Bradley M. Kuhn wrote: > I wrote, less than an hour ago: > > Yet, I'm still getting — on every `apt install <SOMETHING>` and `apt update` > > command — the following error: > > Warning: Download is performed unsandboxed as root as file > > '/var/lib/apt/lists/partial/deb.debian.org_debian_dists_trixie_InRelease' > > couldn't be accessed by user '_apt'. - pkgAcquire::Run (13: Permission > > denied) > > … I've missed this more than once, so feel silly but the problem was the > permissions on the chroot directory not having read&execute for everyone. > > So, it was resolved with … > # chmod 755 /srv/chroot/trixie > … run on the main system and not the chroot.
The debian-user list is happy to serve as your debugging duck. https://en.wikipedia.org/wiki/Rubber_duck_debugging

