curl is a powerful command-line tool for transferring data from or to a remote server. With curl you can download or upload data using various network protocols, such as HTTP, HTTPS, SCP, SF… Read More

Elasticsearch is an open-source distributed full-text search and analytics engine. It supports RESTful operations and allows you to store, search, and analyze big volumes of data in real-tim… Read More

Python is one of the most widely used programming languages in the world. With its simple and easy to learn syntax, Python is a popular choice for beginners and experienced developers. Pytho… Read More

Decision making is one of the most fundamental concepts of computer programming. Python supports the common flow control statements found in other languages, with some modifications. The if… Read More

In this article, we will cover the basics of the sequence expression in Bash. The Bash sequence expression generates a range of integers or characters by defining a start and the end point o… Read More

Redis is an open-source in-memory key-value data store. It can be used as a database, cache and, message broker and supports various data structures such as Strings, Hashes, Lists, Sets, and… Read More

This guide explains how to remove a Git remote. Git remote is a pointer that refers to another copy of the repository that is usually hosted on a remote server. Generally, when working with… Read More

Sometimes, when editing a file, you may delete a wrong line or change your mind about an edit, and you’ll want to revert the changes. This article explains how to undo and redo changes… Read More

Apache Maven is an open-source project management and comprehension tool used primarily for Java projects. Maven uses a Project Object Model (POM), which is essentially an XML file containin… Read More

lsmod is a command-line utility that displays information about the loaded Linux kernel modules. Kernel modules The kernel is the core component of an operating system. It manages the system… Read More

Xrdp is an open-source implementation of the Microsoft Remote Desktop Protocol (RDP) that allows you to graphically control a remote system. With RDP, you can log in to the remote machine an… Read More

Python has a few built-in modules that allow you to delete files and directories. This tutorial explains how to delete files and directories using functions from the os, pathlib, and shutil… Read More

Yarn is a JavaScript package manager compatible with npm that allows you to install, update, configure, and remove npm packages. It was created to solve a set of problems with npm, such as s… Read More

Virtual Network Computing (VNC) is a graphical desktop sharing system that allows you to use your keyboard and mouse to remotely control another computer. This article covers the steps to in… Read More

In this tutorial, we will cover the basics of the select construct in Bash. The select construct allows you to generate menus. Bash select Construct The select construct generates a menu fro… Read More

Loops allow you to run one or more commands multiple times until a certain condition is met. However, sometimes you may need to alter the flow of the loop and terminate the loop or only the… Read More

A server block is an Nginx directive that defines settings for a specific domain, allowing you to run more than one website on a single server. For each website, you can set the site documen… Read More

pidof is a command-line utility that allows you to find the process ID of a running program. In this article, we will explain how to use the Linux pidof command. How to Use the pidof Command… Read More

Ruby is one of the most popular languages today. It has an elegant syntax, and it is the language behind the Ruby on Rails framework. In this article, we will explore different ways to insta… Read More

timeout is a command-line utility that runs a specified command and terminates it if it is still running after a given period of time. In other words, timeout allows you to run a command wit… Read More

tcpdump is a command-line utility that you can use to capture and inspect network traffic going to and from your system. It is the most commonly used tool among network administrators for tr… Read More

Vagrant is an open-source command-line tool for building and managing virtual machine environments. By default, Vagrant can provision machines on top of VirtualBox, Hyper-V. and Docker. Othe… Read More

PHP is one of the most used server-side programming languages. There are some important differences between PHP versions, so knowing which version is running on your server might be necessar… Read More

Pip is a package management system that allows you to install, remove, and otherwise manage software packages written in Python. It can be used to install packages from the Python Package In… Read More

id is a command-line utility that prints the real and effective user and group IDs. Using the id Command The syntax for the id command is as follows: id [OPTIONS] [USERNAME] If the username… Read More

