I need some help here.
#OpenSuse has a configuration option to allow sudo with an empty password, and I want to replicate that on #Kubuntu.
What I‘ve gathered so far:
- sudo.conf: Nothing
- /etc/sudoers: _No_ `nopasswd`, and no „Options targetpw“
- /etc/pam.d/common-auth: pam-unix.so nullok try_first_pass
But, these have no effect on a user in the sudo-group and an empty password is still rejected - pkexec however works.

#Linux

@AliveDevil I don't know if Kubuntu even uses it, but did you check the selinux logs?
@arminhausf
Weren‘t Debian-derived distros AppArmor based, or was the other way round and RHEL is AppArmor? … will check the logs.