Practical Guides for Sysadmins: Linux, Windows, Networking & DevOps
Step-by-step tutorials, troubleshooting checklists and plain-English explainers for people who run servers, networks and desktops.
New here?
Start Here
When something is broken
Popular Troubleshooting Guides
- Fix “wmic is not recognized” on Windows 11
- Nginx 502 Bad Gateway: What It Really Means and How to Fix It
- MySQL/MariaDB Connection Refused: Checklist That Fixes It
- Cron Job Not Running? Checklist Before Blaming cron
- DNS Not Resolving on Linux: Checklist That Actually Works
- Cloudflare 522 on a Coolify VPS: How I Found the Real Cause
Fresh from the terminal
Latest Posts
- How to Set a Different PHP Version for a Subfolder in cPanel
MultiPHP Manager assigns a version per document root, not per folder. cPanel documents an .htaccess handler method for a sub-folder, with limits: suPHP only, not PHP-FPM, not PHP Selector sites. - PHP Version Keeps Changing Back in cPanel: Causes and Fixes
Deleting .htaccess fixed a site stuck on an old PHP version, and a day later the problem came back. Why that pattern happens, what can rewrite the handler, and what to ask your host. - cPanel PHP Version Not Changing? Which Setting Wins (MultiPHP, PHP Selector, .htaccess)
You set PHP 8.4 in cPanel and the site runs 8.2. The system default, MultiPHP Manager, PHP Selector and .htaccess handler lines can all decide the version. The documented order and how to check. - How to Change the PHP Version in cPanel (MultiPHP Manager and PHP Selector)
cPanel has two common tools for PHP versions, MultiPHP Manager and the CloudLinux PHP Selector. How each works, how they interact, and how to confirm the change really took effect. - How to Update PHP Version in WordPress Safely (Step by Step)
Updating PHP can take a working WordPress site down if a plugin does not support the new version. A safe order: check, back up, test, change, verify, and how to roll back. - Composer Detected Issues in Your Platform: PHP >= 8.3.0 Required While cPanel Shows PHP 8.4
A site kept running an old PHP even though cPanel was set to 8.4, and Composer stopped it with a platform check error. What the message means, what can override the setting, what worked, and what to ask your host.
Hi, I’m Maruthi Vishnu
I’m a Systems Administrator and DevOps Engineer with 7+ years of hands-on IT experience. Started my career at Revalsys Technologies as a System Administrator — managing Windows Server, Active Directory and enterprise infrastructure. Then deepened my sysadmin expertise at vSplash Techlabs, before moving into DevOps and Cloud at Ratnam Solutions Private LTD where I work with AWS infrastructure today. sysadmin.co.in is where I document everything I learn, break, and build — so you don’t have to figure it out the hard way.
Stay in the Loop
No spam. Just real writeups, tools and field notes -straight to your inbox