Reuben KOOME

ICT

[LearnKube @learnk8s]

K8sQuest is a local Kubernetes learning game with 50 progressive challenges where you fix broken clusters using kubectl with real-time monitoring, progressive hints, and post-mission debriefs running on kind

➤ https://t.co/hQAuna3pSl

[OSO @osodevops]

My Deep Dive into Kubernetes Init Containers: When Order Matters https://t.co/47T9qQZpaV

[Reuben KOOME @reubenkoome]

I am going through this awesome hands-on course on #kubernetes #cka by @mmumshad @KodeKloudHQ
https://t.co/UZGTtsCHUn

[Christiane Amanpour @amanpour]

“Attenborough is an intelligent young man, but he should not be used as an interviewer because his teeth are too big.” The legendary David Attenborough recounts the rather harsh feedback he got from the boss when he first stepped in front of the camera…

[LearnKube @learnk8s]

This tutorial shows how to add Prometheus, Grafana, Alertmanager, custom metrics, ServiceMonitors, dashboards, and alert rules to an EKS cluster through GitOps

➜ https://t.co/IsGGHZbRqC

[Kubernetes @kubernetesio]

Kubernetes v1.36: Admission Policies That Can't Be Deleted - https://t.co/2uA6jIKH5n #Kubernetes

[Kubernetes with Naveen 🇮🇳 @NaveenS16]

#DevOps Interview ProTips:

Junior DevOps: 👉 I used Terraform coz it's industry standard."❌

Senior DevOps: 👉 We chose Terraform over CloudFormation coz our roadmap included a multi-cloud expansion, and we needed a provider-agnostic DSL to maintain team velocity.

Don't give tutorial answers. Give architectural ones.

[Learn with Cisco @LearningatCisco]

Get ready for #CML 2.10 (because this one's a BIG one).

Don't miss this expert-led tour for a first look at CML 2.10's new features before it ships.

📆 April 23, 2026, at 9 a.m. PT

👉 Register free now: https://t.co/UbdEoTZsn3

[Reuben KOOME @reubenkoome]

@KingTunde_SZN 36

[Dhanian 🗯️ @e_opore]

Load Balancing Architecture

[NASA @NASA]

LIVE: Watch with us as the Artemis II astronauts make their closest approach to the Moon, traveling farther from Earth than ever before. https://t.co/Zpy7GdTqA8

[The White House @WhiteHouse]

EARTHSET.
April 6, 2026.

Humanity, from the other side. First photo from the far side of the Moon. Captured from Orion as Earth dips beyond the lunar horizon. Photo: NASA

[Today in History @TodayinHistory]

Historic!

This is the highest quality video ever taken of the moon!

[Sunil Gurjar, CFTe @sunilgurjar01]

This 50-minute lecture by Jeff Bezos will teach you more about business than a 2-year MBA program:

[Reuben KOOME @reubenkoome]

@Suryanshti777 "Think"

[Suryansh Tiwari @Suryanshti777]

Stop learning Python like a tutorial addict.

Start thinking like a Computer Scientist. 🧠🐍

I’m giving away Think Python (3rd Edition) – Allen B. Downey
The book that builds real fundamentals, not copy-paste skills.

If you’re serious about mastering Python the right way, this is for you.

To get:
1️⃣ Follow MUST so I can dm
2️⃣ Like + RT
3️⃣ Comment “THINK”

[Ivan Velichko @iximiuz]

SysAdmin 101: Port Forwarding 🧐

Making a service available on a different port without reconfiguring or restarting it may look like black magic, but it's not! Practice using:

- socat https://t.co/dALlzb8BXq
- netcat https://t.co/8TZaFg3A2c
- iptables https://t.co/wQ0nDTOO5q

[Dhanian 🗯️ @e_opore]

Linux Service Management

1. Introduction

→ Linux uses services (also called daemons) to run background tasks such as networking, logging, databases, and web servers.
→ Service management controls starting, stopping, restarting, and monitoring these services.
→ Modern Linux systems use systemd as the default service manager.

