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How Podman can extract a container's external IP address
You can get external IP addresses for both rootfull and rootless containers with Podman.
Alexon Oliveira Mon, 1/10/2022 at 5:22pm
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Containers from above

Podman is a useful tool for deploying and managing containers. In part one of this article series, I covered how to deploy Podman containers and defined the environment I'll use in the rest of the series. In part two, I demonstrated several ways to list running containers and format their output. Read the previous parts first to understand the environment and necessary toolkit.

Topics:   Podman   Containers   Networking  
8 fundamental Linux file-management commands for new users
Learn how to create, copy, move, rename, and delete files and directories from the Linux command line.
dgarn Thu, 12/30/2021 at 5:47pm
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Laptop displaying text saying "this is where you are"

Pixabay via Pexels, CC-0

I'm a believer in the basics, and as a former technical instructor, I have a soft spot for folks who are new to Linux (and other platforms). I've written articles on the fundamentals, and I thought it was time to cover some basic file-manipulation commands.

This article looks at day-to-day tasks such as copying, moving, renaming, creating, and deleting files and directories. Here are eight commands to make managing files easier.

Topics:   Linux   Command line utilities  
8 essential Linux file navigation commands for new users
It's straightforward to get around your Linux system if you know these basic commands.
dgarn Thu, 12/30/2021 at 5:06pm
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Laptop with sticky note, phone, notepad, and coffee

Image by DarkmoonArt_de from Pixabay

The basics are, well, basic. Yet these fundamental commands and skills are critical for day-to-day work on Linux systems. Sometimes new users are overwhelmed by the details of managing Linux from the command line. What they need is a quick overview or reminder to get them going. The fancy options come later.

To that end, this article gives you eight basic filesystem navigation concepts and commands integral to file management.

Topics:   Linux   Command line utilities  
Record your terminal with script and scriptreplay
Creating documentation? Make an instant, editable video of your terminal to demo a process with these Linux commands.
skenlon Mon, 1/10/2022 at 6:51pm
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Laptop with code, pen, notebook

Photo by Lukas from Pexels

A fascinating thing about humans is that we each have a particular learning style. Some people prefer to read about how something's done. Some people prefer to follow instructions from the start, while others prefer to get an overview before engaging. Other people like to listen to instructions from an instructor or a podcast. And yet another group wants instructions in the form of a video.

5 scripts for getting started with the Nmap Scripting Engine
The NSE boosts Nmap's power by adding scripting capabilities (custom or community-created) to the network scanning tool.
dgarn Thu, 12/30/2021 at 4:09pm
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Man working on computer with headphones

Photo by Annie Spratt on Unsplash

Nmap is a popular tool for scanning and monitoring networks. There are many ways to find information using Nmap, from blogs and articles to formal training. Yet few of these learning tools discuss one of Nmap's most powerful features: The Nmap Scripting Engine (NSE).

Topics:   Networking   Scripting   Monitoring  
3 tools for troubleshooting packet filtering
Use Nmap, Wireshark, and tcpdump to sniff out router problems on your network.
dgarn Fri, 12/17/2021 at 7:26pm
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Woman monitoring data center systems

Photo by Christina Morillo from Pexels

Nmap, Wireshark, and tcpdump are helpful tools for troubleshooting your network. This article shows you how to use them with a real-world example, because when you're trying to learn a new technology or technique, sometimes the best way is to walk through a scenario.

Topics:   Networking   Troubleshooting   Monitoring  
How to troubleshoot DHCP communication problems on your network
Use Nmap, tcpdump, and Wireshark to discover why your enterprise switch and clients aren't communicating IP configurations correctly.
dgarn Mon, 12/13/2021 at 5:09pm
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How to use mtr

Imagine you have a repurposed enterprise switch with a Dynamic Host Configuration Protocol (DHCP) service that you need to troubleshoot. There is little information available about the switch's configuration or previous deployments. The device is reported to be functional and should lease Internet Protocol (IP) address configurations to clients. However, the attached clients are not receiving IP configurations from the switch.

Topics:   Troubleshooting   Networking  
Top 10 Ansible tutorials of 2021
Whether you're new to Ansible or looking to level up your automation skills, you'll find something of value in 2021's top Ansible articles.
Ricardo Gerardi Wed, 1/5/2022 at 4:44pm
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Automating ServiceNow with Red Hat Ansible Automation Platform

Photo by cottonbro from Pexels

Topics:   Ansible   Automation   Year in review  
How to use Podman to get information about your containers
Use the podman ps command to get size, resource consumption, and other information about your containers.
Alexon Oliveira Mon, 12/13/2021 at 6:43pm
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Multicolored containers at port

Mylene2401. Pixabay

Podman is a daemon-less engine for developing, managing, and running Open Container Initiative (OCI)-compliant containers. This is the second article in a series about using Podman based on things I do in my real work environment. In my previous article, I showed you how to start containers quickly and easily using the familiar interface of shell scripting.

Topics:   Podman   Containers  
Create fast, easy, and repeatable containers with Podman and shell scripts
Get started with containers in a fast, repeatable way through the familiar shell scripting interface.
Alexon Oliveira Mon, 12/13/2021 at 6:09pm
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Blue, white, orange, and brown containers stacked

Pexels, CC0

Podman is a daemon-less container engine for developing, managing, and running Open Container Initiative (OCI)-compliant containers and container images. It follows industry standards to provide a robust container-management tool that you can also integrate into Kubernetes and other services as needed.

Topics:   Podman   Containers