* What led up to the situation? To keep our installations minimal, we uninstall all packages from our system that we don't explicitly need. As it turns out none of the packages we selected for the given system depends on ca-certificates, so this got uninstalled as well.
* What exactly did you do (or not do) that was effective (or ineffective)? Running apt update (as well as apt install) fails if ca-certificates is not installed * What was the outcome of this action? # apt update Ign:1 https://security.debian.org/debian-security trixie-security InRelease Ign:2 https://deb.debian.org/debian trixie InRelease Ign:3 https://deb.debian.org/debian trixie-updates InRelease Ign:1 https://security.debian.org/debian-security trixie-security InRelease Ign:3 https://deb.debian.org/debian trixie-updates InRelease Ign:2 https://deb.debian.org/debian trixie InRelease Ign:1 https://security.debian.org/debian-security trixie-security InRelease Ign:2 https://deb.debian.org/debian trixie InRelease Ign:3 https://deb.debian.org/debian trixie-updates InRelease Err:1 https://security.debian.org/debian-security trixie-security InRelease SSL connection failed: error:0A000086:SSL routines::certificate verify failed / Success [IP: 2a04:4e42:400::644 443] Err:3 https://deb.debian.org/debian trixie-updates InRelease SSL connection failed: error:0A000086:SSL routines::certificate verify failed / Success [IP: 2a04:4e42:8e::644 443] Err:2 https://deb.debian.org/debian trixie InRelease SSL connection failed: error:0A000086:SSL routines::certificate verify failed / Success [IP: 2a04:4e42:8e::644 443] All packages are up to date. Warning: Failed to fetch https://deb.debian.org/debian/dists/trixie/InRelease SSL connection failed: error:0A000086:SSL routines::certificate verify failed / Success [IP: 2a04:4e42:8e::644 443] Warning: Failed to fetch https://deb.debian.org/debian/dists/trixie-updates/InRelease SSL connection failed: error:0A000086:SSL routines::certificate verify failed / Success [IP: 2a04:4e42:8e::644 443] Warning: Failed to fetch https://security.debian.org/debian-security/dists/trixie-security/InRelease SSL connection failed: error:0A000086:SSL routines::certificate verify failed / Success [IP: 2a04:4e42:400::644 443] Warning: Some index files failed to download. They have been ignored, or old ones used instead.
