Here’s How to Remove Old Kernels from Ubuntu 16.04 LTS and Free Disk Space

If you’re a beginner, you start wondering what’s going on, asking questions like “Where’s my disk space disappearing?,” and it matters when you’re running Ubuntu from an SSD, which usually come in smaller sizes than the traditional hard disk drives (HDD), those of 120GB being the most popular ones. There’s a tool out there called purge-old-kernels, and it was created by Canonical’s Dustin Kirkland, which will save you a lot of time and energy.