System Administration

Week 12, System Security II: Defining a Threat Model

In this video, we look at the concept of a Threat Model and how the attack economics may shift based on your adversaries capabilities and motives. We introduce the STRIDE and DREAD models and draw a few circles, of course.

https://youtu.be/nZQboq3gjgg

#SysAdmin #SRE #DevOps #InfoSec

Interlude dans la projet de migration de VM sous #Proxmox, on fait de l'entretien hardware, et c'est tout de suite sur https://twitch.tv/ahp_nils ! #sysadmin #devops #twitchfr #twitchstreamer #TwitchStreamers #linux #patethermique

Learn Kubernetes & Docker - .NET Core, Java, Node.JS, PHP or Python by Arnaud Weil is free with a Leanpub Reader membership! Or you can buy it for $11.99! http://leanpub.com/k8s #Devops #Docker #Aspnet #Python #NodeJs

A Simple Path to Python Success http://leanpub.com/set/leanpub/asimplepathtopythonsuccess by Christian Mayer, Lukas Rieger, and Shubham Sayon is the featured Track of online courses on the Leanpub homepage! https://leanpub.com #ComputerProgramming #Devops

BSDCan is in Ottawa, with tutorials June 11-12, 2025, talks & BOFs June 13-14, 2025

Registration is open - https://www.bsdcan.org/2025/registration.html

Also see https://blog.bsdcan.org/2025/03/18/bsdcan-2025-talks-tutorials-and-registration/ for descriptions and tips, contributions: https://indico.bsdcan.org/event/5/contributions/

#bsdcan #conference #bsd #unix #development #freebsd #netbsd #openbsd #sysadmin #devops #freesoftware #libresoftware

System Administration

Week 12, System Security I: Risk Assessment

In this video, we begin our dedicated discussion of System Security with a look back at how we've talked about security relevant aspects in previous videos and then moving forward to defining how we can begin to assess risk rather than attempt to "secure" a system.

https://youtu.be/KZi9ZWF6vWI

#SysAdmin #SRE #DevOps #InfoSec

EuroBSDCon 2025, Zagreb, September 2025 -

The Call for Talk and Presentation proposals for EuroBSDCon 2025 is open.

Submit yours at https://events.eurobsdcon.org/2025/

Please also visit the main website https://2025.eurobsdcon.org/ for information about the conference.

See you in Zagreb!

#eurobsdcon #bsd #conference #freebsd #openbsd #netbsd #unix #development #devops #freesoftware #libresoftware @eurobsdcon

BSDCan is in Ottawa, with tutorials June 11-12, 2025, talks & BOFs June 13-14, 2025

Registration is open - https://www.bsdcan.org/2025/registration.html

Also see https://blog.bsdcan.org/2025/03/18/bsdcan-2025-talks-tutorials-and-registration/ for descriptions and tips

#bsdcan #conference #bsd #unix #development #freebsd #netbsd #openbsd #sysadmin #devops #freesoftware #libresoftware

Dew Drop Weekly Newsletter #429 - Two weeks ending April 25, 2025. buff.ly/hiLOwdo #dewdrop #newsletter #dotnet #csharp #ai #aspnetcore #javascript #azure #devops #agile #podcasts #m365 #data #sqlserver

Dew Drop Weekly Newsletter 429...

Dew Drop Weekly Newsletter #429 - Two weeks ending April 25, 2025.

https://zc.vg/uj2dt?m=0

#dewdrop #newsletter #dotnet #csharp #ai #aspnetcore #javascript #azure #devops #agile #podcasts #m365 #data #sqlserver

Introducing bpflogd(8): capture packets via BPF to log files https://www.undeadly.org/cgi?action=article;sid=20250425074505 #openbsd #bpflogd #bpf #networking #logging #development #sysadmin #devops #security #platformengineering

The Software Developers’ Guidebook: A Collection of Modern Engineering Practices https://leanpub.com/softwaredevelopersguidebook by David Farley and Bernard McCarty (Editor) is the featured book on the Leanpub homepage! https://leanpub.com #ComputerProgramming #SoftwareEngineering #Devops #Software #Testing #AutomatedSoftwareTesting #books #ebooks

A practical handbook packed with real-world advice to help you write better code, adopt effective developer habits, and build great software.

Find it on Leanpub!

