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Set a Static IP on Ubuntu Without Losing Access

A stable address is usually safest as a DHCP reservation. When the host itself must own a static address, identify the active renderer, choose an address outside the dynamic pool, validate Netplan syntax, use rollback-capable apply, and verify link, route, DNS, and remote access separately.

legacy article

Identify a Device by IP Address on Linux Safely

An IP address is a starting clue, not a complete device identity. Correlate Linux routing and neighbour data with DNS, DHCP or cloud inventory, then use the smallest authorized Nmap probe that answers the remaining question.

legacy article

Add reCAPTCHA to a Form Without Trusting the Browser

A reCAPTCHA widget is only the browser half of the control. This implementation verifies each short-lived, single-use token on the server, checks the expected hostname, handles failures safely, and layers reCAPTCHA with ordinary anti-abuse controls.

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Cloud Technologies

Amazon Web Services ( AWS ) JSON Curl Django Django Rest Framework Top Cloud service providing platforms

legacy article

Find and Fix Broken Links in WordPress

A broken-link report is a triage queue, not a delete list. This workflow chooses an appropriate scanner, validates ambiguous results, repairs the source or redirect, preserves intentional removals, and verifies the rendered site.

legacy article

Fix “No Address Associated with Hostname” on Linux

The error means the resolver could not return a usable address for the requested name and address family. Diagnose the same NSS path the application uses before editing `/etc/hosts`, changing DNS, or flushing caches.

legacy article

Create an AWS Free Tier Account Safely

New AWS customers now choose a Free account plan or Paid account plan; the old blanket “12 months free” description no longer applies to accounts opened after July 15, 2025. Learn what each plan permits, how credits expire, and which security and billing controls to configure before launching anything.

legacy article

Launch a Secure Amazon EC2 Instance Step by Step

Launch an Amazon Linux 2023 EC2 instance without relying on stale console screenshots: choose the right image and architecture, design network access, protect credentials, require IMDSv2, verify health, and control ongoing cost.

legacy article

Monitor CPU, Memory, I/O and Processes on Linux

A high load average, low “free” memory, or busy disk is a clue—not a root cause. Use interval-based Linux tools to separate CPU saturation, memory reclaim, swap, storage latency, network load, process behavior, and cgroup pressure before restarting or killing anything.

legacy article

Grant User Access in Google Analytics 4

GA4 access is additive and inherited: an account-level role flows into every property, and a lower-level assignment cannot take that power away. Start at the narrowest property scope, grant the smallest role that completes the job, and verify effective access.

legacy article

Fix apt Stuck at 0% Connecting on Ubuntu

When apt pauses at “0% Connecting,” the last displayed address is evidence, not a diagnosis. Determine whether DNS, IPv6 routing, IPv4 routing, a proxy, TLS, a captive portal, the selected mirror, or an unsupported Ubuntu release is failing before changing system-wide address selection.

legacy article

Fix dpkg and apt Lock Errors Safely

An apt or dpkg lock usually means another package operation is already protecting the package database. Do not delete the lock file. Identify the owner, let healthy updates finish, terminate only a genuinely frozen frontend, then complete pending configuration and dependency repair.

legacy article

Add a Google Map and Marker to a Contact Page

A useful contact map does more than draw a pin. This implementation uses Google Maps JavaScript API’s current advanced marker, restricts the browser key, keeps the address usable without JavaScript, and avoids the blank-map mistakes that waste an afternoon.

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