https://trash-guides.info/
Thanks. I did check Trash guides before posting but it doesn't cover installation, much less Linux user naming and groups, unless I missed it.
Must admit, I had not checked for other installations other than what I needed it for, which was Unraid. However, it does cover docker - which is what is definitely most recommended for running these apps, as pointed out by other comments here.