Ubuntu cleanup utility to clean common junk and free up space

ubuntu-cleanup-utility.sh

#!/bin/bash

# Script to perform some useful linux cleanup operations
# 1. Download the file
# 2. Make it executable using chmod +x ubuntu-cleanup-utility.sh
# 3. Run command below command
#    sudo ./ubuntu-cleanup-utility.sh 

REMOVE_LOG_OLDER_THEN_DAYS=1
SNAP_DIR=/var/lib/snapd/snaps

# Remove packages no longer required
function removeUnnecessaryPackages() {
    apt-get autoremove
}

# Clean up APT cache
function cleanAPTCache() {
    apt-get clean
}

# Clean system logs
function clearSystemLogs() {
    journalctl --vacuum-time=1$REMOVE_LOG_OLDER_THEN_DAYS
}

# Removes old revisions of snaps
# CLOSE ALL SNAPS BEFORE RUNNING THIS
function clearSnap() {
    set -eu
    snap list --all | awk '/disabled/{print $1, $3}' |
        while read snapname revision; do
            snap remove "$snapname" --revision="$revision"
        done
}

# Clear thumbnail cache
function clearThumbnails() {
    rm -rf ~/.cache/thumbnails/*
}

echo "Removing packages no longer required"
removeUnnecessaryPackages

echo "Cleaning APT cache"
cleanAPTCache

echo "Cleaning system log older then $REMOVE_LOG_OLDER_THEN_DAYS day(s)"
clearSystemLogs

echo "Removing older versions of Snap applications"
echo "Snaps size before cleaning"
du -h $SNAP_DIR
clearSnap
echo "Snap size after cleanup"
du -h $SNAP_DIR

echo "Cleaning thumbnails"
clearThumbnails

echo "Done"