PinnedBalancing Act: Tales of an Overloaded System AdministratorHey everyone! Today, I want to share the story of John, a hardworking system administrator who finds himself navigating the turbulent waters of an overloaded workload. …Overload3 min readOverload3 min read
Feb 9Play Videos on Android AutoAnyone who has small children knows how useful it is to be able to play videos in the car to distract them. Recently, I was at the dealership to “unlock” videos on my car’s multimedia center, which is based on Android Auto. …Android Auto5 min readAndroid Auto5 min read
Nov 7, 2022Create a Private RegistryA private registry can be useful for storing container images for your applications in an internal, controlled (and potentially more secure) infrastructure. In this article I will show you how to create a secure and SSL/TLS ready private registry that can be used to store containers in general, as well…Private Registry2 min readPrivate Registry2 min read
Nov 7, 2022OpenShift Operator Hub on Restricted NetworksOpenShift’s Operator Lifecycle Manager (AKA Operator Hub) is designed to work with internet access. But, sometimes we have to deal with an environment that does not have internet access (disconnected environment), thus preventing us from installing Operators. To make things harder, some operators need related images (declared on its CSV)…Openshift 45 min readOpenshift 45 min read
May 26, 2022OpenWRT Mesh 802.11sI have 3 WiFi routers at my place. Each one had it’s own 5GHz WiFi network. Well, I know this was not the best scenario, but since it’s working, you know, let it be. WiFi Routers My routers are: TP-Link Archer C7 v5 TP-Link Archer C50 v4 TP-Link TL-WDR4300 v1 The routers…Mesh14 min readMesh14 min read
May 10, 2022Building a Home Server for Study PurposesSome of my co-workers sometimes ask me how I set up a home server for study purposes and do advanced labs. As this has been a recurring subject, I decided to write this content to support those who want to follow this path. A home server can be very powerful…Home Server5 min readHome Server5 min read
May 9, 2022Check Spectre and Meltdown Vulnerabilities — The Easy WaySometimes we need to quickly check whether a Linux environment is vulnerable to flaws exploited by known versions of Specter and Meltdown exploits. In practice we have 2 ways to check this: manually or automatically. This article will cover the second way. Kernel Vulnerabilities As any system, Linux can be affected by…Spectre9 min readSpectre9 min read
Apr 5, 2022Using RAM Cache to Speed Up Linux Disk PerformanceProblems with Cloud IOPS? Or maybe your Hard Disks are not fast enough for your needs? In this article I will teach you how to create a Linux Tuned Profile specially prepared to increase disk access performance, through the use of RAM cache. Introduction In some cases the capacity of hard…Cache4 min readCache4 min read
Mar 30, 2022Replace Expired Red Hat Satellite CertificatesThis one took me a whole day to figure out. There are plenty o documentation about this, but none of them explain how to proper build and replace an expired CA and self signed Satellite certificate. …Satellite4 min readSatellite4 min read
May 3, 2021AWS pfSense VPN ServerWell, this one may be a little late for some. But, I thik it can come in handy for others, as the informatiom I will share can be a way to fix or understand a existing problem. Once again my IT friends ask me for help, as they know my…Ikev210 min readIkev210 min read
