#!/bin/sh

set -Eeo pipefail

if (( $EUID != 0 )); then
    echo "Should be run as root"
    exit 1
fi

if [ -z "$1" ]
  then
    echo "Usage: $(basename $0) hostname"
fi

echo $1 > /etc/hostname

cat >> /etc/hosts <<EOF
127.0.0.1   localhost
::1         localhost
127.0.1.1   $1.localdomain   $1
EOF