ubuntu_vagrant_clean.sh

#!/bin/bash
set -e

# --- Clean Up System Caches, Temporary Files, and Logs ---

# List of packages often found in a default Ubuntu installation that you might not need with XFCE.
# Review and modify this list according to your requirements.
PACKAGES_TO_REMOVE=(
  # Ubuntu/Unity/GNOME related packages  
  gnome-shell
  gnome-session
  unity
  # Office suite, media players, and other utilities  
  thunderbird
  rhythmbox
  totem
  brasero
  firefox
  # Snap support (if you prefer not to use snap packages)
  # snapd
)

echo "Removing unnecessary packages..."

# Purge the listed packages
apt-get purge -y "${PACKAGES_TO_REMOVE[@]}"

echo "Autoremoving dependencies and cleaning up..."
apt-get autoremove -y
apt-get clean

echo "System minimization complete for a lean XFCE desktop environment."

# Clean apt caches
apt-get clean
rm -rf /var/lib/apt/lists/*

# Remove temporary files
rm -rf /tmp/*
rm -rf /var/tmp/*

# Truncate log files
find /var/log -type f -exec truncate -s 0 {} \;

# (Optional) Remove machine-id so a new one is generated on boot
# rm -f /etc/machine-id

# --- Create and Configure Vagrant User ---

# Create the vagrant user if it doesn't exist
if ! id vagrant &>/dev/null; then
  useradd -m -s /bin/bash vagrant
fi

# Setup passwordless sudo for vagrant
echo "vagrant ALL=(ALL) NOPASSWD:ALL" >/etc/sudoers.d/vagrant
chmod 0440 /etc/sudoers.d/vagrant

# --- Install the Default Vagrant SSH Public Key ---

# Create .ssh directory for vagrant user if not exists
mkdir -p /home/vagrant/.ssh
chmod 700 /home/vagrant/.ssh

# Download the default vagrant public key and install it
curl -fsSL https://raw.githubusercontent.com/hashicorp/vagrant/master/keys/vagrant.pub -o /home/vagrant/.ssh/authorized_keys
chmod 600 /home/vagrant/.ssh/authorized_keys
chown -R vagrant:vagrant /home/vagrant/.ssh

echo 'Cleanup bash history'
unset HISTFILE
[ -f /root/.bash_history ] && rm /root/.bash_history
[ -f /home/vagrant/.bash_history ] && rm /home/vagrant/.bash_history
rm -rf /home/vagrant/.cache /home/vagrant/.local /root/.cache /root/.local

echo 'Cleanup log files'
find /var/log -type f | while read f; do echo -ne '' > $f; done

echo Whiteout root
count=`df --sync -kP / | tail -n1  | awk -F ' ' '{print $4}'`
let count--
dd if=/dev/zero of=/tmp/whitespace bs=1024 count=$count
rm /tmp/whitespace

echo "System cleaning completed and Vagrant user configured."