packer-cn/examples/hcl/linux/etc/scripts/100-cleanup.sh

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#!/bin/sh -eux
# Delete all Linux headers
dpkg --list \
| awk '{ print $2 }' \
| grep 'linux-headers' \
| xargs apt-get -y purge;
# Remove specific Linux kernels, such as linux-image-3.11.0-15-generic but
# keeps the current kernel and does not touch the virtual packages,
# e.g. 'linux-image-generic', etc.
dpkg --list \
| awk '{ print $2 }' \
| grep 'linux-image-.*-generic' \
| grep -v `uname -r` \
| xargs apt-get -y purge;
# Delete Linux source
dpkg --list \
| awk '{ print $2 }' \
| grep linux-source \
| xargs apt-get -y purge;
# Delete development packages
dpkg --list \
| awk '{ print $2 }' \
| grep -- '-dev$' \
| xargs apt-get -y purge;
# delete docs packages
dpkg --list \
| awk '{ print $2 }' \
| grep -- '-doc$' \
| xargs apt-get -y purge;
# Delete X11 libraries
apt-get -y purge libx11-data xauth libxmuu1 libxcb1 libx11-6 libxext6;
# Delete obsolete networking
apt-get -y purge ppp pppconfig pppoeconf;
# Delete oddities
apt-get -y purge popularity-contest installation-report command-not-found friendly-recovery bash-completion fonts-ubuntu-font-family-console laptop-detect;
# 19.10+ don't have this package so fail gracefully
apt-get -y purge command-not-found-data || true;
# Exlude the files we don't need w/o uninstalling linux-firmware
echo "==> Setup dpkg excludes for linux-firmware"
cat <<_EOF_ | cat >> /etc/dpkg/dpkg.cfg.d/excludes
#BENTO-BEGIN
path-exclude=/lib/firmware/*
path-exclude=/usr/share/doc/linux-firmware/*
#BENTO-END
_EOF_
# Delete the massive firmware packages
rm -rf /lib/firmware/*
rm -rf /usr/share/doc/linux-firmware/*
apt-get -y autoremove;
apt-get -y clean;
# Remove docs
rm -rf /usr/share/doc/*
# Remove caches
find /var/cache -type f -exec rm -rf {} \;
# truncate any logs that have built up during the install
find /var/log -type f -exec truncate --size=0 {} \;
# Blank netplan machine-id (DUID) so machines get unique ID generated on boot.
truncate -s 0 /etc/machine-id
# remove the contents of /tmp and /var/tmp
rm -rf /tmp/* /var/tmp/*
# clear the history so our install isn't there
export HISTSIZE=0
rm -f /root/.wget-hsts