The coming January of February a friend of mine wants from me to administrate a Linux server with database on it but IDK how to do that. He too knows IDK how but he insist. So my only option is to find a free course on SQL databases for me to exercise at home on my computer. Do you know of anything like this? Once upon a time there were books and PDFs of books how to work win Windows 98, so I'm looking for something like that but for SQL db in Linux. From what I was told, the managing of the db will happen mostly remotely, meaning through a command line.