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Speeding up container image builds with Buildah

Buildah can greatly increase the speed of builds and reduce the number of resources required to support a build farm

How To Disable Unattended Upgrades On Ubuntu

Ubuntu has a feature named Unattended Upgrades, which installs the latest security updates automatically. This guide describes how to disable unattended upgrades on Ubuntu.

Exploring the Linux /proc filesystem

There's a wealth of information for sysadmins in the /proc filesystem and it's time to explore it.

15 Important PostgreSql commands you must know

  • https://devopsmyway.com; By C Chakravarty (Posted by devopsmyway on Mar 15, 2020 7:22 PM EDT)
  • Story Type: Tutorial; Groups: Linux
These are important PostgreSQL commands that you must know as a DevOps/Database Admin. I would recommend you to also read my earlier article for PostgreSQL Installation.

How to Install FlintCMS on CentOS 7

In this tutorial, we will show you how to install FlintCMS on a CentOS 7 VPS. FlintCMS is a free and open-source, super-fast, content-focused, Node.js-based Content Management System (CMS). It provides a flexible and easy-to-use interface for creating and managing websites, blogs, and other types of content.

How I migrated from a Mac Mini to a Raspberry Pi

  • Opensource.com; By Peter Garner (Posted by bob on Mar 15, 2020 2:59 PM EDT)
  • Story Type: Tutorial; Groups: Raspberry Pi
Some time ago, I decided to move my computing environment from a Mac Mini PowerPC to a Raspberry Pi Model 2. This article describes my reasons for doing so and how I did it. While?it is quite technical in places, if you're considering switching from an existing system to something decidedly lean and mean, there are things that you need to know before making that leap. There are lots of links to click as well, which will lead you to the software and apps that I mention.

Nested KVM performance evaluation on Ubuntu 20.04 (Focal Fossa)

Performance appraisal has been done via attempt to set up Ubuntu 20.04 as KVM virtualization host installing Qemu && Libvirt. Please, be aware that successful install KVM on Ubuntu 20.04 (bare metal) might require in meantime CPU's generation Haswell at least.

How to Install Ruby on Debian 10

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 look into different ways to install Ruby on Debian 10. In this article, we will look into different ways to install Ruby on Debian 10. We'll show how to install Ruby from the default Debian 10 repositories and using the Rbenv and RVM scripts. Choose the installation method that is most appropriate for your setup and environment.

How To Backup and restore data using Restic On Linux

  • ostechnix.com; By Senthil Kumar (Posted by ostechnix on Mar 15, 2020 6:13 AM EDT)
  • Story Type: Tutorial; Groups: Linux
Install restic and how to backup and restore data using Restic on Linux.

How to Create a Plex Server on Raspberry Pi 4

Plex is a media server software that allows you to stream your movies to any Plex client. Here we show how to create a Plex server on Raspberry Pi 4.

Adding a display to a travel-ready Raspberry Pi Zero

  • Opensource.com; By Peter Garner (Posted by bob on Mar 15, 2020 1:50 AM EDT)
  • Story Type: Tutorial; Groups: Raspberry Pi
In my earlier article, I explained how I transformed a Raspberry Pi Zero?into a minimal, portable, go-anywhere computer system that, although small, can actually achieve useful things. I've since made iterations that have proved interesting and made the little Pi even more useful. Read on to learn what I've done.

How to send one-liner emails from Linux/Ubuntu terminal – Embed email sending feature into your application

  • net2.com; By Ziad Nahdy (Posted by zn52 on Mar 14, 2020 11:39 PM EDT)
  • Story Type: Tutorial; Groups: Linux
In this short tutorial, you will learn how to send one-liner emails using sSMTP from your Linux Ubuntu/Debian terminal. But why on earth would we want to send Emails from the terminal ? Well there could be many reasons. For instance you would want to build an application which sends Emails …You will also be able to attach files to the Email.

Managing Linux Users & Groups

As we all know Linux is a multi-user operating system. If you have multiple users operating on a desktop or a server, you can easily create multiple users accounts and grant permissions as per each account.

How to Install R on CentOS 8

R is an open-source programming language and free environment that specializes in statistical computing and graphical representation. It is supported by the R Foundation for Statistical Computing and mainly used by statisticians and data miners for developing statistical software and performing data analysis. This article describes how to install R on CentOS 8.

Make SSL certs easy with k3s

In a previous article, we deployed a couple of simple websites on our k3s cluster. There were non-encrypted sites. Now that's fine, and they work, but non-encrypted is very last century! These days most websites are encrypted. In this article, we are going to install cert-manager and use it to deploy TLS encrypted sites on our cluster. How to encrypt your website with k3s and Letsencrypt on a Raspberry Pi.

