On Wed 02 Mar 2022 at 14:28:07 (+0000), Andy Smith wrote: > On Wed, Mar 02, 2022 at 07:54:53AM -0500, Greg Wooledge wrote: > > Someone who knows systemd, dbus, and all that stuff might be able to > > suggest next steps. > > I'm not really that person but yes, logind removes things from > /dev/shm for a user if it's not a system user, when that user's > session ends. Which has caused even greater confusion than this, > before: > > https://github.com/systemd/systemd/issues/4532 > > In terms of avoiding this affecting OP, firstly normal users > probably shouldn't be using /dev/shm for routine storage. I would > suggest /tmp, /var/tmp or /run/user/$UID/.
AIUI though, the first two are backed by real disks on Debian (by default), and using the last one to share objects means having to fiddle with permissions because each $UID has exclusive access to their own subdirectory. (The OP involved two users.) (The reason I use /dev/shm myself is that it's B I G. But I don't suffer from the issue under discussion because I'm logged in.) Cheers, David.
