Arch Linux Setup Script Part 3

#!/bin/bash

# Part 3 of Arch-Setup.sh Arch Linux Setup Script

# This script, created by James Triantafylos, will install and configure Arch Linux from start to finish.

# Instructions:
# - RUN PART 1 AND 2 OF THIS SCRIPT FIRST
# - Execute this script with ./Arch-Setup-Part3.sh

# Requirments:
# - A wired network connection
# - A disk over 24GB in size
# - UEFI boot capability

# Goto function for BASH
function goto
{
    label=$1
    cmd=$(sed -n "/$label:/{:a;n;p;ba};" $0 | grep -v ':$')
    eval "$cmd"
    exit
}

# Create a non-root user
createUser: 2>&1 >/dev/null
echo "Enter a username for the non-root user account: (Note: Must be all lowercase!)"
read NONROOTUSER
NONROOTUSER=${NONROOTUSER,,}

echo "Are you sure you would like to create the non-root user $NONROOTUSER? (Y = Yes, N = No)"
read USERCREATECONFIRMATION

if [ $USERCREATECONFIRMATION == "Y" ] || [ $USERCREATECONFIRMATION == "y" ]; then
    echo "Creating user $NONROOTUSER..."
else
    goto createUser
fi

useradd -m $NONROOTUSER
echo ""

# Set the non-root users password
echo "Choose your non-root users password:"
echo ""
passwd $NONROOTUSER
echo ""

# Give the non-root user Sudo capabilities
echo "Giving the non-root user Sudo capabilities..."
sed -i -e "\$a$NONROOTUSER ALL=(ALL) NOPASSWD:ALL" /etc/sudoers
echo ""