Every once in a while I get asked why I don’t have an out-of-office message for my email or voice mail. Truth is, I’ll often monitor my email even when I’m out, though I often practice good operations discipline by not responding. Just as intermittent problems with computer systems are hard to deal with, a […]

I’ve found that things that are free of charge are often not a good deal. TANSTAAFL, or “There ain’t no such thing as a free lunch.” You’re always paying in some way. Maybe the piece of hardware is marked up more to cover the development cost of the “free” software that comes with it. Perhaps […]

I was setting up VMware vRealize Automation’s Active Directory connections the other day and I needed the public SSL certificate for the AD DCs to authenticate correctly. You can use OpenSSL to get that information. I used a Linux shell but this should be do-able from a Mac or with OpenSSL installed on Windows, too. […]

I just got a new iPhone Xs Max. I had an iPhone 6s which I liked a lot, but it’s been a few years and with more travel I thought I’d enjoy having a better device with me. There are a few things that bit me in the duff. Some two-factor authentication (2FA) apps like […]

by George Whittaker Introduction Linux system administration encompasses managing the software and hardware of Linux systems, which can be complex, especially for those new to Linux or managing multiple systems. Fortunately, Webmin, a web-based interface, simplifies many of the routine tasks involved in maintaining a healthy Linux system. This article explores how Webmin can be […]

by Bryan Lunduke What is DevOps? How does it relate to other ideas and methodologies within software development? Linux Journal Deputy Editor and longtime software developer, Bryan Lunduke isn't entirely sure, so he asks some experts to help him better understand the DevOps phenomenon. The word DevOps confuses me. I'm not even sure confuses me […]

by Kyle Rankin Take a tour through the best infrastructure I ever built with stops in architecture, disaster recovery, configuration management, orchestration and security. Working at a startup has many pros and cons, but one of the main benefits over a traditional established company is that a startup often gives you an opportunity to build […]

by Andy Carlson How to provide robust monitoring to low-end systems. When running a critical system, it's necessary to know what resources the system is consuming, to be alerted when resource utilization reaches a specific level and to trend long-term performance. Zabbix and Nagios are two large-scale solutions that monitor, alert and trend system performance, […]

Microsoft has launched a public preview of pre-upgrade validation checks for Azure Database for PostgreSQL flexible servers. This managed service automates database maintenance, but major version upgrades often face risks from hidden compatibility issues. The new feature allows for proactive identification of potential blockers before the actual migration process begins. Source

The Cybersecurity and Infrastructure Security Agency has expanded its Known Exploited Vulnerabilities catalog to include three new security flaws. These vulnerabilities affect Cisco Catalyst SD-WAN Manager, Google Chrome's V8 engine, and Arista Extensible Operating System. Federal agencies must implement remediations or mitigations by June 23, 2026, to protect their environments from active threats. Source

Fortinet, Ivanti, and SAP have issued urgent security updates to address several critical vulnerabilities that could lead to remote code execution and unauthorized data access. Fortinet's patch targets a command injection flaw in its FortiSandbox products that allows unauthenticated attackers to execute commands via malicious HTTP requests. This vulnerability, tracked as CVE-2026-25089, affects multiple versions […]

Amazon Web Services has released the M9g and M9gd Elastic Compute Cloud instances, marking the debut of the custom Graviton5 processor. This next-generation chip features 192 cores and is specifically engineered to handle the high demands of autonomous AI agents and real-time reasoning. The hardware represents a significant architectural shift by supporting DDR5 memory and […]