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How to check if Intel Hyper-Threading is enabled in Linux

Hyper-Threading is an Intel's simultaneous multithreading (SMT) technology that is designed to improve execution parallelism of x86 CPU processors. This tutorial describes several ways to check whether or not Intel Hyper-Threading is enabled on your Linux system.

How to use indexed arrays in bash

Bash supports one-dimensional indexed arrays, which are essentially ordered lists, where you can access the values by their index (i.e., position in the list). This bash tutorial teaches you how to use indexed arrays in bash. Various usages of indexed arrays in bash are illustrated with examples.

Tcpdump cheat sheet with examples

Main power of tcpdump packet sniffing tool comes from its flexible packet filtering rules and versatile protocol dissection capability. As you may know, only the sky is the limit when it comes to packet-level monitoring with tcpdump. This post provides a comprehensive tcpdump cheat sheet with detailed examples.

How to use map, reduce and filter in Python

Functional programming approach in Python can be best illustrated by built-in functions called map(), filter(), and reduce(). This python tutorial teaches you how to use map(), filter() and reduce() functions with easy-to-follow examples.

How to use range and sequence expression in bash

This bash tutorial explains the bash's built-in brace expansion, and presents examples that illustrate how to use brace expansions to define a range or to generate a sequence of strings.

How to catch and handle errors in bash

Writing a robust, bug-free bash script is always challenging even for a seasoned system administrator. While you cannot prevent all errors in your bash script, at least you should try to handle potential error conditions in a more predictable and controlled fashion. This tutorial introduces basic tips to catch and handle errors in bash.

Natural language processing with Python

Python has become the most preferred language for Natural Language Processing (NLP) because of its great library ecosystem, platform independence, and ease of use. In this post let's find out what are the common real-world uses of NLP and what open-source Python tools and libraries are available for the NLP tasks.

How to install ELK stack on Ubuntu 20.04

When many different services and applications are deployed across multiple servers, pulling all their logs and drawing meaningful operational insights from them are not an easy task. That is where the ELK stack comes to the rescue. This tutorial will help you get started with the ELK stack by showing how to configure the ELK stack on a single Ubuntu...

How to create virtual environments in Python 3 with venv module

A Python virtual environment allows you to create a logically isolated software environment for a particular Python project, and choose a version of Python interpreter as well as install any necessary libraries for the project. The idea is for every project to have its own virtual environment. This means that Python tools installed for different projects...

How to get started with Vagrant on Linux

Virtualization allows DevOps teams to easily and quickly replicate necessary OS environments to build, test and deploy their development system on. Vagrant is an open-source, command-line based tool that allows generating reproducible and sharable virtualized environments in an automated fashion. This tutorial will help you understand the power of...

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