Apache Tomcat is an open-source implementation of the Java Servlet, JavaServer Pages, Java Expression Language, and Java WebSocket technologies. It is one of the most widely adopted applicat… Read More

Java is one of the most popular programming languages used to build different kinds of applications and systems. There are two different implementations of Java, Oracle Java and OpenJDK. Ope… Read More

OpenCV (Open Source Computer Vision Library) is an open-source computer vision library and has bindings for C++, Python, and Java. It is used for a vast range of applications, including medi… Read More

Git is a distributed version control system that’s being used by most software teams today. It allows you to keep track of your code changes, revert to previous stages, create branches… Read More

ownCloud is an open-source, self-hosted cloud platform for managing and sharing files. It can be used as an alternative to Dropbox, Microsoft OneDrive, and Google Drive. ownCloud is extensib… Read More

Apache is an open-source and cross-platform HTTP server. It has a lot of powerful features that can be extended by a wide variety of modules. When managing Apache web servers, one of the mos… Read More

Mono is a platform for developing and running cross-platform applications based on the ECMA/ISO Standards. It is a free and open-source implementation of Microsoft's .NET framework. This tut… Read More

Gitea is a self-hosted open source git server written in Go. It is a fork of Gogs. Gitea includes a repository file editor, project issue tracking, users managements, notifications, built-in… Read More

Let's Encrypt is a certificate authority created by the Internet Security Research Group (ISRG). It provides free SSL certificates via a fully automated process designed to eliminate manual… Read More

Anaconda is the most popular Python/R data science and machine learning platform. It is used for large-scale data processing, predictive analytics, and scientific computing. Anaconda distrib… Read More

Apache HTTP server is one of the most popular web servers in the world. It is an open-source and cross-platform HTTP server that powers a large percentage of the Internet's websites. Apache… Read More

Apache Maven is an open-source project management and comprehension tool used primarily for Java projects. Maven uses a Project Object Model (POM), which is essentially an XML file containin… Read More

TensorFlow is an open-source platform for machine learning built by Google. It can runs on CPU or GPU on different devices. TensorFlow can be installed system-wide, in a Python virtual envir… Read More

There are several different authentication schemes that can be used on Linux systems. The most commonly used and standard scheme is to perform authentication against the /etc/passwd and /etc… Read More

Vagrant is a command-line tool for building and managing virtualized development environments. By default, Vagrant can provision machines on top of VirtualBox, Hyper-V, and Docker. Support f… Read More

Apache Cassandra is a free and open-source NoSQL database with no single point of failure. It provides linear scalability and high availability without compromising performance. Apache Cassa… Read More

Apache CouchDB is a free and open-source NoSQL database developed by the Apache Software Foundation. It can be used as a single-node or clustered database. CouchDB server stores its data in… Read More

New Linux converts coming from the Windows world may find working with the command line to be somewhat intimidating. However, it's not that difficult to use. All you need to get started with… Read More

In Bash, there are multiple ways to append text to a file. This article explains some of them. To append text to a file, you need to have write permissions to it. Otherwise, you will receive… Read More

If you are using Linux as your main operating system or managing Linux servers, you will come across a situation when you try to create or edit a file and receive a “Permission deny&rd&hell…Read More

Yarn is a JavaScript package manager compatible with npm that helps you automate the process of installing, updating, configuring, and removing npm packages. It was created to solve a set of… Read More

Jenkins is an open-source automation server that offers an easy way to set up a continuous integration and continuous delivery (CI/CD) pipeline. Continuous integration (CI) is a DevOps pract… Read More

Secure Shell (SSH) is a cryptographic network protocol used for an encrypted connection between a client and a server. The ssh client creates a secure connection to the SSH server on a remot… Read More

Docker is a containerization platform that allows you to quickly build, test, and deploy applications as portable, self-sufficient containers that can run virtually anywhere. Docker Compose… Read More

The RPM Package Manager (RPM) is a powerful package management system used by Red Hat Linux and its derivatives such as CentOS and Fedora. RPM also refers to the rpm command and .rpm file fo… Read More