System Administration

Week 11, Configuration Management II

In this video, we continue our discussion of configuration management systems. We talk about state assertion, what states of a host we might care about, the CAP theorem and other fallacies of distributed systems, idempotence, eventual consistency and convergence, and the overlap of CM systems with other infrastructure components, yielding, eventually, infrastructure as a service.

https://youtu.be/FJSpmBPv1J4

#SysAdmin #SRE #DevOps

non #agile #devops folks what's your preferred branching strategy and why
#git

7 Course-Bundle: Shut Up and Code Python + PyCharm + Coding Interview + Machine Learning + One-Liners + Regex + Lambdas http://leanpub.com/set/leanpub/7courses is the featured Track of online courses on the Leanpub homepage! https://leanpub.com #ComputerProgramming #Devops #python #programming

🚀 Transform code reviews from annoying chores to valuable collaboration. At #DevConf2025, Paco van Beckhoven from Hexagon demonstrates practical tactics for better PRs, positive feedback culture, and smart automation. For engineers who want better code and happier teams. #DevOps

System Administration

Week 11, Configuration Management I

In this video, we illustrate the general evolution of the management of system configuration and then talk about defining services by abstracting individual requirements for system-specific and service-specific aspects. We present a few sample snippets of Puppet, Chef, and CFEngine code to give you a taste of some common CM systems.

https://youtu.be/pY0mCH7tpR0

#SysAdmin #SRE #DevOps

PowerShell 101 by Mike F. Robbins is free with a Leanpub Reader membership! Or you can buy it for $7.99! http://leanpub.com/powershell101 mikefrobbins@fosstodon.org #PowerShell #Devops

System Administration

Week 10, Time Travel and Snapshots

Get in, we have to go back... to the snaphots!

In this video, we demonstrate filesystem snapshots using fss(4) on #NetBSD, ZFS on #OmniOS, and how NetApp's WAFL and macOS's Time Machine work.

https://youtu.be/zIEBnZAd5dE

#SysAdmin #SRE #DevOps

A Simple Path to Python Success http://leanpub.com/set/leanpub/asimplepathtopythonsuccess is the featured Track of online courses on the Leanpub homepage! https://leanpub.com #ComputerProgramming #Devops #python #data #datascience

Master Python https://leanpub.com/b/masterpython by Noah Gift and Alfredo Deza is the featured bundle of ebooks 📚 on the Leanpub homepage! https://leanpub.com #Python #Devops #SoftwareEngineering #AutomatedSoftwareTesting #NodeJs #Ruby #Go #R #CloudComputing #books #ebooks

On continue la tentative de migration de VM sous #Proxmox, c'est tout de suite sur https://twitch.tv/ahp_nils ! #sysadmin #devops #twitchfr #twitchstreamer #TwitchStreamers #linux

System Administration

Week 10, Backups by example

In this video, we illustrate how to perform backups using tar(1) (overcoming xkcd/1168), dump(8) and restore(8), and rsync(1), both locally and to a remote system.

https://youtu.be/L4SB8UfFz8c

#SysAdmin #DevOps #SRE

This is why Deming and Goldratt are such useful people to discover if you're in software delivery. This problem cloud isn't even about software, but it basically describes #DevOps in a nutshell.

Alt...

A core problem cloud that shows a progress vs stability conflict, mapping back to a shared goal of improving system performance.

Meanwhile in DevOps No.26

Murray invents Team Nopologies!

#DevOps #TeamTopologies

Alt...

Murray and Arlo are discussing team design after discovering Team Topologies. Murray is looking happy and a little vacant. “We have a DevOps team, an SRE team, and a Platform Team,” Murray says. “Yet we still suck at software delivery!” “Let’s go talk to the feature teams to understand this,” Arlo replies thoughtfully. “Feature teams?” Murray blurts.

A Simple Path to Python Success http://leanpub.com/set/leanpub/asimplepathtopythonsuccess is the featured Track on the Leanpub homepage! https://leanpub.com #ComputerProgramming #Devops

My definition of a successful day in #DevOps is when nothing explodes.

#Kubernetes #AWS #EKS #DevOps #PlatformEngineering #k8s #kh8s

Alt...

Jake the dog on hands and knees screaming "having to redo your EKS kubeconfig for the 6th time"

Meanwhile in DevOps No.25

#DevOps #ThoughtLeadership

Alt...

Murray and Arlo are discussing DevOps. Murray is looking happy and a little vacant. He points at his screen. "DevOps was originally just about collaboration and shared goals," Arlo begins. "Then we did a decade of research on technical and cultural practices. Now we have our deepest ever understanding of software delivery!" Murray leaps out of his chair. "Yeah, but nobody *really* understands what DevOps is!"

