The text displayed before the login prompt is stored in /etc/issue (there’s a related file, /etc/motd, that’s displayed after the user logs in, before their shell is started). It’s just a normal text file, but it accepts a bunch of escape sequences:
\b — Baudrate of the current line.
\d — Current date.
\s — System name, the name of the operating system.
\l — Name of the current tty line.
\m — Architecture identifier of the machine, eg. i486
\n — Nodename of the machine, also known as the hostname.
\o — Domainname of the machine.
\r — Release number of the OS, eg. 1.1.9.
\t — Current time.
\u — Number of current users logged in.
\U — The string “1 user” or ” users” where is the number of current users logged in.
\v — Version of the OS, eg. the build-date etc.
My IP address: \4 #funziona
ifconfig eth0 | awk '/inet addr/ {print $2}' | cut -f2 -d: > /etc/issue non va