How to Install PHP 7.3 on CentOS 7

PHP is a server-side scripting language, commonly used for Web development, but it is also used as a general-purpose programming language. It is the most popular server-side (back-end) programming language and it powers some of the most popular products on the market, such as WordPress, the most widely used content management system, as well as e-commerce platforms such as Magento and PrestaShop. The process of installing PHP 7.3 on CentOS 7 is a pretty easy and straightforward task, and it can be done in less than 10 minutes. In this tutorial, we will guide you through the steps of installing the latest PHP version 7.3 on a CentOS 7 VPS.

You can't do GitOps until you can git add

Want to try GitOps? First, you'll need your environment in Git. We'll show you how!

How To: Migrate iptables to nftables in CentOS 8

Convert existing iptables ruels into nftables native format in CentOS 8 and RedHat 8

How to Install Yarn Package Manager on Ubuntu

  • Cloudbooklet; By Pappin Vijak (Posted by cloudbooklet on Mar 13, 2020 6:52 PM EDT)
  • Story Type: Tutorial
How to Install Yarn Package Manager on Ubuntu. Yarn is a JavaScript package manager that helps you automate the process of installing, updating, configuring, and removing npm packages easily. It also speeds up the process of the package installation and also prevents the errors related to network connectivity.

Using at for single-use cron jobs in Linux

Scheduling a single job is easy with the at command and can be done without going cron crazy. Find out how.

Solve "Cannot change group vboxusers for device /dev/vboxdrv" Virtualbox Error

This brief guide explains how to solve "vboxdrv.sh: failed: Cannot change group vboxusers for device /dev/vboxdrv." Virtualbox error in Ubuntu.

How to Install and Use FFmpeg on CentOS 8

  • Linuxize.com; By linuxize (Posted by linuxize on Mar 13, 2020 8:57 AM EDT)
  • Story Type: Tutorial
FFmpeg is a free and open-source collection of tools for handling multimedia files. It contains a set of shared audio and video libraries such as libavcodec, libavformat, and libavutil. With FFmpeg, you can convert between various video and audio formats, set sample rates, capture streaming audio/video, and resize videos.

Vim Tips - Edit Remote Files With Vim On Linux

Vim is one of the best, highly configurable text editor that comes with a lot of unique features that you can’t find in other text editors. Today, we will discuss one of the useful feature – editing remote system’s files from the local system. This guide explains how to edit remote files with Vim on Linux.

5 tips to ace a sysadmin interview

Systems administrators are sought-after positions, and in order to get there, you’ll need to bring a solid combination of technical know-how and interview skills. Here are some tips for aspiring sysadmins to wow their interviewers.

Intro and Installation of Kubernetes

Anyone using Docker can use Kubernetes to create a cluster. A cluster is when there are multiple systems working together as a single unit. If one system fails then the other systems will resume the failed processes to keep the resource active.

Directing Kubernetes traffic with Traefik

In this article, we will deploy a couple of simple websites and learn how to ingress traffic from the outside world into our cluster using Traefik. After that, we will learn how to remove Kubernetes resources as well. Let’s get started!

Brute Force Attacks - Pen Testing Using Hydra and RSMangler

Most security experts agree that one of the biggest security vulnerabilities is the password. Despite a growing concern for privacy and anonymity, users and IT departments alike are ignoring basic cybersecurity best practices, especially password hygiene. In this article we will introduce you to some tools that will demonstrate how easy it is to gain unauthorized access via password cracking and brute force attacks.

How to write effective documentation for your open source project

Unfortunately, good code won't speak for itself. Even the most elegantly designed and well-written codebase that solves the most pressing problem in the world won't just get adopted on its own. You, the open source creator, need to speak for your code and breathe life into your creation. That's where technical writing and documentation come in.

HTOP - A Nifty Tool to Monitor Linux System Performance

Most of us are not familiar with the Htop Command because most of the time we use the top command to keep track of Linux system performance. But htop is a great alternative to the top command, which has many features and options compared to the top command.

How to install the NVIDIA drivers on Fedora 31

The NVIDIA Driver is a program needed for your NVIDIA Graphics GPU to function with better performance. It communicates between your Linux operating system, in this case Fedora 31, and your hardware, the NVIDIA Graphics GPU. The NVIDIA drivers can be installed by using the bash command after stopping the GUI and disabling the nouveau driver by modifying the GRUB boot menu. To install Nvidia driver on other Linux distributions, follow our Nvidia Linux Driver guide.

Bullet journaling for sysadmins

While so-called bullet journaling is a new trend, using analog techniques to track and manage your digital workflow is nothing new. If you're not doing it, you should be.

Sysadmin tools: exa, a modern alternative to ls in Linux

Out with the old, in with the new! Explore an improvement on a classic Linux tool for listing files at your command line.

Install and Configure Monitorix Monitoring Software on Debian 10

  • Howtoforge Linux Howtos und Tutorials (Posted by bob on Mar 11, 2020 6:32 PM EDT)
  • Story Type: Tutorial; Groups: Debian, Linux
Monitorix is a lightweight open-source computer network monitoring tool that can be used to monitor overall system performance. In this tutorial, I will explain how to install Monitorix monitoring server on Debian 10.

