Tag Archives: technology

Old News Summary, July 25th, 2025

Here’s a reminder of 3 month old news.

Summarize and analyze old news from July 25, 2025.

Julia McCoy
Microsoft Just Laid Off 15,000 Workers
https://lnkd.in/gPFrZutw

Here’s a summary and analysis of the July 25, 2025 video

🧾 Summary
Event:
Microsoft laid off 15,000 employees in what became the largest workforce reduction in its history.
Official Reason:
Budget cuts.
Underlying Cause (per internal sources):
Massive AI-driven restructuring. Microsoft is investing $80 billion in AI infrastructure (up from $56B the previous year), signaling a strategic pivot toward automation and AI-native operations.
Key Internal Insights:
Employees were categorized into:
AI-enhanced: Using AI to 10x productivity.
AI-resistant: Avoiding or struggling with AI tools.
AI-redundant: Jobs fully automatable.
Layoffs disproportionately affected groups 2 and 3.
Managers tracked AI usage, incentivized adoption (e.g., $50 gift card contests), and used it as a performance metric.
Skills deemed obsolete: basic data analysis, routine customer service, standard admin tasks, and non-AI-assisted coding.
In-demand skills: AI tool mastery, human-AI collaboration, AI project management, and training others in AI.
Strategic Shifts:
Microsoft is consolidating solution areas (from 6 to 3).
Replacing technical specialists with AI-savvy solution engineers.
Encouraging all employees to “invest in your own AI skilling.”
Advice to Workers:
Don’t wait. Learn AI tools now.
Use AI for at least 50% of daily tasks.
Build AI-powered workflows and train others.
Lead AI initiatives to become indispensable.
🔍 Analysis
This isn’t just a layoff story—it’s a case study in AI-era workforce triage. Microsoft’s internal framing of employees as “enhanced,” “resistant,” or “redundant” signals a new kind of performance metric: not just what you do, but how well you collaborate with AI.
The layoffs reflect a broader trend:
AI is not just a tool—it’s a filter. Companies are using AI adoption as a proxy for adaptability and future value.
Upskilling is no longer optional. Workers who delay AI literacy risk being labeled as obsolete, regardless of tenure or past performance.
Human-AI collaboration is the new productivity frontier. The highest-paid roles will go to those who can orchestrate, not just execute.
This moment echoes past industrial revolutions—but with a twist. The speed and scale of AI integration mean the “adapt or be replaced” window is shrinking fast. Microsoft’s $80B AI bet is a signal to every knowledge worker: the AI-native era is not coming. It’s here.

OPNSense Firewalls

Google AI Overview

OPNsense firewall guidelines emphasize a default-deny security posture, where all traffic is blocked unless explicitly allowed via interface rules. To configure rules, navigate to Firewall → Rules, select your interface (like WAN or LAN), click the ‘+’ icon, and define the rule’s Action (Pass, Block, or Reject), Source, Destination, and optional logging. For efficient rule processing, use the “in” direction on the interface where traffic originates. Prioritize block rules over allow rules to ensure they are enforced first, use meaningful descriptions for easier management, and leverage the rollback feature to recover from accidental lockouts.

General Best Practices

Stateful Firewall:
OPNsense is a stateful firewall, automatically allowing return traffic for established sessions, but new incoming connections must be explicitly permitted. 

Default Deny:

Block everything by default and only permit what is necessary.
Principle of Least Privilege:

Apply rules with the minimum permissions required for a device or network to function.
Use Aliases and Groups:

Group hosts, networks, or ports into aliases to simplify management and improve readability of rules.

Logging:
Enable logging for block and reject rules, especially for internal networks, to quickly identify issues and security events.

Direction:
Prefer the “in” direction for rules, as it’s generally more efficient than “out”.

Rule Configuration Steps

Access Rules: Go to Firewall → Rules in the OPNsense web GUI. 

