Often times there is a little thing that you would like to figure out how to do it and because it is little you tend to delay trying to figure out due to your busy schedule.
An example of this little thing is figuring out how to associate an application to a file based on file type on Ubuntu. In my case is PDF files. By default “Document Viewer” is used to display the content of a PDF file and it works, but I prefer to use Acrobat Reader. Of course the solution is already out there if you search for it, but what I am amazed at is people are really happy when they found that solution and I know this because of their thank you notes.
Following the DRY principle, here is the link to the solution that I found.