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From: Lawrence D'Oliveiro <ldo@nz.invalid>
Newsgroups: comp.os.linux.advocacy
Subject: Re: Building Linux in /dev/shm
Date: Mon, 22 Apr 2024 07:38:16 -0000 (UTC)
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On Mon, 22 Apr 2024 02:03:57 -0000 (UTC), vallor wrote:

> ssh-agent's socket lives in a subdirectory in /tmp.  Really should live
> in /run somewhere.  Looks like it can be steered by changing the TMPDIR
> environment variable...

The logical place for per-user stuff would be /run/user/«userid», as per 
systemd conventions.

> On our companies user-access shell server, each user has their own /tmp
> in their own chroot.

I once had to set up a file-access server for a client that had to support 
both old-style insecure FTP and also SFTP (with the ultimate aim, of 
course, of transitioning all their customers from the former to the 
latter). Setting up a per-user chroot that would work with both was ... 
quite a challenge ...