In some cases on Linux Mint, Linux Lite, Zorin OS, elementary OS and other Ubuntu based distros, as well as Ubuntu and Debian, you’ll see the error that add-apt-repository command is missing. $ sudo: add-apt-repository: command not found This tutorial [...]
Sticky Bit, SUID and SGID in Linux with Examples
In this article, we explain special permissions that work on files and directories named as Sticky bit, SUID and SGID. The sticky bit works on directories only. If a user wants to create or delete a file/directory in some directory, [...]
How to List Cron Jobs in Linux
For linux to automatically perform tasks that you would otherwise have to perform yourself, such as running scripts and executing specific commands, we use a tool called cron. On Linux systems, the cron utility is the preferred way to automate [...]
How to Get Size of Directory in Linux
In this article, we focus on how you can check the size of Directory on Linux Systems. This we are going to achieve using the command line interface. The command used to retrieve the file sizes is the du command, [...]
How to Rename Files in Linux
Renaming files in Linux is one of the easiest tasks that you can accomplish straight from the command line. There are quite a few ways you can achieve this and in this guide, I will take you through how you [...]
How to Find/Change Ubuntu Default Root Password
Before I explain how to change the default password, its good to know about "Root SuperUser" and "sudo user" in Linux. In any Linux, as also in any Ubuntu version, there is a SuperUser named root, the Windows equivalent of [...]
Ansible Interview Questions & Answers for Devops
In this guide, we're going to look at Ansible Interview Questions & Answers for DevOps Engineers. This is intended to help you prepare for Ansible Devops Interview and also review your skills. Over the past one year, Ansible adoption has been massive. [...]
How to Use Curl Command with Examples [Download Files]
Curl is a wonderful tool available by default in UNIX based systems. It is a command line utility and a library. It is very useful while troubleshooting URL accesses and for downloading files. Curl supports a wide variety of protocols [...]
How to Delete Files and Directories in Linux
You may, in some cases, need to delete directories and files that you do not need to free up space on your hard drive. In this brief tutorial, you will learn how to delete files and directories in Linux. To [...]
How to Read a Filename with Spaces in Linux
It's not very common in Linux to handle filename with spaces but sometimes files copied or mounted from windows would end up with spaces. While it is not recommended to have file names with spaces, let discuss how to manage filename [...]
How to Install Terraform on CentOS 7/Ubuntu 18.04
Terraform is a software which allows you to manage cloud infrastructure resources from code efficiently. You can use Terraform to build, change, and version infrastructure deployed on proprietary cloud providers or your own infrastructure on premises. It supports cloud service [...]
How to Extract tar xz File in Linux
In this brief guide, we will look at how you can compress and extract tar xz tarball files/directories with a .tar.xz file extension in Linux. The xz format is a single-file compression format that is based on the LZMA2 algorithm. It [...]
How to List Services in Linux
In this article, I will show you how to list all running services on Linux. We will also check how to check the status of a service on a systemd system. Let's learn different commands used to list services on Centos/RHEL 7.x. [...]
How to Time a Command in Linux
If you want to be a good Linux administrator, therefore you should know time command. It is used to determine how long a given command takes to run. It is useful for testing the performance of your scripts and commands (ie [...]