The openssh-client package on Debian 12 bookworm will rename the group "ssh" to "_ssh" on upgrade. Beware of locking yourself out if you use something like "AllowGroups ssh" in your /etc/ssh/sshd_config. Apparently this group is not meant for this purpose.

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=990456

https://salsa.debian.org/ssh-team/openssh/-/compare/32717238e7587949cb2799136fd15d6fcea5341c...0209c90c6ae5dbb49b0e22a736799accbf9f19d8?from_project_id=6522&straight=false

#Debian #bookworm #openssh #sysadmin