For this reason, it’s always recommended to run commands as a sudo user. It only takes one wrong command to crash the system. The root user can also break the system, whether intentionally or accidentally – which is why it’s not recommended to log in and run the system as the root user. This includes installing and uninstalling programs, accessing and modifying system files, and customizing the system. The root user is an administrative user with the highest privileges and is not bound by any permission restrictions. One unique user in the Linux system is the root user. If you own a file or a directory, you can pretty much do anything you want with it – you can access it, edit it, rename and even delete it.īut not all users are the same. These permissions determine access rights or privileges that users have on the file. By default, each file in Linux has its own permissions and directories. This oversimplification then leads us to the concept of file permissions and directories.
These entities are represented by a file descriptor which is a unique identifier for a file or other resources such as directories, network sockets, or processes – hence the concept “everything is a file”. It implies that in a Linux system, every single entity is considered a file. The oversimplification simply gives a high-level overview of the Linux architecture. We have directories, symbolic links, processes, pipes, and sockets just to mention a few. This sounds somewhat puzzling since the Linux system comprises various entities and not just files. You probably have heard of the concept “In Linux, everything is a file”.
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