Let's Encrypt is a free, automated, and open certificate authority developed by the Internet Security Research Group (ISRG) that provides free SSL certificates. Certificates issued by Let's… Read More

In this article, we will talk about how to replace a substring inside a string in Python, using the replace() method. .replace() Method In Python, strings are represented as immutable str ob… Read More

Odoo is the most popular all-in-one business software in the world. It offers a range of business applications, including CRM, website, e-Commerce, billing, accounting, manufacturing, wareho… Read More

In this article, we will cover the uname command. uname is a command-line utility that prints basic information about the operating system name and system hardware. uname Command The uname t… Read More

MariaDB is an open-source relational database management system, backward compatible, binary drop-in replacement of MySQL. It is developed by some of the original developers of MySQL and by… Read More

MongoDB is a free and open-source document database. It belongs to a family of databases called NoSQL, which is different from the traditional table-based SQL databases like MySQL and Postgr… Read More

Swap is a space on a disk that is used when the amount of physical RAM memory is full. When a Linux system runs out of RAM, inactive pages are moved from the RAM to the swap space. Swap spac… Read More

Xrdp is an open-source implementation of the Microsoft Remote Desktop Protocol (RDP) that allows you to graphically control a remote system. With RDP, you can log in to a Raspberry Pi box fr… Read More

Nginx pronounced “engine x” is a free, open-source, high-performance HTTP and reverse proxy server responsible for handling the load of some of the largest sites on the Internet… Read More

A time zone is a geographic region that has the same standard time. Typically the time zone is set during the installation of the operational system, but it can be easily changed at a later… Read More

Linux is a great and advanced operating system, but it is not perfect. Once in a while, some applications may start behaving erratically and become unresponsive or start consuming a lot of s… Read More

There are several different authentication schemes that can be used on Linux systems. The most commonly used and standard scheme is to perform authentication against the /etc/passwd and /etc… Read More

VirtualBox is an open-source, cross-platform virtualization platform. It supports a number of guest operating systems, including Linux and Windows, and allows you to run multiple virtual mac… Read More

Redis is an open-source in-memory key-value data store. It can be used as a database, cache, and, message broker and supports various data structures such as Strings, Hashes, Lists, Sets, an… Read More

Security Enhanced Linux or SELinux is a security mechanism built into the Linux kernel used by RHEL-based distributions. SELinux adds an additional layer of security to the system by allowin… Read More

Docker is a platform that allows you to develop, test, and deploy applications as portable, self-sufficient containers that run virtually anywhere. The docker run command creates a container… Read More

diff is a command-line utility that allows you to compare two files line by line. It can also compare the contents of directories. The diff command is most commonly used to create a patch co… Read More

Let’s Encrypt is a free, automated, and open certificate authority developed by the Internet Security Research Group (ISRG) that provides free SSL certificates. Certificates issued by… Read More

On Linux and UNIX operating systems, a Windows share can be mounted on a particular mount point in the local directory tree using the cifs option of the mount command. The Common Internet Fi… Read More

Chrome Browser is the most widely used web browser in the world. It is fast, easy to use, and secure browser built for the modern web. Chrome is not an open-source browser, and it is not inc… Read More

Go, often referred to as golang is a modern open-source programming language created by Google that allows you to build reliable and efficient applications. Many popular applications, such a… Read More

Docker is a containerization platform that allows you to quickly build, test, and deploy applications as portable, self-sufficient containers that can virtually run everywhere. It is the de… Read More

PostgreSQL, often known simply as Postgres, is an open-source general-purpose object-relational database management system. Knowing what version of the PostgreSQL server is installed and run… Read More

PostgreSQL or Postgres is an open-source general-purpose object-relational database management system with many advanced features that allows you to build fault-tolerant environments or comp… Read More

