How-To

A quick reference for the cut command, covering how to split text by a delimiter and extract specific fields. Useful for parsing CSV, log files, and other delimited data from the command line.

A Perl-based utility that emulates a busy server by spawning multiple threads performing varied IO workloads. It uses direct IO and cache invalidation to benchmark raw disk performance in a multitasking environment.

Learn how to configure BIND9 views to serve different DNS records to internal and external clients from a single server. This guide walks through zone files, ACLs, recursion control, and the $include directive to keep your setup clean and secure.

A quick walkthrough of using mtr in report mode to capture packet loss data across network hops. Learn how to run a 30-cycle test and read the output to isolate where loss is occurring.

A quick walkthrough of enabling, configuring, and querying the MySQL general log to capture every statement that hits your server.

A quick reference for viewing and applying MySQL GRANT statements, including the specific privileges needed for routine and view management.