Backup-installed-packages

pbackup.sh

#!/bin/bash
# Usage:
# chmod +x pbackup.sh
# ./pbackup.sh

DISTRO=$(lsb_release -sc)
DATE=$(date +%Y-%m-%d)

# Clean up the system.
if [ $DISTRO == jammy ]; then
sudo apt autoremove --purge
fi

# Backup list of installed DEB packages.
echo
apt-cache dumpavail >/tmp/apt-avail
sudo dpkg --merge-avail /tmp/apt-avail
rm /tmp/apt-avail
dpkg --get-selections >$HOME/installed_pkgs_$DATE.log
echo

# Backup list of available repositories.
if [ $DISTRO == jammy ]; then
grep -Erh ^deb /etc/apt/sources.list* >$HOME/available_repos_$DATE.txt
fi

# Backup list of installed snap packages.
snap list --all >$HOME/installed_snaps_$DATE.txt

# Backup list of manually installed DEB packages.
if [ $DISTRO == jammy ]; then
  echo $(comm -23 <(apt-mark showmanual |
    sort -u) <(gzip -dc /var/log/installer/initial-status.gz |
      sed -n 's/^Package: //p' | sort -u)) >$HOME/manually_installed_pkgs_$DATE.txt
else
  apt-mark showmanual >$HOME/manually_installed_pkgs_$DATE.txt
fi

# Backup list of installed packages covered by the Expanded Security Maintenance updates.
if [ $DISTRO == jammy ]; then
  if /usr/bin/pro security-status --format json |
    sed -n '/"This machine is attached to an Ubuntu Pro subscription."/p'; then
    /usr/bin/pro security-status --esm-apps 2>/dev/null >$HOME/pro_security_pkgs_$DATE.txt
  fi
fi

echo "Way to go!"