Proxmox Ubuntu VM Setup

init.sh

#!/bin/zsh

set -e

if [ "$EUID" -ne 0 ]; then
  echo "Please run this script as root or using sudo."
  exit 1
fi

# Questions

short_hostname=""
while [[ -z "$short_hostname" ]]; do
    vared -p "What is the shorthand hostname of this machine (e.g., 'titan')? " -c short_hostname
done

vared -p "What is the FQDN hostname of this machine (e.g., 'titan.jonasfrey.eu')? [default: ${short_hostname}.jonasfrey.eu] " -c fqdn_hostname
if [[ -z "$fqdn_hostname" ]]; then
    fqdn_hostname="${short_hostname}.jonasfrey.eu"
fi

# Configuration

echo "Configuring hostname '${short_hostname}'..."
sed -i "s/127.0.1.1 .*/127.0.1.1 $fqdn_hostname $short_hostname/g" /etc/hosts
sed -i "s/templatehost.jonasfrey.eu/$fqdn_hostname/g" /etc/postfix/main.cf
sed -i "s/templatehost/$short_hostname/g" /etc/postfix/main.cf
echo "$short_hostname" > /etc/hostname
echo "$fqdn_hostname" > /etc/mailname

echo "Re-generating machine-id..."
rm -f /etc/machine-id
dbus-uuidgen --ensure=/etc/machine-id

echo "Changing user password..."
passwd jonas

# Cleanup

function ask {
  vared -p "$* [Yn] " -c yn
    if [[ -z "$yn" ]]; then
        return 0
    fi
    case $yn in
      ([Yy]*) return 0 ;;
      ([Nn]*) return 1 ;;
    esac
}
ask "Remove script?"
if [[ $? ]]; then
    echo "Removing script..."
    rm -f "$0"
fi

ask "Reboot now?"
if [[ $? ]]; then
    echo "Rebooting..."
    reboot
fi