#!/bin/bash

# Retrieve IP addresses of interfaces
ip_addresses=$(ip -o -4 addr show | awk '(/eth|en|wl|wn|vmpbr0|tun/) {print $2 "," $4 "\r"}' | column -s , -t)
# Get OS Build Info
os_build=$(cat /etc/os-release | grep PRETTY | cut -d "\"" -f 2)
# Put hostname in a variable that probably isn't reserved or anything
host_name=$(hostname)

# Write to /etc/issue
{
    echo $os_build
    echo "Hostname: ${host_name}"
    echo "IP Addresses:"
    echo "$ip_addresses"

} > /etc/issue