If you are a software developer, sooner or later you’ll have to connect to a Linux machine to perform administrative tasks, access remote database servers, or deploy applications, among other things. Getting comfortable using the command-line interface (CLI) is a must if you want to be proficient with Linux. If you are looking into gaining confidence with Linux, here are 9 text-based user interface interactive tools that I found useful and that will help you get comfortable with the Linux CLI.
You can explore these tools using your own Linux machine if you have one, or you can use Docker or a virtual machine to install Linux and play around with it. Even better, you can repurpose an old laptop and use it, for example, as a database server, Git, or CI environment running on Linux if you want.