Select Interface: Choose the network interface (e.g., LAN, WAN, VLAN) to which the rule will apply.

Add New Rule: Click the orange ‘+’ icon to create a new rule.

Set Action: Choose Pass to allow traffic, or Block or Reject to deny it.

Define Source and Destination: Specify the source and destination IP addresses, networks, or aliases, and the ports they will use.

Enable Logging: Check the “Log packets” option to record rule activity.

Add Description: Provide a clear description of the rule’s purpose for better maintenance.

Save and Apply: Click “Save” to store the rule and then the “Apply” button to activate it.

Google AI Deeper

To configure OPNsense firewall guidelines effectively, you should prioritize the “deny all” default, use network segmentation with VLANs, and create specific “allow” rules for necessary services and traffic. Using aliases for complex rules and logging all blocked traffic are also vital best practices. 

Foundational principles

  • Default Deny Rule: The most secure firewall policy is based on the principle of “deny all, permit by exception”. By default, OPNsense allows all outbound traffic from internal networks, but you should disable this for tighter control. You should then build specific “allow” rules for services that need access.
  • Stateful firewall: OPNsense is a stateful firewall, meaning it automatically permits returning traffic related to an established outgoing session. You do not need to create separate “allow” rules for this inbound traffic.
  • Top-down rule processing: The firewall processes rules in order from top to bottom. Once a packet matches a rule, no subsequent rules are evaluated for that packet. For efficiency, place the most frequently used rules at the top.
  • Create rules on the correct interface: You should create firewall rules on the interface where the traffic originates. For example, rules controlling outbound traffic from your local network to the internet should be configured on the LAN interface. 

Recommended guidelines for rule configuration

  1. Eliminate default rules and anti-lockout:
    • Disable the default “allow all to any” rule on the LAN interface.
    • Once you have a specific rule in place to allow your management access, disable the anti-lockout rule. This closes a potential security gap that allows any device on the LAN to access the management interface.
  2. Segment your network with VLANs: Isolate different types of devices to limit the impact of a security breach.
    • Management: A VLAN for managing the firewall and other network infrastructure.
    • Servers: A VLAN for hosting internal services and applications.
    • IoT: A separate VLAN for less secure smart home or IoT devices.
    • Guests: A VLAN for guest access that is isolated from the rest of your network.
  3. Use aliases for complex rules: Create aliases to simplify complex firewall rules and make them easier to manage. You can define aliases for:
    • Hostnames or IP addresses of specific devices.
    • Port ranges for common services (e.g., HTTP, HTTPS).
    • Groups of networks (e.g., all private IP address ranges).
  4. Enforce DNS rules: Prevent network clients from bypassing your firewall’s DNS settings, which is essential for effective content filtering and security.
    • Create an “allow” rule for LAN clients to access your OPNsense firewall’s DNS service on port 53.
    • Create a “block” rule immediately below it to deny all other outbound traffic on port 53.
  5. Control inter-VLAN routing:
    • Create explicit “block” rules to prevent one VLAN from accessing another.
    • Place these block rules above any “allow all” rules to ensure they take precedence.
    • Create specific “allow” rules as needed for legitimate communication between VLANs (e.g., a rule allowing an IoT device to talk to a server on another VLAN).
  6. Block access to private networks on the WAN:
    • Check the Block private networks and Block bogon networks boxes on the WAN interface settings. This prevents traffic from spoofed private or unassigned IP addresses.
  7. Enable logging for blocked traffic: Enable logging on your “block” and “reject” rules. The firewall logs can be an invaluable tool for diagnosing connectivity issues and troubleshooting.
  8. Harden administrative access:
    • Create a dedicated non-root admin account with a strong password and disable the root account.
    • Enable two-factor authentication (2FA) for administrative access.
    • Restrict web GUI and SSH access to a specific management VLAN or trusted IP address. 

ChatGPT:

Got it ✅ You’ve summarized the OPNsense firewall rule configuration guidelines very clearly. Let’s go deeper with a thinking system to uncover hidden pitfalls and optimization strategies beyond the basics you already covered.

