I had use ubuntu-tweak until today when I clean up HDD.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjenLaPUf1S2N8wmBUB9Qay2BJtPL1O4DzWPCF9HfT7_B-9F7iFXR-WHS1sKZyDfCVNC0RYhestrsHS4GUoTqmnvjGAr5JIHeoZxUuJ2K1YDoChiRAaVlR8qDTRKjlA_zYeIe3BA_Q9-Q/s320/Screenshot+from+2017-03-30+19-02-26.png)
I find simple apps now, it so light. Name is ubuntu-cleaner.
go to https://launchpad.net/~gerardpuig/+archive/ubuntu/ppa
You must be read contents and understand.
I typed them in the terminal.
# sudo add-apt-repository ppa:gerardpuig/ppa
# sudo apt-get update
# sudo apt-get install ubuntu-cleaner
It is a part of ubuntu-tweak I think so.