Life tables

  • BASHing data; By Bob Mesibov (Posted by Bob_Mesibov on Mar 11, 2020 9:49 AM EDT)
  • Story Type: Tutorial
How many years do you have left to live? What are the chances you'll die before your next birthday? Life tables and gnuplot graphs offer some non-definitive answers.

How to Turn Your Raspberry Pi 4 into an Edge Gateway

If you're going to transmit large amounts of data to the cloud, you can improve performance and response times by using your Raspberry Pi as an edge gateway

3 ways to configure a network interface in Linux

Few things are more important to your machine than a good network connection. Here are three ways to configure the interfaces needed to make this happen.

How to Disable Graphics Mode on Raspberry Pi

Recent versions of Raspbian OS are using systemd which means it's possible to use it for disabling graphics mode on Raspberry Pi.

5 Ways To Repeat Your Last Command In Linux

  • ostechnix.com; By Senthil Kumar (Posted by ostechnix on Mar 10, 2020 9:31 PM EDT)
  • Story Type: Tutorial; Groups: Linux
This brief guide explains different ways to repeat your last command in Linux operating systems with practical examples.

Introduction to the alternatives command in Linux

Discover alternatives, which creates, removes, maintains, and displays information about the symbolic links comprising the alternatives system.

How To Disable Touchpad While Typing In Ubuntu Using Syndaemon Program

Syndaemon is command line program that monitors the keyboard activity and disables the Touchpad when the keyboard is being used.

How to Install Skype on Debian 10

  • vitux.com; By Karim Buzdar (Posted by vitux on Mar 10, 2020 8:17 AM EDT)
  • Story Type: Tutorial; Groups: Debian
Skype is one of the most popular communication application developed by Microsoft. It allows for instant messaging and audio, video calls. This tutorial shows two ways to install Skype on Debian 10.

How to make LibreOffice templates to save time

  • Opensource.com; By Jess Weichler (Posted by bob on Mar 10, 2020 7:03 AM EDT)
  • Story Type: Tutorial; Groups: Community
LibreOffice templates save you time by making it easy to open a blank copy of documents you use often, such as budgets, form letters, and slideshow presentations. This not only serves as a quick and easy starting point for repetitive work, but it can also ensure consistency when working in groups or in a large organization. LibreOffice ships with some templates already available, but you can also create your own.

How to Install GitScrum on Debian 10

GitScrum is a free and open-source Laravel task management application that helps you to manage your projects easily. In this tutorial, we will show you how to install GitScrum project management software on Debian 10 server.

Fish - A Friendly Interactive Shell

  • Fedora Magazine; By Michal Kone?ny (Posted by bob on Mar 10, 2020 12:51 AM EDT)
  • Story Type: Tutorial; Groups: Fedora, Linux
Fish (friendly interactive shell) is a smart and user-friendly command line shell that works on Linux, MacOS, and other operating systems. Use it for everyday work in your terminal and for scripting. Scripts written in fish are less cryptic than their equivalent bash versions.

Install the Latest Nvidia Linux Driver

  • Linuxconfig.org; By Lubos Rendek (Posted by LinuxCareer on Mar 9, 2020 10:22 PM EDT)
  • Story Type: Tutorial; Groups: Linux
Most of the modern Linux Desktop systems come with Nvidia driver pre-installed in a form of the Nouveau open-source graphics device driver for Nvidia video cards. Hence depending on your needs and in most of the situations there is no need for an additional Nvidia Linux Driver installation procedure.

Automatically Optimize CPU Speed And Power With Auto-cpufreq In Linux

  • ostechnix.com; By Senthil Kumar (Posted by ostechnix on Mar 9, 2020 7:54 PM EDT)
  • Story Type: Tutorial; Groups: Linux
Auto-cpufreq is an automatic CPU speed and power optimizer for Linux. Learn how to automatically optimize CPU speed and power with auto-cpufreq.

7 tips to speed up your Linux command line

The command line doesn't have to be tedious, it can be awesome with these shortcuts.

How To Copy Directory on Linux

Copying directories on Linux is a big part of every system administrator routine. If you have been working with Linux for quite some time, you know how important it is to keep your folders well structured. In some cases, you may need to copy some directories on your system in order revamp your main filesystem structure. In this tutorial, we are going to see how you can easily copy directories and folders on Linux using the cp command.

How To Analyze Wikipedia Data Tables Using Python Pandas

In this post, I will show you how to plot graphs from the Wikipedia data tables.

How To Install Firejail In Linux

Firejail is a SUID security sandbox based on Linux Namespace and seccomp-bpf (Secure computing mode). Firejail can run graphical or command-line applications in a sandbox, reduces the risk of security breaches by restricting the untrusted applications.

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