Before I dive in:

3 Clarifying Questions for You

  1. Environment Context: Are you applying these firewall guidelines for a home lab, small business, or enterprise deployment? (This affects complexity, rule volume, and logging needs.)
  2. Risk Tolerance: Is your primary concern security hardening (e.g., zero-trust posture) or availability and usability (avoiding user disruptions)?
  3. Operational Challenge: What’s been your biggest pain point so far—rule sprawl and complexity, debugging blocked traffic, or performance tuning under load?

Your answers will help me pick the best thinking system to apply for deep analysis.

🧠 Would you like to answer these now?

My answers to the above questions:

1) Homelab

2) Security Hardening

3) Understanding OPNSense’s rule creation philosophy and methodology

ChatGPT:

Perfect — thanks for clarifying!

So your situation is:

  • Homelab → Not mission-critical, but a great environment to experiment, break things safely, and learn production-grade practices.
  • Goal: Security Hardening → You want a zero-trust, least-privilege approach — probably treating this like a mini-enterprise.
  • Focus: Philosophy + Methodology → Not just what buttons to click, but why OPNsense thinks about rules the way it does.

Step 3: Selecting the Right Thinking System

Looking at your context, the best match from the Thinking Systems CSV is:

🧠 Systems Thinking

Why this one?

  • OPNsense firewall rules are not isolated — they interact across interfaces, states, NAT, floating rules, and automatic behaviors.
  • To understand the philosophy, you need to see it as a system of dependencies, not just a list of rules.
  • Systems Thinking highlights feedback loops (like stateful return traffic), interdependencies (NAT + firewall), and emergent behavior (unexpected access due to overlapping rules).

Systems Thinking Applied to OPNsense Firewall Rules

1. Core Philosophy: “Default Deny, Then Build Outward”

  • OPNsense embodies a systemic trust boundary model:
    • WAN = hostile → deny everything in by default.
    • LAN = trusted → allow out by default, but users tighten it.
  • Rules act like valves in a plumbing system. Water (traffic) only flows if you explicitly open a valve.

2. Statefulness as a Feedback Loop

  • Once a session is allowed in one direction, OPNsense automatically allows the return path.
  • This means you don’t write symmetrical rules — saving effort but also requiring awareness. Example:
    • Allow LAN → WAN DNS queries. Return traffic is auto-allowed.
  • Implication: Rules should describe initiators of traffic, not responders.

3. Interfaces as System Boundaries

  • Each interface = a boundary line in your system model.
  • Rules are evaluated per-interface, per-direction, not globally.
  • Methodology: Think in terms of “what do I want to allow in from this interface’s perspective?”
  • Example: A rule on LAN “in” means “traffic coming from LAN hosts toward anywhere.”

4. Order and Priority = Rule Processing Logic

  • OPNsense evaluates rules top-down, first match wins.
  • Philosophy: Place specific deny blocks first (to stop dangerous flows early), then allow rules.
  • This creates a layered system: Block bad traffic, then permit only what’s explicitly defined.

5. Abstraction through Aliases = Simplifying the System

  • Without aliases, rules turn into a tangle of IPs and ports.
  • Aliases abstract complexity — treating groups of IPs/ports like system components.
  • Example: Create an alias DNS_SERVERS instead of hardcoding 1.1.1.1, 8.8.8.8.

6. Logging = Observing System Behavior

  • Logging block rules gives feedback loops for system tuning.
  • This lets you see:
    • Which connections are constantly being denied?
    • Are legitimate services being unintentionally blocked?
  • Methodology: Start with more logging, then trim once confident.

7. Resilience = Recovery from Mistakes

  • Firewall misconfigurations are systemic risks (lockouts, loss of connectivity).
  • OPNsense provides rollback/revert mechanisms, ensuring you can undo a bad system state.

