https://hiwa.se/ IT consultant working across infrastructure, systems, cloud and security, designing, running and improving the platforms a business depends on. Based in Stockholm, through my own company Roj IT. en Mon, 12 Oct 2026 19:46:45 GMT https://hiwa.se/articles/veeamon-tour-nordics-2026 https://hiwa.se/articles/veeamon-tour-nordics-2026 Sun, 11 Oct 2026 00:00:00 GMT Backup The Nordic stop of the VeeamON Tour put a reel-to-reel drive in the lobby and spent the day talking about autonomous agents touching production data. The distance between those two things is the whole point. https://hiwa.se/outside/bilbesiktning-when-and-where https://hiwa.se/outside/bilbesiktning-when-and-where Tue, 06 Oct 2026 00:00:00 GMT Stockholm Swedish vehicle inspection is less bureaucracy than it looks, once you know when yours is actually due. The intervals for a new car, where to look the date up instead of guessing, and which chain I ended up at. https://hiwa.se/tutorials/baseline-before-patching-ubuntu-servers https://hiwa.se/tutorials/baseline-before-patching-ubuntu-servers Tue, 29 Sep 2026 00:00:00 GMT Linux Patching rarely breaks a server. Not knowing what working looked like is what turns a fifteen minute reboot into a lost afternoon. A repeatable pre-check, what each command actually catches, and how to read the diff afterwards. https://hiwa.se/tutorials/sizing-a-server-room-from-the-load-up https://hiwa.se/tutorials/sizing-a-server-room-from-the-load-up Mon, 28 Sep 2026 00:00:00 GMT Infrastructure Space is rarely the constraint. Power is, cooling is the same number counted twice, and the floor is what quietly kills the project. A repeatable way to assess a room before anyone orders hardware. https://hiwa.se/articles/reading-the-veeam-console-icons https://hiwa.se/articles/reading-the-veeam-console-icons Thu, 24 Sep 2026 00:00:00 GMT Backup Veeam Backup & Replication says a great deal through small pictures, and most of us learn five of them. The set is not a list to memorise. It is object, place and state, combined. Learn the states and the rest reads itself. https://hiwa.se/outside/gorvaln-atervinningscentral https://hiwa.se/outside/gorvaln-atervinningscentral Tue, 22 Sep 2026 00:00:00 GMT Stockholm A recycling centre is infrastructure like any other. Sorted inputs, a throughput problem, and one very large machine solving it. Also free, if you live in the right ten municipalities. https://hiwa.se/tutorials/cisco-c8375-e-g2-sdwan-initial-setup https://hiwa.se/tutorials/cisco-c8375-e-g2-sdwan-initial-setup Wed, 16 Sep 2026 00:00:00 GMT Networking The initial setup of a Catalyst 8300 G2 secure router as a Cisco Catalyst SD-WAN edge: what to prepare before you unbox it, the console session, the mode switch, onboarding into SD-WAN Manager, and how to tell it actually worked. https://hiwa.se/articles/litespeed-enterprise-root-escalation https://hiwa.se/articles/litespeed-enterprise-root-escalation Tue, 15 Sep 2026 00:00:00 GMT Security A critical privilege-escalation flaw in LiteSpeed Web Server Enterprise lets a low-privilege site user escape CageFS and reach root. Upgrade to 6.3.7 build 2 (yes, even if you already did 6.3.7), then check what ran before you did. https://hiwa.se/articles/critical-vmware-vcenter-vulnerabilities-cve-2026-59309-cve-2026-59310 https://hiwa.se/articles/critical-vmware-vcenter-vulnerabilities-cve-2026-59309-cve-2026-59310 Tue, 04 Aug 2026 00:00:00 GMT Security Two 9.8-scored, pre-authentication, network-reachable flaws in the virtualization control plane, with no workaround. Patch vCenter first, ESXi next, and tighten management access while you do it. https://hiwa.se/tutorials/dirty-frag-cve-2026-43284-how-to-check-and-secure-your-linux-systems https://hiwa.se/tutorials/dirty-frag-cve-2026-43284-how-to-check-and-secure-your-linux-systems Mon, 18 May 2026 00:00:00 GMT Linux A zero-day local privilege escalation in the Linux kernel with a public exploit and no vendor patches yet. Check whether your systems carry the vulnerable modules, apply the modprobe workaround, and verify it holds. https://hiwa.se/tutorials/how-to-set-up-cisco-meraki-9300-cloud-managed-switches https://hiwa.se/tutorials/how-to-set-up-cisco-meraki-9300-cloud-managed-switches Sun, 17 Aug 2025 00:00:00 GMT Networking No console cable, no management VLAN by hand, no getting started without the internet. How the Catalyst 9300-M is meant to be brought online, where it differs from a classic Catalyst, and the Dashboard tools that replace the CLI. https://hiwa.se/articles/essential-windows-server-run-commands https://hiwa.se/articles/essential-windows-server-run-commands Sun, 03 Aug 2025 00:00:00 GMT Windows Server A cheat sheet of the Run-dialog commands, MMC consoles and admin tools worth knowing on Windows Server 2016 through 2025, with the two-page PDF to keep next to the keyboard. https://hiwa.se/tutorials/automate-your-workflow-with-scripts https://hiwa.se/tutorials/automate-your-workflow-with-scripts Sun, 08 Oct 2023 00:00:00 GMT Linux The fundamentals of shell scripting: what a script is, where scripts earn their keep, the shebang line, and a first hello_world.sh from an empty file to a running program. https://hiwa.se/articles/exploring-your-digital-footprint-what-it-is-and-why-it-matters https://hiwa.se/articles/exploring-your-digital-footprint-what-it-is-and-why-it-matters Sat, 07 Oct 2023 00:00:00 GMT Security Every online move leaves a trail: posts, searches, mail, purchases, apps, location. What makes up that trail, who collects it, why it doesn't go away, and the four settings that shrink it. https://hiwa.se/tutorials/comparing-text-files-with-diff-command https://hiwa.se/tutorials/comparing-text-files-with-diff-command Thu, 06 Jan 2022 00:00:00 GMT Linux Two files, one typo, and no patience for reading them side by side. What diff prints, how to read a / c / d and the angle brackets, and the unified format you will meet in every pull request.