PHP is one of the most used server-side programming languages. In this guide, we will discuss how to install PHP on Debian 10, Buster. We’ll also show you how to integrate PHP with Ngi… Read More

In this article, we will talk about the w command. w is a command-line utility that displays information about currently logged in users and what each user is doing. It also gives informatio… Read More

Webmin is an open-source control panel that allows you to manage your Linux server through an easy-to-use web interface. It allows you to manage users, groups, disk quotas, create files and… Read More

In this article, we will cover the whoami command. As its name suggests, the whoami command prints the user name of the effective user ID. In other words, it displays the name of the current… Read More

Anaconda is the most popular Python/R data science and machine learning platform. It is used for large-scale data processing, predictive analytics, and scientific computing. Anaconda distrib… Read More

fsck (file system check) is a command-line utility that allows you to perform consistency checks and interactive repairs on one or more Linux file systems. It uses programs specific to the t… Read More

An ISO file is an archive file that typically contains the complete image of a CD or DVD. For example, most operating systems such as Windows, Linux, and macOS are distributed as ISO images… Read More

A firewall is a method for monitoring and filtering incoming and outgoing network traffic. It works by defining a set of security rules that determine whether to allow or block specific traf… Read More

Apache Tomcat is an open-source JAVA based application server that implements Java Servlet, JavaServer Pages, Java Expression Language, and Java WebSocket technologies. It is one of the most… Read More

Typically the hostname is set during the installation of the operating system or dynamically assigned to the virtual machine when it is created. There are a number of reasons why you may nee… Read More

Apache is an open-source and cross-platform HTTP server. It comes loaded with powerful features and can be further extended with a wide variety of modules. If you are a developer or system a… Read More

stat is a command-line utility that displays detailed information about given files or file systems. This article explains how to use stat command. Using the stat Command The syntax for the… Read More

Python is one of the most widely used programming languages in the world. With its simple and easy to learn syntax, Python is a popular choice for beginners and experienced developers. Pytho… Read More

sudo is a command-line utility that allows trusted users to run commands as another user, by default root. This tutorial shows two ways to grant sudo privileges to a user. The first one is t… Read More

Python is one of the most popular programming languages in the world. With its simple and easy to learn syntax, Python is a popular choice for beginners and experienced developers. Unlike ot… Read More

Typically when you run a command in the terminal, you have to wait until the command finishes before you can enter another one. This is called running the command in the foreground or foregr… Read More

Jenkins is the most popular open-source, Java-based automation server that allows you to easily set up a continuous integration and continuous delivery (CI/CD) pipeline. Continuous integrati… Read More

When working with text files, copying, cutting, and pasting text is one of the most commonly performed tasks. Vim or its precursor Vi comes preinstalled on macOS and almost all Linux distrib… Read More

Git remote is a pointer that refers to another copy of the repository that is usually hosted on a remote server. In some situations, like when the remote repository is migrated to another ho… Read More

Let’s Encrypt is a free, automated, and open certificate authority developed by the Internet Security Research Group (ISRG) that provides free SSL certificates. Certificates issued by… Read More

If you spend a lot of time on the command line, viewing the history of the commands you have previously run could be a useful feature that can make your day to day work more easier and impro… Read More

PostgreSQL, often known simply as Postgres, is an open-source general-purpose object-relational database management system. It has many powerful features such as online backups, point in tim… Read More

Node.js is a cross-platform JavaScript runtime environment built on Chrome’s JavaScript designed to execute JavaScript code on the server-side. With Node.js, you can build scalable net… Read More

When working on a Linux machine, sometimes you might need to find out what processes are currently running. There are number of commands that you can use to find information about the runnin… Read More

enumerate() is a built-in function in Python that allows you to have an automatic counter while looping over iterables. Python enumerate() Function The enumerate() function takes the followi… Read More

Often, when working on a project that uses Git, you’ll want to exclude specific files or directories from being pushed to the remote repository. The .gitignore file specifies what untr… Read More