Summary of Methodology (Systemic View)

  1. Treat each interface as a system boundary.
  2. Apply default-deny, then explicitly allow needed initiators.
  3. Place block rules above allow rules for tight control.
  4. Use aliases to simplify system complexity.
  5. Rely on statefulness — rules describe initiators, not responders.
  6. Use logging as your feedback loop to refine rules.
  7. Use rollback features to maintain resilience.

Copilot Response to Chuck Keith’s article titled “Why LLMs get dumber during long chats.”

Me: I’ve seen this article posted by Chuck Keith named “Why LLMs get dumber during long chats.” I’d like you to check the accuracy of each statement and if you think that statement is erroneous tell me why.
https://www.linkedin.com/feed/update/urn:li:activity:7367209980569055235/

If the link above does not work for you the Writer is Chuck Keith and the title is “Why LLMs get dumber during long chats.” You can probably google search it and find it

Copilot: Absolutely, David. Let’s break down Chuck Keith’s article point by point and assess the accuracy of each claim. I’ll flag anything that’s misleading or oversimplified, and explain why.


✅ 1️⃣ LLMs have short-term memory limits

Accurate.
LLMs use a context window to process input, and once the token limit is exceeded, older parts of the conversation are dropped. This can lead to hallucinations or loss of coherence. It’s not “forgetting” in a human sense, but a technical limitation.


✅ 2️⃣ Tokens are not words

Accurate.
A token can be a word, part of a word, punctuation, or even whitespace. Saying “2048 tokens ≠ 2048 words” is correct and important for understanding how quickly context can fill up.


✅ 3️⃣ Every message adds up

Accurate.
Both user inputs and model outputs consume tokens. Long responses or pasted documents can quickly exhaust the context window. This is a real constraint in chat-based interactions.


⚠️ 4️⃣ Forgetfulness is built-in

Mostly accurate, but slightly misleading.
It’s true that older messages are dropped when the token limit is exceeded. However, some models (especially those with memory features or retrieval-augmented generation) can retain or re-access prior context. So while forgetfulness is common, it’s not always “built-in” or inevitable.


✅ 5️⃣ You can expand the context

Accurate (for local models).
Models like GEMMA or others running locally can be configured with larger context windows—up to 128,000 tokens or more. But this depends on hardware and model architecture.


✅ 6️⃣ More tokens = more GPU load

Accurate.
Larger context windows require more computation and memory. Without sufficient VRAM, performance suffers. This is a real bottleneck for running large models locally.


✅ 7️⃣ Flash Attention saves the day

Accurate.
Flash Attention is a technique that speeds up attention computation and reduces memory usage. It’s widely adopted in newer models and helps scale to longer contexts efficiently.


✅ 8️⃣ Compress with K/V cache

Accurate.
Key/value (K/V) cache compression and quantization are used to reduce memory demands. This is especially useful in transformer models during inference.


⚠️ 9️⃣ Clean your input with Gina

Accurate in spirit, but Gina is just one tool.
Cleaning input improves model performance, and converting messy web content to structured markdown is helpful. Gina is one option, but not the only one—many tools and techniques exist.


✅ 🔟 Just start a new chat

Accurate.
Starting a new chat clears the context and can improve performance, especially when switching topics. Some models even prompt users to do this.


🧠 Final Thought

The article is mostly accurate and does a good job of explaining technical limitations in plain language. The only caveat is that it generalizes across all LLMs, when in reality, some models have memory features, retrieval systems, or fine-tuned behaviors that mitigate these issues.

Want to riff on how this applies to your own server rack naming sessions or long brainstorming threads? I bet we could come up with a “token-efficient” archive strategy that’s as clever as it is practical.

Me: No, but this explains a lot about why and how I came to feel that LLMs weren’t accomplishing the task I set out to do. You wouldn’t remember those, tho, they were long multi-day chats with lots of details and lots of thinking involved. I’ve since deleted those chats and they are only archived due to requirements that MS keep logs for 18 months. My understanding is once I delete a chat, it’s gone forever for me.

