This is because my /boot partition has caught up with unwanted old kernels, packages etc.
### Answer: ###
I heard about **Computer Janitor** feature which will remove unwanted old junk files in Ubuntu Tweak tool. Using the Computer Janitor, you can clean up your system like a freshly installed system. Janitor will remove;
- Apps cache(Firefox/Chrome cache, Software center cache);
- Thumbnail cache;
- Apt cache;
- Old kernels;
- Package configs;
- And unneeded packages.
If you haven’t install this tool, look at the following link.
- **[How To Install And Use Ubuntu Tweak On Ubuntu][1]**
To remove unwanted junk files, open Ubuntu Tweak, and click on the **Janitor** option.
That’s all. Enjoy. There are others ways also available to clean up the system. But, this seems very easy to follow. We can do system clean up in few mouse clicks.
