Clean up disk space - Ubuntu

clean.sh

# Show top 10 biggest subdirs in the current dir.
du -sk * | sort -nr | head -10

# Check if you have old kernels for deletion
ls -lh /boot

# Cleaning packages
sudo apt-get autoremove
sudo apt-get autoclean

# View list of all installed packages, sorted by size. If you see something big and don't use it - uninstall it
dpkg-query -W --showformat='${Installed-Size} ${Package}\n' | sort -nr | less

# Check content of /var/tmp/
du -sh /var/tmp/

# Check deborphan
man deborphan

# Search for large files
find / -type f -size +1024k

# or

find / -size +50000  -exec ls -lahg {} \;