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Since 1994: The Original Monthly Magazine of the Linux Community

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How to Replace a Variable in a File Using SED

by Suparna Ganguly Want to know the tricks of replacing a variable in a file using the SED command? This article will give you an overview of replacing a variable value in a file using SED. Before replacing a variable in a file using SED, you need to understand what SED is, the syntax of SED, and how SED works. I’ll also show...

How to Create a Shell Script in Linux

by Suparna Ganguly Do you want to create a Shell script in your Linux system? This guide will take you through how to create a shell script using multiple text editors, how to add comments, and how to use Shell variables. But before heading over to creating a shell script, let’s understand what Shell scripting in Linux is....

SQLite Extraction of Oracle Tables Tools, Methods and Pitfalls

by Charles Fisher Introduction The SQLite database is a wildly successful and ubiquitous software package that is mostly unknown to the larger IT community. Designed and coded by Dr. Richard Hipp, the third major revision of SQLite serves many users in market segments with critical requirements for software quality, which SQLite...

Vulnerability Detection and Patching: A Survey Of The Enterprise Environment

by Joao Correia Detecting vulnerabilities and managing the associated patching is challenging even in a small-scale Linux environment. Scale things up and the challenge becomes almost unsurmountable. There are approaches that help, but these approaches are unevenly applied. In our survey, State of Enterprise Vulnerability Detection...

Live Patching Requires Reproducible Builds – and Containers Are the Answer

by Joao Correia We know that live patching has real benefits because it significantly reduces the downtime associated with frequent patching. But live patching is relatively difficult to achieve without causing other problems and for that reason live patching is not implemented as frequently as it could be. After all, the last thing...

An Abridged Guide to the Enterprise Linux Landscape

by Rod Cope Whether you are welcoming CentOS Stream or looking for alternatives, the recent decision from the CentOS community to focus on CentOS Stream has forced a lot of technical leaders to rethink their Enterprise Linux strategy.  Beneath that decision, the business landscape involving Linux has shifted and expanded since its...

Systemd Service Hardening

by Alessio Greggi Introduction In an age where hacker attacks are a daily occurrence, it is of fundamental importance to minimize the attack surface. Containerization is probably the best way to isolate a service provided for the public, but this is not always possible for several reasons. For example, think of a legacy system...

eBPF for Advanced Linux Infrastructure Monitoring

by Odysseas Lamztidis A year has passed since the pandemic left us spending the better part of our days sheltering inside our homes. It has been a challenging time for developers, Sysadmins, and entire IT teams for that matter who began to juggle the task of monitoring and troubleshooting an influx of data within their systems and...

How to set up a CrowdSec multi-server installation

by Manuel Sabban Introduction CrowdSec is an open-source & collaborative security solution built to secure Internet-exposed Linux services, servers, containers, or virtual machines with a server-side agent. It is a modernized version of Fail2ban which was a great source of inspiration to the project founders. CrowdSec...

Develop a Linux command-line Tool to Track and Plot Covid-19 Stats

by Nawaz Abbasi It’s been over a year and we are still fighting with the pandemic at almost every aspect of our life. Thanks to technology, we have various tools and mechanisms to track Covid-19 related metrics which help us make informed decisions. This introductory-level tutorial discusses developing one such tool at just Linux...

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