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Guides from the NOC

Written from running the hardware — what breaks, why, and the command that fixes it.

142 posts matching “troubleshooting” · Clear

Troubleshooting Google Safe Browsing Warning: How to Get Your Site Delisted

Site flagged as 'Dangerous' or 'Deceptive' in Chrome? Learn how to check Safe Browsing status, request a Google review, and get delisted fast.

17 July 2026 · 7 min · 22 views
WordPress WordPress Scheduled Posts Not Publishing? Fix WP-Cron

Scheduled WordPress posts stuck on 'Missed Schedule'? Learn why WP-Cron fails to fire and how to fix it for good with a real server cron job in cPanel.

17 July 2026 · 5 min · 8 views
WordPress WordPress Thumbnails Not Generating: Causes and the Fix

WordPress not creating featured image or thumbnail sizes on upload? Learn the real causes - Imagick, memory limits, permissions - and how to fix each one.

17 July 2026 · 5 min · 18 views
WordPress WordPress Keeps Logging You Out? Here's the Real Fix

WordPress logging you out after login or every few minutes? Learn the real causes - cookie domain, salts, server time - and how to fix each one for good.

16 July 2026 · 6 min · 33 views
WordPress WordPress Settings Not Saving? Fix the max_input_vars Limit

WordPress page builder or WooCommerce settings not saving fully? Learn how the PHP max_input_vars limit silently drops form fields and how to raise it.

16 July 2026 · 6 min · 13 views
WordPress WordPress "There Has Been a Critical Error": Causes and the Fix

Seeing 'There has been a critical error on this website' in WordPress? Learn why it happens and fix it step by step, even if wp-admin is locked out too.

16 July 2026 · 5 min · 14 views
Troubleshooting 401 Unauthorized Error: Causes and How to Fix It

Getting a 401 Unauthorized error on your site, API, or webmail? Learn the real causes - bad tokens, stripped headers, clock drift - and fix each one.

16 July 2026 · 6 min · 17 views
Troubleshooting MySQL Server Has Gone Away: Causes and How to Fix It

Getting 'MySQL server has gone away' on WordPress or a PHP app? Learn the real causes - timeouts, packet size, crashes - and fix each one step by step.

16 July 2026 · 6 min · 19 views
Troubleshooting 405 Method Not Allowed Error: Causes and How to Fix It

Getting a 405 Method Not Allowed error on your site or API? Learn which layer - Apache, Nginx, Cloudflare, or WordPress - is blocking the request and fix it.

16 July 2026 · 7 min · 37 views
Troubleshooting 504 Gateway Timeout: Causes and How to Fix It

Seeing a 504 Gateway Timeout on your site or API? Learn which layer - Cloudflare, Nginx, Apache, or PHP-FPM - is stalling, and fix each cause step by step.

16 July 2026 · 6 min · 18 views
Troubleshooting MySQL Slow Query Log: Find and Fix Queries Slowing Your Site

Site feels sluggish but CPU looks fine? Learn how to enable the MySQL slow query log, read it with mysqldumpslow, and fix the queries actually slowing you down.

16 July 2026 · 6 min · 20 views
Troubleshooting 502 Bad Gateway Error: Causes and How to Fix It

Seeing a 502 Bad Gateway error on your site? Learn what's really failing behind the scenes - PHP-FPM, LiteSpeed, Cloudflare - and fix it step by step.

16 July 2026 · 6 min · 35 views
Troubleshooting ERR_SSL_PROTOCOL_ERROR: Causes and the Fix

Getting ERR_SSL_PROTOCOL_ERROR in Chrome? Learn why the browser can't even start a TLS handshake and how to fix it on cPanel, Nginx, Apache, or Cloudflare.

15 July 2026 · 6 min · 17 views
Troubleshooting ERR_SSL_VERSION_OR_CIPHER_MISMATCH: Causes and the Fix

Getting ERR_SSL_VERSION_OR_CIPHER_MISMATCH in Chrome? Learn why it's a TLS handshake failure, not a bad cert, and fix it on cPanel, Nginx, or Cloudflare.

15 July 2026 · 8 min · 21 views
Troubleshooting Decoding Email Bounce-Back Errors: 550, 552, 554 & More

Email bounced back with a strange SMTP code? Learn what 550, 552, 554, and 421 errors mean and the exact fix for each, from cPanel and WordPress mail.

15 July 2026 · 6 min · 12 views
Hosting How to Find and Read Error Logs in cPanel

Learn where cPanel stores error logs, how to enable PHP logging, and how to read raw access logs to actually diagnose what's breaking your site.

15 July 2026 · 5 min · 21 views
Troubleshooting SSL_ERROR_RX_RECORD_TOO_LONG: Causes and the Fix

Getting SSL_ERROR_RX_RECORD_TOO_LONG in Firefox? Learn why your browser thinks port 443 isn't serving SSL, and fix the Apache, Nginx or Cloudflare cause.

15 July 2026 · 7 min · 23 views
Hosting cPanel Spam Filters: Set Up Apache SpamAssassin Right

Learn how cPanel's Apache SpamAssassin spam filter works, tune the score threshold, and fix both too much junk mail and false positives.

15 July 2026 · 5 min · 15 views
Troubleshooting 400 Bad Request: Request Header Or Cookie Too Large - Fix It

Getting a 400 Bad Request 'Request Header Or Cookie Too Large' error? Learn why it happens and how to clear it in the browser, WordPress, and on the server.

15 July 2026 · 7 min · 33 views
WordPress WordPress "Maximum Execution Time Exceeded" Error: The Fix

Getting 'Fatal error: Maximum execution time exceeded' in WordPress? Learn why PHP times out mid-request and how to fix it safely in cPanel or via WP-CLI.

14 July 2026 · 6 min · 12 views
Troubleshooting 413 Request Entity Too Large: Fix It Fast

Getting a 413 Request Entity Too Large error on upload or import? Learn which layer - Nginx, Apache, or Cloudflare - is blocking it and how to fix each one.

14 July 2026 · 6 min · 28 views
VPS Running Docker on a VPS: Setup and Common Fixes

Learn how to install Docker on your VPS the right way, run your first container, and fix the permission, port, and disk-space issues that trip people up.

14 July 2026 · 6 min · 21 views
Hosting cPanel Inode Limit Exceeded: Find and Fix It Fast

Hitting your cPanel inode limit even though disk space looks fine? Learn what's really eating your file count and how to clear it safely, step by step.

14 July 2026 · 6 min · 9 views
Troubleshooting MySQL Table Marked as Crashed: How to Repair It Safely

MySQL table marked as crashed? Learn how to confirm it, repair it safely via phpMyAdmin or SSH with mysqlcheck, and stop it from happening again.

14 July 2026 · 6 min · 18 views