Install BleachBit in Ubuntu
Download the .deb package from here or use the following command
Now you have bleachbit_0.2.0-1_all_ubuntu810.deb package.Install this .deb package using the following command
sudo dpkg -i bleachbit_0.2.0-1_all_ubuntu810.deb
This will complete the installation.
You download this .deb file in your desktop and double click to install.
If you want to open go to Applications--->Accessories--->BleachBit
Once you open first time you should see similar to the following screen click yes
Now you can see BleachBit screen as follows
Now you need to select which files you want to clean from left hand menu
Confirm your delection
Your selected files deleted