Unix is a multi-user, multi-tasking operating system that was initially developed by Bell Labs in the 1970s. Various similar operating systems that are POSIX compliant (ie compatible with Unix) have since been developed (POSIX is an abbreviation for Portable Operating System Interface for UNIX). These include the following: the BSD family (OpenBSD, FreeBSD, NetBSD, Mac OS/X), Solaris, IRIX, AIX, SunOS, UnixWare, OpenServer and Linux.
Software written for POSIX compliant operating systems is generally able to be compiled for all POSIX platforms with little or no platform-specific changes. This makes the commands and utilities available for this extended family of operating systems very similar, and there are few differences between administering them.
The articles in this section are about useful command line utilities and commonly used application software on POSIX compliant operating systems. For Mac OSX specific articles see my OSX section.
Working with Git allows you to better manage projects with your team. However, you could encounter incidents when you accidentally name branches mistakenly. That’s totally forgivable. To fix this concern, we’ll explain the step by step procedures to rename local and remote git branches. We’ll throw in instructions on how to delete a branch git …
The chown command is useful for making changes to the user or group ownership of a certain file, directory, or symbolic link. Every file is associated with a file owner or a group. This grants the file or group owner permission access rights to edit, modify, and make changes to the file. If you aren’t …
Are you working with shell scripting and Bash? This article is for you. At some point in your work, you’ll need to check your file system. Is your directory still there? Not sure if your file exists anymore? These are the two essential questions you’ll need to know. How do you know if your directory …
In this tutorial, I’ll show you how to perform a Linux shutdown command step-by-step along with how to safely reboot your system. Before We Get Started… Let’s take a refresher course. After all, in any task or work we do, proper fundamentals and foundation is key to delivering the best output. The basic syntax, as …
If you’ve had issues running a command on Linux only to be granted “Access Denied,” you’ve come to the right place. This is where the Sudo command comes in. It’s the all-powerful magic word you can use that grants you the “power” to carry certain tasks, which would otherwise be limited or restricted to the …
Before we get started, here’s what you can gain after reading this article: What is Linux and how does it work What are the benefits of using Linux How is Linux different from Windows and Mac OS Who is Linux for A Brief Overview What is a Linux operating system? For starters, Linux is an …