2. What Is systemd

→ systemd is the first user-space process started by the kernel.
→ It always runs as PID 1.
→ It manages services, sockets, devices, mounts, and system states.

→ Key benefits:
 → Faster boot times
 → Parallel service startup
 → Dependency management
 → Centralized logging

3. Service Units

→ systemd manages resources using unit files.
→ Unit files define how services behave.

→ Common unit types:
 → .service — system services
 → .socket — socket-based activation
 → .target — group of services
 → .mount — filesystem mounts

→ Service unit files are stored in:
 → /lib/systemd/system/
 → /etc/systemd/system/

4. Checking Service Status

→ View the status of a service:
 → systemctl status service_name

→ Check if a service is active:
 → systemctl is-active service_name

→ List all running services:
 → systemctl list-units --type=service

5. Starting and Stopping Services

→ Start a service:
 → sudo systemctl start service_name

→ Stop a service:
 → sudo systemctl stop service_name

→ Restart a service:
 → sudo systemctl restart service_name

→ Reload configuration without stopping:
 → sudo systemctl reload service_name

6. Enabling and Disabling Services

→ Enable service at boot:
 → sudo systemctl enable service_name

→ Disable service at boot:
 → sudo systemctl disable service_name

→ Check if enabled:
 → systemctl is-enabled service_name

7. Service Dependencies

→ systemd automatically handles dependencies between services.
→ Services declare dependencies inside unit files.

→ Common dependency directives:
 → Requires= — hard dependency
 → Wants= — soft dependency
 → After= — startup order
 → Before= — reverse startup order

8. Targets (Runlevels Replacement)

→ systemd replaces traditional runlevels with targets.

→ Common targets:
 → https://t.co/BRGo66NISl — GUI mode
 → https://t.co/5qknxDvsYA — CLI multi-user mode
 → https://t.co/KifAXNQMfV — single-user rescue mode
 → https://t.co/pduNP410WW — reboot state

→ Check current target:
 → systemctl get-default

→ Change default target:
 → sudo systemctl set-default https://t.co/5qknxDvsYA

9. Creating a Custom Service

→ Steps to create a service:
 → Create a .service file in /etc/systemd/system/
 → Define service behavior
 → Reload systemd
 → Start and enable the service

→ Reload systemd:
 → sudo systemctl daemon-reexec
 → sudo systemctl daemon-reload

10. Logs and Troubleshooting

→ systemd uses journalctl for logging.

→ View service logs:
 → journalctl -u service_name

→ View recent logs:
 → journalctl -xe

→ Logs are centralized, structured, and searchable.

11. Legacy Service Management

→ Older systems used SysVinit scripts.
→ Commands included:
 → service service_name start
 → chkconfig service_name on

→ systemd provides backward compatibility.

12. Best Practices

→ Enable only necessary services.
→ Disable unused background services.
→ Monitor service failures regularly.
→ Use systemctl status and journalctl for diagnostics.
→ Avoid running services as root unless required.

13. Tip

→ Linux service management ensures background processes run reliably.
→ systemd simplifies startup, dependency handling, and monitoring.
→ Mastering systemctl is essential for Linux administration and DevOps work.

✅ Grab the Linux Mastery Ebook:
https://t.co/mCaIRlvD0A

[Save the Elephants @ste_kenya]

It is with deep sadness that we announce the death of Save the Elephants’ founder, Dr. Iain Douglas-Hamilton, aged 83, who passed away peacefully as the sun set in Nairobi last night.

Read more: https://t.co/CB7V2hpglR

📸 Indianapolis Zoo

[Sawyer Merritt @SawyerMerritt]

NEWS: SpaceX's @Starlink has reached a new milestone in Kenya, recording 19,460 active users as of September 2025, marking the satellite provider’s highest subscriber count since entering the Kenyan market.