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Practical guides for managing Linux servers, control panels, cloud infrastructure, security, and email systems.

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Guides from the field

73 published guides
A key icon with a blocked mark representing a cPanel license verification failure
KBcPanel

cPanel Invalid License or Cannot Read License File: How to Fix It

Why cPanel suddenly shows Invalid License or Cannot Read License File, usually tied to an IP change or blocked verification traffic, and how to fix it correctly.

4 min read
An envelope icon with a clock representing a stuck or frozen Exim mail queue
KBEmail

Exim Mail Queue Stuck or Frozen in cPanel: How to Diagnose and Clear It Safely

How to diagnose why an Exim mail queue in cPanel is stuck or frozen, find the actual source instead of just deleting messages, and clear it without it filling back up.

4 min read
Database icon with a broken connection spark representing a lost MySQL connection
KBDatabases

MySQL Server Has Gone Away: How to Fix It on a WordPress or cPanel Server

Why WordPress throws MySQL server has gone away on a cPanel server, covering connection timeouts, oversized queries and table corruption, with the fix for each cause.

4 min read
Two server racks connected by a broken gateway link representing a 502 error
KBServer Performance

Nginx 502 Bad Gateway on WordPress: Diagnosing a PHP-FPM Crash

A practical guide to diagnosing a 502 Bad Gateway on a WordPress server running Nginx and PHP-FPM, covering worker exhaustion, timeouts and OOM kills.

4 min read
Cloud server disk snapshot process alongside a traditional backup tool
CLCloud Infrastructure

Cloud Server Backups: Snapshots vs Traditional Backup Tools

A practical comparison of cloud provider snapshots and traditional backup tools for cloud servers, and why a reliable backup strategy usually needs both, not one or the other.

5 min read
Plesk backup configuration screen with remote storage and schedule settings
KBPlesk

Configuring Reliable Automated Backups in Plesk

How to configure reliable automated backups in Plesk, covering the Backup Manager, the pleskbackup CLI utility, remote storage configuration and how to catch a silent backup failure.

5 min read
Support team dashboard showing a spike in tickets during a mass outage
SMServer Management

Handling a Support Ticket Surge During a Mass Outage

A practical playbook for handling a sudden support ticket surge during a mass outage, covering triage rules, status page communication and what to do once service is restored.

4 min read
Checklist for vetting a hosting support provider before signing a contract
SMServer Management

How to Vet a Hosting Support Provider Before You Sign

A practical vetting checklist for choosing an outsourced hosting support provider, covering the questions to ask, the trial to request and the red flags worth walking away from.

5 min read
Server migration from cPanel to Plesk shown as a data transfer between two servers
KBPlesk

Migrating From cPanel to Plesk Without Downtime

A step by step plan for migrating from cPanel to Plesk without downtime, covering DNS preparation, data transfer, verification on the new server and a safe cutover sequence.

4 min read
Cloud server sizing dashboard showing CPU and memory utilization over time
CLCloud Infrastructure

Right-Sizing a Cloud Server Without Over-Provisioning

How to right-size a cloud server using real historical utilization data rather than guesswork, covering the metrics that matter and the tools each major provider offers.

5 min read
Cloud server and dedicated server infrastructure compared side by side
CLCloud Infrastructure

Cloud Server vs Dedicated Server: Real Cost and Performance Comparison

A practical cost and performance comparison between cloud servers and dedicated servers, covering pricing structure, CPU and disk behavior, scaling and who actually manages the box.

6 min read
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