Tag: Linux

1. Using Huge Pages for MySQL on Linux

   Jan 21, 2025

   Huge pages reduce the number of page table entries the CPU has to manage for a large InnoDB buffer pool, lowering the rate of expensive translation lookaside buffer misses. Anyone who confuses Transparent Huge Pages with classic huge pages risks exactly the latency spikes they were trying to avoid.

   Read more

2. NTP and chrony: Configuring Time Synchronization on Linux Correctly

   Jan 15, 2025

   A single second of clock drift is enough to break TLS handshakes, corrupt log correlation, and confuse database replication. NTP synchronizes system clocks across a network, and chrony is the modern reference implementation for that on Linux. This article shows how NTP works, how to configure and monitor chrony, and how to secure synchronization against manipulation.

   Read more

3. Disk Space Analysis with du and df

   Jan 11, 2025

   A disk that suddenly fills up stalls deployments and databases, often without warning. df instantly tells you which filesystem is affected, du -sh sorted by size pinpoints the exact culprit, and with the right toolkit you can reliably clean up logs, caches, and old releases before the server goes down.

   Read more

4. File Integrity Monitoring with AIDE: Reliably Detecting Unauthorized Changes

   Jan 9, 2025

   File Integrity Monitoring with AIDE detects unauthorized changes to critical system and configuration files before they become an undetected security incident. Setting up baseline, rules and automated checks correctly delivers a reliable early warning system that simultaneously satisfies central compliance requirements.

   Read more

5. Creating Custom systemd Services for PHP Applications

   Jan 3, 2025

   Anyone keeping PHP workers and queue consumers alive with nothing more than nohup or a screen session risks silent outages after every server reboot, deployment, or crash. A properly written systemd unit file with a clear restart policy, a dedicated service user, and automatic journald integration makes PHP background processes resilient, observable, and production-ready, without needing extra tools like Supervisor or Monit.

   Read more