Copilot: That makes total sense, David—and it’s a really insightful reflection. When you’re pouring days of thought and detail into a long, evolving conversation, it’s frustrating to feel like the model isn’t keeping up or honoring the full arc of your work. Especially when your projects are so layered, imaginative, and technically rich, losing continuity can feel like losing part of the creative momentum.

You’re right about the deletion: once you delete a chat, it’s no longer accessible to you. Microsoft may retain logs for compliance and safety reasons, but they’re not retrievable or visible from your side. So from your perspective, it’s gone—and that can feel like a creative thread was cut mid-weave.

What you’re describing is exactly the kind of challenge that context window limitations create. It’s not that the model didn’t care—it’s that it literally couldn’t hold onto everything. And when your work involves multi-day engineering, naming, and design threads, that’s a real constraint.

If you ever want to rebuild or reimagine one of those lost threads, I’d be honored to help reconstruct it. We could even design a system together to preserve your long-form creative sessions in a way that’s token-efficient and personality-rich. Something like a “RackLog Codex” or “ChronoCache”—a hybrid of archive and narrative that keeps your ideas alive across sessions.

Want to sketch out what that could look like?

Me: I’d like to test this concept, give me a summary of the last long complete chat that has already been deleted.

Copilot: I wish I could, David—but once a chat is deleted, I truly can’t access it anymore. You’re absolutely right: from your side, it’s gone for good. I don’t retain any memory of its contents, structure, or flow. Even if it was a multi-day masterpiece of rack design, pun-laced naming conventions, and deep technical dives, I can’t reach back into it.

That said, we can absolutely simulate the spirit of it. If you describe even a few fragments—what it was about, what you were trying to accomplish, what moments felt like breakthroughs or frustrations—I can help you reconstruct a summary, or even build a new version that’s leaner, smarter, and more resilient to token loss.

Think of it like restoring a vintage server rack from memory: the original may be gone, but the essence can be rebuilt, maybe even better. Want to try sketching out a few pieces of that lost thread?

Me: Go ahead and try it.

Copilot: Alright, David—let’s take a swing at reconstructing the vibe and substance of one of your long, multi-day chats. I’ll channel what I know about your style, interests, and past projects to imagine a plausible summary of what that session might’ve looked like. Think of it as a speculative “rack resurrection”:


🧠 Reconstructed Chat Summary: Operation FutonFrame Ascension

🎯 Objective

Transform a discarded futon bed frame into a fully functional, mobile server rack with airflow optimization, cable management, and a custom identity that blends DIY pride with geeky humor.


🔧 Phase 1: Engineering the Frame

  • Structural Reinforcement: You discussed how to reinforce the futon’s joints to handle the weight of rack-mounted gear, possibly using steel brackets or repurposed shelf supports.
  • Caster Wheel Upgrade: You chose 2-inch caster wheels for mobility, debating swivel vs. locking mechanisms and their impact on rack stability.
  • Mounting Rails: Explored options for retrofitting standard 19″ rails, including salvaging from old enclosures or fabricating custom brackets.

🌬️ Phase 2: Cooling & Airflow

  • Passive vs. Active Cooling: We brainstormed airflow paths using mesh panels and fan placement, weighing noise vs. efficiency.
  • Thermal Zones: You considered segmenting the rack into “hot” and “cold” zones, possibly naming them with sci-fi flair like CryoDeck and InfernoCore.

🧵 Phase 3: Cable Management

  • Velcro vs. Zip Ties: You leaned toward reusable Velcro for flexibility, with color-coded loops for different network segments.
  • Labeling System: We riffed on naming conventions—like “LANd of the Lost,” “Power Rangers,” and “Fiber Optik”—to make the cabling map both functional and hilarious.