7 Course-Bundle: Shut Up and Code Python + PyCharm + Coding Interview + Machine Learning + One-Liners + Regex + Lambdas http://leanpub.com/set/leanpub/7courses by Christian Mayer, Lukas Rieger, and Shubham Sayon is the featured Track of online courses on the Leanpub homepage! https://leanpub.com #ComputerProgramming #Devops

Mastering Containers https://leanpub.com/b/masteringcontainers by Nigel Poulton is the featured bundle of ebooks 📚 on the Leanpub homepage! https://leanpub.com #Docker #Devops #Aws #ComputerProgramming #books #ebooks

Learn Kubernetes & Docker - .NET Core, Java, Node.JS, PHP or Python by Arnaud Weil is free with a Leanpub Reader membership! Or you can buy it for $11.99! http://leanpub.com/k8s #Devops #Docker #Aspnet #Python #NodeJs

Migration de VM sous #Proxmox, c'est tout de suite sur https://twitch.tv/ahp_nils ! #sysadmin #devops #twitchfr #twitchstreamer #TwitchStreamers #linux

Learn Kubernetes & Docker - .NET Core, Java, Node.JS, PHP or Python by Arnaud Weil is free with a Leanpub Reader membership! Or you can buy it for $11.99! http://leanpub.com/k8s #Devops #Docker #Aspnet #Python #NodeJs

Ansible for DevOps by Jeff Geerling is on sale on Leanpub! Its suggested price is $9.99; get it for $6.99 with this coupon: https://leanpub.com/sh/cDMO9Zrk #Agile #Software #Startups #Ansible #Devops #CloudComputing

Dew Drop Weekly Newsletter #428 - Week ending April 11, 2025. zc.vg/yissD?m=0 #dewdrop #newsletter #javascript #aspnetcore #windev #xaml #csharp #dotnet #ai #devops #agile #podcasts #mobiledev #m365 #data #sqlserver #windows

Dew Drop Weekly Newsletter 428...

Dew Drop Weekly Newsletter #428 - Week ending April 11, 2025.

https://zc.vg/yissD?m=0

#dewdrop #newsletter #javascript #aspnetcore #windev #xaml #csharp #dotnet #ai #devops #agile #podcasts #mobiledev #m365 #data #sqlserver #windows

System Administration

Week 10, Backups: Core Concepts

In this video, we begin our discussion of backups by covering some core concepts and terminology, looking at full vs. incremental vs. differential backups and the difference between long-term storage and disaster recovery of files due to more localized data loss.

https://youtu.be/IRu04Mc7VlA

#SysAdmin #SRE #DevOps

🐱 Modular monoliths require boundaries, consistent care, and security planning—just like cats! Join William Brander at #DevConf2025 to discover how this surprising analogy can transform your approach to software architecture and security. #DevOps #SecOps

"A DevOps engineer is just as capable of malicious behavior as any other engineer. The solution isn't to block access—it's to make actions transparent and reviewable. Security comes from visibility, not locked doors."

#devops #devsecops #platformengineering #security #zerotrust

https://rethinkingsoftware.substack.com/p/in-retrospect-devops-was-a-bad-idea

Oops! The MXP01 (Italy) peer had some fuck ups, followed by some insane traffic f*ckups at 3AM & 6AM on the other instances.

Rule Nr. 1: Even changing a single character can result in f*ckups. Always test!

#devops #bgp #peering #ipv6 #traffic #fail #network

System Administration

Week 9, Writing System Tools

This week we're going on a side-quest to discover solid #programming best practices that apply across simple scripting, prototyping, growing your tools, and owning a software product. We don't have videos for this topic, but the slides below include a lot of hopefully useful links ranging from coding style to ticket management and commit messages.

https://stevens.netmeister.org/615/09-writing-system-tools.pdf

#SysAdmin #DevOps #SRE

Alt...

A flow-chart like illustration of the evolution of sysadmin tools from shell aliases and scripts to /usr/local/bin tools to system-wide installation to full-fledged software product with an API. As complexity increases, the number of users increases, but the number of assumption we can make about the environment in which the code runs decreases.

A Simple Path to Python Success http://leanpub.com/set/leanpub/asimplepathtopythonsuccess is the featured Track of online courses on the Leanpub homepage! https://leanpub.com #ComputerProgramming #Devops #python

EuroBSDCon 2025, Zagreb, September 2025 - Call for Talk and Presentation proposals is open

The Call for Talk and Presentation proposals for EuroBSDCon 2025 is now open.

Submit yours at https://events.eurobsdcon.org/2025/

Please also visit the main website https://2025.eurobsdcon.org/ for information about the conference.

See you in Zagreb!

#eurobsdcon #bsd #conference #freebsd #openbsd #netbsd #unix #development #devops #freesoftware #libresoftware @eurobsdcon