How to Root Your Android Phone with SuperSU and TWRP

If you really want to dig into the Android system, you may find that some apps require root access. Rooting has become less necessary over the years, but it’s still useful if you want to run certain types of apps. Here’s the most widely supported method for rooting your device, and why you might want to.

Is PermitRootLogin Based on the UID or the User Name?

Sometimes it is fun to dig a bit deeper into how things work just to satisfy your curiosity while learning something new, like PermitRootLogin, for example. Does it check the UID or the user name? Today’s SuperUser Q&A post digs in to find the answer to a curious reader’s question.

How to Hide a File or Folder in an Image in Linux

If other people use your Linux PC from time to time, you can hide files and folders from prying eyes. But if they know the obvious way to view hidden files, you can use a more secretive method: compress those files and hide them in an innocent looking image file.

What Does the Percent Sign in Linux Shell Strings Do?

When you are in the process of learning how to fully use the Linux shell, you may find yourself curious about how much you can manipulate strings in order to get the best results. With that in mind, today’s SuperUser Q&A post has the answer to a curious reader’s question.