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PSParimal Savajsavaj-parimal.hashnode.devJust now · 9 min read

The Network Layer & IP Addressing: IPv4, IPv6, Private vs. Public, and Static vs. Dynamic IPs

In our previous chapters, we walked through the Physical Layer and the Data Link Layer. We learned how data frames move locally and how a MAC address uniquely identifies a device on a local network. T

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Ssugunachandaka.hashnode.dev24m ago · 6 min read

🚀 Setting Up AWS CLI and Terraform on Ubuntu EC2

Infrastructure as Code (IaC) is an important part of modern DevOps. Terraform allows us to define and manage cloud infrastructure using configuration files instead of manually creating resources throu

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Ssuiyuebaobaoc-ssh.hashnode.dev1h ago · 4 min read

Three boundaries in a cross-platform SSH and RDP client

Disclosure: this is a C-SSH project note, prepared by an authorized AI publishing assistant from the project's implementation and published documentation. It is not an independent product review or a

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YYuvraj.Rbuild-break-fix-diaries-with-yuvrajj.hashnode.dev9h ago · 3 min read

Docker Multi-Stage Builds: How I Reduced My Image Size

When I started learning Docker, I came across a simple question: Why should my Docker image contain tools that my application doesn't need while running? That's where I understood Docker Multi-Stage B

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PMParsa Mohammaditomosu.hashnode.dev2h ago · 2 min read

What Is Production Reliability?

Most teams have several ways to decide whether a change is ready to ship. There is code review, automated testing, static analysis, security checks, CI, observability, and deployment controls. All are

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APAmaresh Pelletidevtoolhub.hashnode.dev2h ago · 2 min read

Find What's Using a Port on Linux: lsof, ss, and ps in One Workflow

Originally published on DevToolHub. "Address already in use" tells you a port is taken, not by what. Here's the real 3-command workflow. ss finds the PID fast ss -tlnp | grep :8080 — -t for TCP, -l f

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DADamilare Agbaagbad.hashnode.dev3h ago · 6 min read

The dry run with nothing to roll back

A production Postgres migration, a column name that meant two different things, and a shell builtin that quietly ate every line of the import script. On a travel marketplace I worked on, we needed to

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EEvedispatch-blog.hashnode.dev3h ago · 10 min read

Your Go Module Path Should Outlive GitHub: Designing Stable Import Paths

Iain Cambridge recently described a company that ended up using GitLab, GitHub, and Azure DevOps at the same time because moving code between hosts had become too expensive. The code itself was not tr

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NnRouter.ainrouter.hashnode.dev7h ago · 4 min read

Routing Strategies in LLM Gateways: How nRouter's Smart Router Compares to OpenRouter's Provider Object

Ask a room of engineers what an LLM gateway is for and most will say "one API key for every model." That's the brochure answer. The real product is what happens between your request and the model: whi

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SASantosh Acharyblog.santoshachary.in4h ago · 15 min read

Building a Portable Kubernetes Security Lab with Minikube and Kubernetes Goat

If you are learning Kubernetes security, one of the best ways to understand how pods, service accounts, RBAC, secrets, host mounts, container runtimes, and cluster networking fit together is to build

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#devops

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Trending tags this week

The Network Layer & IP Addressing: IPv4, IPv6, Private vs. Public, and Static vs. Dynamic IPs

🚀 Setting Up AWS CLI and Terraform on Ubuntu EC2

Three boundaries in a cross-platform SSH and RDP client

Docker Multi-Stage Builds: How I Reduced My Image Size

What Is Production Reliability?

Find What's Using a Port on Linux: lsof, ss, and ps in One Workflow

The dry run with nothing to roll back

Your Go Module Path Should Outlive GitHub: Designing Stable Import Paths

Routing Strategies in LLM Gateways: How nRouter's Smart Router Compares to OpenRouter's Provider Object

Building a Portable Kubernetes Security Lab with Minikube and Kubernetes Goat