The server I administrate has a dynamic IP address assigned by DHCP, which is inconvenient. When I want to SSH into it, I have to first log in by hand and use
ifconfig to find its current IP address. Thankfully, it lives about two feet from where I sit.
I know how to edit /etc/issue to show different values before the login prompt is delivered to the display, but I'd like to know if it's possible for /etc/issue to display the current IP address of eth0 (re-evaluated at boot time) so that I can see it and then ssh in without having to log in to run ifconfig.