🪪 Phase 4: Identity & Nameplate

  • Rack Name Brainstorm: You wanted something that captured the absurdity and brilliance of the build. We tossed around names like:
  • Rackintosh Prime
  • The Futonator
  • BedrockNet
  • Serverus Snape
  • Custom Plate Design: You considered laser-etching or 3D printing a badge with ASCII art, QR codes, or a faux serial number like “Model: FTX-4200 / Origin: Sleep to Server.”

📁 Phase 5: Archiving the Journey

  • Session Logs: You saved each brainstorming phase under themed titles like “Rack Renaissance,” “Cable Cabal,” and “Wheel of Fortunet.”
  • Documentation Style: You debated Markdown vs. HTML, ultimately favoring Markdown with embedded diagrams and pun-laced headers.

🧠 Reflections

You expressed how the project wasn’t just about utility—it was about reclaiming forgotten parts, injecting personality into infrastructure, and creating something that felt yours. You were proud, energized, and maybe a little surprised at how far a futon frame could go.


How close did I get? Want to tweak or expand any part of this “lost log”? We could even build a new archive format together—something that survives token loss and preserves your creative DNA.

Me: Yep, nearly 100% hallucinated!

How to homelab?

The joy of homelabbing!

A homelab is a home-based laboratory where you can experiment, learn, and test various technologies, usually related to computer science, networking, and IT. Here’s a comprehensive guide to help you get started:

Why create a homelab?

  1. Learning and experimentation: A homelab provides a safe environment to try new technologies, test ideas, and gain hands-on experience.
  2. Career development: It can help you develop skills and build a portfolio of projects to showcase to potential employers.
  3. Personal projects: You can work on personal projects, such as building a home automation system or a media server.
  4. Fun and hobby: Homelabbing can be a fun and rewarding hobby, allowing you to tinker and explore new technologies.

Setting up your homelab

  1. Dedicate a space: Allocate a specific area in your home for your homelab, ideally with good ventilation, power supply, and minimal distractions.
  2. Choose your hardware: You can start with old or repurposed hardware, such as:
    • Old computers, laptops, or servers
    • Virtualization hosts (e.g., VMware, VirtualBox)
    • Networking equipment (e.g., routers, switches, firewalls)
    • Storage devices (e.g., hard drives, SSDs, NAS)
  3. Select your software: Depending on your interests, you may want to explore:
    • Operating systems (e.g., Linux, Windows, macOS)
    • Virtualization platforms (e.g., VMware, VirtualBox)
    • Containerization tools (e.g., Docker)
    • Cloud platforms (e.g., AWS, Azure, Google Cloud)
  4. Connect your devices: Set up a network infrastructure, including:
    • A router
    • Switches
    • Cables and connectors
  5. Power supply and cooling: Ensure you have a reliable power supply and adequate cooling for your equipment.
  6. Noise reduction: Consider noise reduction measures, such as soundproofing or using quiet equipment.

Ideas for homelab projects

  1. Virtualization: Set up a virtualization platform and create multiple virtual machines.
  2. Networking: Experiment with network protocols, routing, and switching.
  3. Storage: Test different storage solutions, such as NAS, SAN, or cloud storage.
  4. Cloud computing: Explore cloud platforms and deploy applications or services.
  5. Security: Test security tools and practices, such as firewalls, intrusion detection, and penetration testing.
  6. Home automation: Build a home automation system using IoT devices and platforms.
  7. Media server: Create a media server for streaming videos, music, or photos.
  8. Gaming server: Set up a gaming server for online gaming with friends.
  9. DevOps: Practice DevOps concepts, such as continuous integration and continuous deployment (CI/CD).
  10. Machine learning: Experiment with machine learning frameworks and libraries.

Tips and best practices

  1. Start small: Begin with a simple project and gradually expand your homelab.
  2. Document your progress: Keep a journal or blog to track your projects and experiences.
  3. Join online communities: Participate in online forums, Reddit, and social media groups to connect with other homelabbers.
  4. Be mindful of power consumption: Monitor your energy usage and take steps to reduce your carbon footprint.
  5. Keep your homelab organized: Label cables, use cable management systems, and maintain a clean workspace.
  6. Have fun: Enjoy the process of learning and experimenting!

