100% agreement. I usually tell people to write a post on backups. Yes, they've been done before. I think I must have 6-8 blog posts and at least that many articles. Why do something that's been done before? Because people still don't do their backups and maybe your post will reach someone that mine won't.

Plus, remember, blogging is different than writing articles. Blogging is about helping you remember what you've done by providing a place to put it into a logical order that you can retrieve later. Also, it provides a place to point employers to show them your ability to learn and document that learning, huge skills for good employers. Don't get hung on whether someone else has written the same blog post before. I almost guarantee, whatever it is, someone else has probably done it. But write it anyway. It's practice writing. It's practice ordering your thoughts. It has value.