Troubleshooting

Maximize website speed! Learn how optimizing PHP/MySQL, modern Apache (Event MPM), and client-side caching boosts performance, resource limits, and when to upgrade RAM.

Linux server load high? Diagnose CPU, memory & I/O bottlenecks (`top`/`iotop`). Fix PHP/MySQL, handle abuse & malware for better performance.

Defend Apache vs Slowloris with `mod_reqtimeout`. Guide: install on EA3/EA4 & set `RequestReadTimeout` for header/body to drop slow attacks.

This guide provides a quick reference for Imunify360, covering its features, installation, command-line usage, uninstallation, and troubleshooting common conflicts.

Protect your Apache server from Slowloris attacks. Learn how to install and configure mod_qos, set up connection limits, and integrate with CSF.

Linux disk full? Learn to find large files/dirs (`df`, `du`, `find`) & high inode usage. Guide covers cleanup for common paths & cPanel specifics.

iptables can act as your server’s gatekeeper, deciding which network traffic is allowed in, out, or through your server.

This guide details Qmail, a modular mail server. Learn to manage mail queues, investigate spam, and troubleshoot common issues for Plesk and InterWorx email environments.

Search bots blocked? Troubleshoot `robots.txt` issues & CSF IP blocks (ModSecurity). Guide: check perms, unblock IPs & whitelist trusted bots.

Learn to fix the Apache startup error “Failed to set a watch for httpd.service’s PID file: No space left on device” by checking disk space or increasing inotify watches.

Learn to pinpoint processes consuming swap memory. This guide explains how to use top and a custom script to identify culprits for efficient memory troubleshooting.

GNU Screen: A terminal multiplexer for multiple sessions. Detach, reattach, share & manage windows with commands & `ctrl+a` key bindings.