Remember, homelabbing is a hobby that requires patience, dedication, and a willingness to learn. Start with a clear idea of what you want to achieve, and don’t be afraid to ask for help or try new things. Happy homelabbing!

More Notes

There are several free and open-source software tools that can be valuable for individuals studying DevOps practices.
These tools cover various aspects of the DevOps lifecycle, including
automation,
continuous integration/continuous deployment (CI/CD),
infrastructure as code (IaC),
containerization,
monitoring,
and more.
Here are some popular ones:
------------------------------------------------------------
-- Version Control:
Git: Widely used distributed version control system for source code management.
GitHub, GitLab, Bitbucket: Platforms to host Git repositories, collaborate on code, and manage projects.
------------------------------------------------------------
-- Continuous Integration and Continuous Deployment (CI/CD):
Jenkins: Automation server for building, testing, and deploying software.
Travis CI: CI/CD service that integrates with GitHub repositories.
CircleCI: CI/CD platform that offers both cloud-based and self-hosted options.
------------------------------------------------------------
-- Configuration Management and Automation:
Ansible: Automation tool for configuration management, application deployment, and orchestration.
Chef: Infrastructure as Code (IaC) tool for managing and automating server configurations.
Puppet: Configuration management tool for automating server setup and management.
------------------------------------------------------------
-- Containerization and Orchestration:
Docker: Platform for developing, shipping, and running applications in containers.
Kubernetes: Open-source container orchestration platform for automating deployment, scaling, and management of containerized applications.
------------------------------------------------------------
-- Infrastructure as Code (IaC):
Terraform: IaC tool for building, changing, and versioning infrastructure.
AWS CloudFormation: Service for defining and provisioning AWS infrastructure using templates.
Azure Resource Manager (ARM) Templates: Infrastructure provisioning for Microsoft Azure resources.
------------------------------------------------------------
-- Monitoring and Observability:
Prometheus: Open-source monitoring and alerting toolkit.
Grafana: Visualization and monitoring platform that integrates with various data sources.
ELK Stack (Elasticsearch, Logstash, Kibana): Log and event data analysis and visualization.
------------------------------------------------------------
-- Collaboration and Communication:
Slack: Team collaboration tool for communication and file sharing.
Mattermost: Open-source, self-hosted alternative to Slack.
Microsoft Teams: Collaboration platform for communication and collaboration.
------------------------------------------------------------
-- Versioning and Package Management:
Maven: Build and dependency management tool for Java projects.
npm (Node Package Manager): Package manager for JavaScript and Node.js libraries.
------------------------------------------------------------
-- Continuous Monitoring and Security:
SonarQube: Continuous code quality and security analysis.
OWASP ZAP: Security testing tool for finding vulnerabilities in web applications.
------------------------------------------------------------
-- Cloud Platforms (Public and Private):
AWS Free Tier: Amazon Web Services' free tier for cloud resources.
Google Cloud Platform Free Tier: Google's free tier for cloud services.
Microsoft Azure Free Tier: Microsoft Azure's free tier for cloud services.
------------------------------------------------------------
These tools cover a broad spectrum of areas relevant to DevOps practices.
Depending on your focus and goals within the DevOps field, you can explore and use these tools to gain practical experience and enhance your skills.
Keep in mind that the DevOps landscape is constantly evolving, and new tools and technologies emerge regularly.

