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.
Learning how you can create a file in Linux is an essential skill to have, especially if you’re using Linux regularly. There are various ways and commands you can use to create a file in Linux. If you’re worried about the learning curve, don’t be. To create a file in Linux is a straightforward process, …
Does your code require repetitive tasks in your Linux or UNIX operating system? A “for loop” statement allows particular commands done continuously until a condition is met, or it becomes “false.” This programming language statement is an iteration of the loop within the bash script, thus its name, “bash for loop.” This is particularly useful …
Are you planning to rename files? Linux allows you to do that! If you’re using a Linux system, you’ve probably already tried renaming most, or at least some, of your files. After all, it’s one of the primary tasks you can do! You can either rename a file in Linux using its command-line terminal or …
If it’s your first time using Ubuntu, we highly recommend checking Ubuntu version updates and releases before diving into the system. Learning how to check Ubuntu version system updates is vital when you want to install additional programs or troubleshoot issues occurring in your system. If you’re running an outdated Ubuntu version, you could be …
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 …
