Dear Michel,
Whatś the output of : getenforce
Enforcing
ls -Z /etc/shadow
-r-------- root root system_u:object_r:shadow_t /etc/shadow
After running those commands, I can run passwd without errors (passwd: all authentication tokens updated successfully), but the password won't be changed.
might be an SELinux issue If so, you can do a "restorecon /etc/shadow"
Did it, still can't update the password.
Regards Samuel