Some applications save configuration files and other data in hidden files or folders that aren't visible by default. Fortunately, Linux makes working with hidden files very easy, whether in a GUI ...

Save and close the file. You can verify it’s working by issuing the command ping invoiceplane, which should ping the address 192.168.1.11.

If you're new to Linux, there's a very handy file you'll want to learn about right away. Jack Wallen introduces you to the hosts file and how to add entries to it.

There are several Linux file systems, but should you go with an alternative, and if so, which one? Written by Jack Wallen, Contributing Writer June 5, 2025 at 3:00 a.m. PT photoman/Getty Images ...