Guides
Plain-English explanations behind the tools: how things work, common mistakes, and practical tips you can use today.
8 min readYour Cron Job Isn't Running: A Debugging Checklist That Starts With the Boring StuffNine real reasons a cron job silently fails, in the order you should check them, from the percent-sign gotcha to the missing newline.8 min readPlanning a Cloud Network: Choosing CIDR Blocks You Won't Regret in a YearHow to pick VPC and subnet sizes, why cloud providers reserve addresses, and a sizing table with real usable-host counts.8 min readWhen You Prepay Matters More Than How Much: Numbers From a 50-Lakh Home LoanWorked numbers showing how timing, a small EMI round-up, and monthly extras change interest on a 20-year, 8.5% loan.7 min readSeven Popular Colours That Fail Contrast on White, and the Darker Shades That PassReal hex codes, real ratios and a tested replacement for each, so you can keep the look and meet WCAG AA.6 min readumask Explained: Why Your New Files Are 644 and How to Change ThatThe simple subtraction behind default Linux permissions, with the four umask values you'll actually meet.7 min readThe Three Weeks a Year India–US–UK Meetings Quietly BreakWorked examples of how daylight saving changes the gap between IST, London and New York, and what to do with recurring calls.7 min readStop Your Page Jumping: Using aspect-ratio and Image Dimensions to Fix Layout ShiftHow reserving space for images and video prevents layout shift, with the CSS aspect-ratio property and the old padding trick compared.7 min readWhy Your Campaign Traffic Shows Up as 'Unassigned' (and the UTM Habits That Prevent It)How analytics tools sort campaign links into channels, why inconsistent medium values break reports, and a naming scheme to copy.6 min readCatching Config Drift: Using a Diff to Find Out Why Staging Works and Production Doesn'tA practical routine for comparing configuration files, environment exports and lists, including how to clean noisy input first.6 min readEditing Your Own Draft With a Word-Frequency Report: A Practical WalkthroughHow to use counts of repeated words and phrases to tighten a draft, with a before-and-after style example and a few rules of thumb.6 min readWriting Deadlines in Working Days Without Starting an ArgumentHow to word notice periods, delivery promises and SLAs so everyone counts the same days, with a checklist and examples.6 min read'Permissions Are Too Open': Fixing SSH Key and Web Server Permission ErrorsA symptom-by-symptom guide to permission errors on Linux, with the exact modes that fix them and the reasons behind each.6 min readHow Cron Schedules Really Work (and the Mistakes That Bite)A plain-English guide to the five cron fields, step values, the day-of-month trap and how to test a schedule before it goes live.6 min readSubnetting Made Simple: What the Slash Number Actually MeansUnderstand CIDR notation, subnet masks, usable hosts and how to size a network without memorising tables.6 min readLinux File Permissions Explained: Reading rwx and Octal Like a ProWhat 755, 644 and 600 really mean, how read, write and execute differ for files and folders, and which settings are safe.6 min readColour Contrast and WCAG: What the 4.5:1 Rule Really MeansHow contrast ratios are calculated, what AA and AAA require, and practical ways to fix low-contrast text without ruining your design.7 min readShould You Prepay Your Loan? How Extra Payments Cut InterestHow reducing-balance loans work, why early extra payments save so much, and how to decide between prepaying and investing.6 min readCounting Business Days Correctly: Weekends, Holidays and Edge CasesWhy working-day maths trips people up, how to treat the start and end dates, and what changes with Friday-Saturday weekends.5 min readHow to Compare Two Versions of a Text (and Actually Trust the Result)A practical guide to diffing documents and code: what line-by-line comparison shows, its limits, and tips for cleaner results.6 min readKeyword Density: Does It Still Matter for SEO?An honest look at keyword density, why there is no magic percentage, and how to use word-frequency analysis to improve your writing.6 min readUTM Tagging Best Practices for Clean AnalyticsHow to name sources, mediums and campaigns consistently so your Google Analytics reports stay readable, with examples and common mistakes.5 min readAspect Ratios Explained: Sizing Images and Video Without DistortionWhat aspect ratio means, how to calculate a missing dimension, and which ratios fit YouTube, Instagram, TikTok and print.6 min readScheduling Meetings Across Time Zones Without the HeadachePractical advice for finding fair meeting times across countries, handling daylight saving changes and avoiding common scheduling mistakes.