This How to is a result from the discussion at https://forums.opensuse.org/showthread.php/523674-Network-interfaces-names-displayeed-between-issue-text-and-login-prompt.
In short, from a certain version of Tumbleweed and most probably emerging some where in Leap in the future, there is information about the network interface used and it’s IP address displayed above the login prompt on a terminal login.
Please, anybody that wants to discuss the benefits of this feature, do so in the thread linked to above. This here is only a technical explanation on how to reverse the change in order to make it again possible to have either the old message or some of ones own design (the latter is often done by companies that want to display usages rules of their systems before login).
The message that is displayed is the content of /etc/issue. Example: on openSUSE 13.1:
henk@boven:~> cat /etc/issue
Welcome to openSUSE 13.1 "Bottle" - Kernel \r (\l).
henk@boven:~>
which results in:
Welcome to openSUSE 13.1 "Bottle" - Kernel 3.12.67-64-desktop (tty1).
boven login:
The change involves a more dynamical creation of /etc/issue to add the Network information as applicable at that moment in time and thus will overwrite /etc/issue on network connection.
As the dynamic information is stored in a file and /etc/issue is a symbolic link to that file, to undo this one can remove the link and then restore a fresh /etc/issue:
# rm /etc/issue #as this is a symlink
# cp /run/issue /etc/issue # now you have a template file
After this editing /etc/issue to ones liking can be done.