How to Upgrade Your Server to Ubuntu 18.04 LTS

ubuntu 18.04

Follow these detailed step-by-step instructions on how to upgrade your 16.04 Ubuntu server to Ubuntu 18.04 LTS via SSH. Beginner-friendly.

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Linux 'users' Command Tutorial for Beginners (with Examples)

Sometimes, while working on the Linux command line, you might want to quickly check which all users are currently logged in to the system. Well, there's a built-in Linux command line utility that lets you do this easily. The tool in question is 'users', and in this tutorial, we will discuss the basics of it using some easy to understand examples. Read More

Person with diabetes finds open source and builds her own medical device

Red Hat's 2018 Women in Open Source Community Award winner is Dana Lewis. Hear her story.

How To Create a Sudo User on Ubuntu

sudo is command designed to allow users to run programs with the security privileges of another user, by default the root user. In this guide we will show you how to create a new user with sudo privileges on Ubuntu. Read More

Resetting lost Linux root passwords, a history of bad passwords, Python, Ruby, classroom solutions, and more

Our hottest articles last week included contributions from PyCon and Red Hat Summit speakers. Read on to see what was most popular on Opensource.com the week of April 30-May 6: Read More

Getting started with Jenkins Pipelines

Jenkins is a well-known open source continuous integration and continuous development automation tool. It has an excellent supporting community, and hundreds of plugins and developers have been using it for years.

This article will provide a brief guide on how to get started with Pipelines and multibranch pipelines. Read More

Best Linux Distro for Programming

An ultimate guide to choosing the best Linux distro for programming. Compare the best examples, learn more about the programming tools on Linux, compare Linux to Windows for programming, and more.

How to add users to a group in Linux

Linux offers versatile user/group structures. In this article, we will explore how to create and add users to a group.
In Linux, every process has an associated user, which tells you who initiated the process. Every file/directory is owned by a user and a group. Users who are associated with a file/directory can tell which user has access to that file and what they can do with it. A user who is associated with a process determines what that process can access. Read More

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Install an OpenStack cloud with Jenkins

Jenkins is a well-known automation server often used for automating tasks involving building, testing, and deploying applications in a continuous integration/continuous development (CI/CD) format. In this tutorial, I will explain how to install and configure Jenkins and create a job that installs PackStack (a proof of concept OpenStack cloud). Read More

Simple Cloud Hardening

I've written about simple server-hardening techniques in the past. Those articles were inspired in part by the Linux Hardening in Hostile Networks book I was writing at the time, and the idea was to distill the many different hardening steps you might want to perform on a server into a few simple steps that everyone should do. In this article, I take the same approach only with a specific focus on hardening cloud infrastructure.

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