Question

44

How can I display my machine's IP address on a TTY login screen?

rated 0 times [ 44] [ 0] / answers: 1 / hits: 35740 / 2 Years ago, sun, november 13, 2022, 2:21:34

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.

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zebrla

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answered 2 Years ago hentor · Accepted Answer

As of Debian 8/jessie you can use the 4 and 6 escape characters to output the IPv4 and IPv6 addresses. So the /etc/issue file:

Debian GNU/Linux 8 

 l



eth0: 4{eth0}

Would output something like the following at the login console:

Debian GNU/Linux 8 myserver tty1



eth0: 192.168.1.100

myserver login:

I imagine Ubuntu would provide similar functionality (at least in newer releases)