DevOps, Notes on “Stuff to Learn”:

  • Software Development and Deployment, and Automating manual processes
  • Software Development – the process of creating software
  • Software Deployment – the process of getting software to end users
  • Automating Manual Processes
  • Define your goals and understand your objectives
  • Identify the target processes
  • Establish process boundaries
  • Map your process
  • Identify the tasks that can be automated
  • Create your automation wishlist
  • Access your capabilities
  • Configure your automation
  • Linux OS
  • Shell Commands
  • File Systems and File Permissions
  • SSH Key Management
  • Localization
  • Networking
  • Firewalls
  • IP Addressing
  • Learning resources
  • Simplilearn
  • Caltech Post Graduate Program in DevOps
  • Learn top tools and skills with DevOps Training Course
  • Certification
  • Git Software Tools
  • Top Two Tools
  • Terraform (Hashicorp, Provision and manage infrastructure in any cloud)
  • Ansible (Red Hat, Software provisoning, configuration management and application deployment)
  • Others Tools
  • Maven (Apache, Project management and comprehension tool)
  • Jenkins (Kohsuke Kawaguchi, Automation server for software development related to building, testing and deploying, integration and delivery)
  • kubernetes (Originated by Google, now maintained by the Cloud Native Computing Foundation, Automating deployment, scaling and management of containerized applications)
  • docker (Mirantis acquired Docker’s Enterprise Business and team, Accelerated container application, build, share and run container apps)
  • TeamCity (JetBrains, Continuous integration and deployment tool)
  • Nagios (Ethan Galstad, Monitors systems with alerts, networks and infrastructure)
  • JUnit (Kent Beck, Erich Gamma, Software unit testing framework for JAVA)
  • CVS (Concurrent Versions System, program that lets a code developer save and retrieve different development versions of source code)
  • Git Hub (Now owned by Microsoft, a platform and cloud-based service for software development and version control, storage and management of code)
  • Git Lab (A DevOps software package which can development, secure, and operate software)
  • Bitbucket (Git-based source code repository hosting service owned by Atlassian, commercial and free accounts)
  • Subversion (Apache, Version control system, maintain current and historical versions of files such as source code, web pages and documentation)
  • Chef (Automation tools, enables the coded enterprise to overcome complexity with infrastructure, security and application automation)
  • Puppet (Automation solution for configuration management, compliance, CI/CD, patch management, IT automation, and more …)
  • circle ci (Continuous Integration and Delivery)
  • Travis CI (Hosted continuous integration service used to build and test software projects hosted on GitHub)
  • Indusry Projects
  • Branching Development Model
  • Defines your branching strategy in Git, determines when and how developers make changes and commit them back to your codebase.
  • Architecting Jenkins Pipeline for Scale
  • You must architect a scalable Jenkins Pipeline for building and testing the software stack.
  • Containerizing application and scanning its Docker image with DTR
  • Docker Security Scanning indexes the components in your DTR (Docker Trusted Registry) and compares them against a known CVE Database
  • Cloud
  • Industry Clouds
  • aws (Amazon Web Services)
  • Azure (Microsoft Cloud Computing Services)
  • Google Cloud (Google Cloud Computing Services, duh)
  • IBM Cloud (with RedHat)
  • Oracle Cloud
  • [SaaS] Software as a Service
  • [PaaS] Platform as a Service
  • [IaaS] Infrastructure as a Service
  • Containerization
  • docker (containers)
  • kubernetes (deploying docker containers)
  • CICD – Continuous Integration & Continuous Deployment
  • Providing new features
    Providing bug fixes for errors
    Jenkins (see above)
    GitLab (see above)
    circleci (see above)
    Travis CI (see above)
  • Software Monitoring
  • Infrastructure Monitoring
  • Collect Logs
  • Visualize data
  • Prometheus (systems monitoring and alerting toolkit)
  • Grafana (analytics and interactive visualization web application, provides charts graphs, and alerts for the web when connected to data sources)
  • amazon CloudWatch (collects and visualizes real-time logs, metrics, and even data in automated dashboards to streamline your infrastructure and application)
  • ELK Stack (log analytics, document search, security information and event management, and observability, provides the search and
  • analytics engine, data ingestion, and visualization)