Articles
System temperature as a dimension of performance
Sensor tools can provide highly variable data from CPUs, GPUs, and a variety of sources. We look at some tools to verify the temperature of components on diverse hardware.
Getting your virtual machine dimensions right
Massive, performance-hungry VMs require proper handling to meet their dynamic requirements. We give you some rules to help size these monsters properly.
File Integrity Checks with AIDE
If an attacker gains access to systems by working around your defenses, you need to discover the attacker's tracks in good time, at least to mitigate the further risk of damage. We show you how to monitor changes to files with the Linux AIDE tool.
Explore automation-as-code with Ansible
The Ansible automation tool makes it really easy to implement IT scenarios as code. We use structured YAML code to roll out Ansible in the form of AWX.
Migrate your Git repositories to Gitea
Nothing is forever, not even a Git server. After the purchase of GitHub by Microsoft, I found a new home in Gitea for version control.
Storage across the network with iSCSI and Synology DiskStation Manager
The iSCSI protocol lets you access block storage across a network connection. We show you how to connect a Debian 12 system with a Synology storage device over iSCSI.
Reducing the Attack Surface in Windows
The sum total of all possible points of attack can be defined as the attack surface, and you need to take every opportunity to minimize it to the extent possible. Windows has built-in rules that minimize the attack surface; they simply need to be enabled.
Aggregate alerts from various monitoring systems
The free Alerta fields alerts from several monitoring systems and delivers them in a web GUI or at the command line.
Create a high availability VM with DRBD9 and Reactor
DRBD9 and DRBD Reactor create a Linux high-availability stack for virtual instances with replicated storage comparable to the classic Corosync and Pacemaker solution.
Server validation with Goss
Goss checks your servers, delivers a machine health status report, and allows you to evaluate the test results from a full-blown monitoring system. We show you how to get started with this free tool and how to run a variety checks on Linux and Windows computers.
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