SysAdmin

Traceroute is one of the most misunderstood tools in a network engineer’s toolkit. This guide walks through how traceroute actually works, how to read the output correctly, and how to avoid the common pitfalls that lead to wrong conclusions.

Configure the soft and hard stack limits for the Apache user in /etc/security/limits.conf to prevent segmentation faults caused by insufficient stack space.

A practical guide to tuning Linux TCP/IP kernel parameters for high-speed, high-latency broadband connections, covering buffer sizing, timeout adjustments, SYN flood protection, and congestion control selection.

A quick fix for the SSL Library Error 185090057 that appears when restarting Apache, caused by a malformed PEM certificate file. Learn how to validate and correct the certificate format to get your server back online.

Apache Tuner is a Perl script that analyzes your Apache configuration and system resources to surface quick performance wins. Run it, read the suggestions, and tune your MPM, KeepAlive, and worker settings with confidence.

Filter Apache access logs by IP address and date using awk. A quick, practical approach to pulling specific entries without loading a full log viewer.