issue - prelogin message and identification file
The file /etc/issue is a text file which contains a message or system
identification to be printed before the login prompt. It may contain
various @char and \char sequences, if supported by the getty-type
program employed on the system.
motd(5), agetty(8), mingetty(8)
This page is part of release 3.24 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.