Benjamin O'Donald

What is the Linux tr command? The tr command in Linux is an excellent tool which can be used for text manipulation of specific characters within text files. With this tool you are able to translate strings of characters from standard input (also known as stdin) and it will write that translation into standard output […]

What is R? R is a popular statistical computing programming language commonly used by data scientists and software developers to manipulate data in various use cases. With the use of R you are able to execute various tasks such as statistical calculations of data, data visualization through graphical sets or even hypothesis testing. Another excellent […]

What is the less command in Linux? Ever heard the expression “less is more”? Well today we’ll be going over the less command in Linux which is very similar to another command called “more”. Less is a Linux command line tool available on all Linux operating systems and it allows you to page/search through log […]

What is the PWD command in Linux? There are various situations when you may need to know the exact path of your present working directory. The PWD command in Linux is useful in many cases and it will show you the full path to your current working directory or “present working directory” which is what […]

What is a bash For Loop? As a Linux System Administrator there will come times where a task can be made much simpler and faster to complete with the use of For Loops in bash. A bash For Loop is a script or statement where you have a set of items (i.e a list of […]

What is the .bashrc file? Whenever a bash shell session starts it will reference bash configuration files such as .bashrc or .bash_profile and will load a user into their initial command prompt based off scripts placed in those files. With the .bashrc file you’re able to customize aspects of a users bash sessions by adding […]

Linux Administrators at times will need to open multiple terminal sessions while logged into a server in order to multi-task between different projects/tasks. Many Linux users are familiar with the ‘screen’ command line utility to accomplish this but in newer versions of RHEL and other distributions we are seeing Tmux becoming more popular in the […]

What is the kernel ring buffer? The Linux kernel is the “brain” and core piece of the Linux operating system and the kernel’s main function is to serve as an interface between the hardware and software components of a Linux computer system. During the boot cycle of a Linux system various information is displayed within […]

What is the Linux kernel? The kernel is the “brain” and core piece of the Linux operating system and the kernel’s functionality is to serve as an interface for interaction between system software and hardware. Linux kernel updates are released periodically to improve security, fix issues discovered in a previous release, provide new features, and […]