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29 September 2026

  • 08:0708:07, 29 September 2026 Thomas-Krenn & Veeam Hardened Repository Hardware Setup (hist | edit) [11,601 bytes] Aranzinger (talk | contribs) (Created page with "This article describes how to set up and update the RA1212-AIEPN+ server (Gigabyte MZ33-AR1). It guides you through setting up the hardware RAID in the BIOS and updating the BMC firmware and the BIOS, using the available methods for each. == Creating the hardware RAID in the BIOS == <gallery> file:Gigabyte Start Screen.png|Start the server and '''click''' '''[Del]''' or '''[F2]''' depending on the server to enter the '''BIOS'''. file:BIOS Standardansicht.png|In the BIOS...")

28 September 2026

  • 10:5610:56, 28 September 2026 Supermicro BMC Safety Instructions September 2026 (hist | edit) [1,390 bytes] Aranzinger (talk | contribs) (Created page with "In '''September 2026''', Supermicro published a security bulletin on '''CVE-2026-33197'''. There is a potential security vulnerability that could allow an attacker to generate additional UEFI boot entries and to boot into the UEFI shell. The pre-boot environment can be manipulated by using shell scripts, for example, to overwrite Secure Boot memory values or to execute malware early in the system boot process. == Overview == {| class="wikitable" |+ !Security vulnerab...")

19 September 2026

  • 15:4215:42, 19 September 2026 LPI Security Essentials (hist | edit) [11,020 bytes] Wfischer (talk | contribs) (Created page with "'''LPI Security Essentials''' is the entry-level certification in the security field offered by the Linux Professional Institute (LPI). In this wiki article, we outline the detailed learning objectives for the LPI Security Essentials exam (Version 1.0, Exam Code 020-100).<ref>[https://www.lpi.org/our-certifications/exam-020-objectives/ Security Essentials Exam 020 Objectives] (www.lpi.org)</ref> == Topic 1: Security Concepts == {| class="wikitable" |+ !Subject Area !Wei...")

25 August 2026

  • 13:3213:32, 25 August 2026 LVM basics (hist | edit) [7,751 bytes] Aranzinger (talk | contribs) (Created page with "The '''Logical Volume Manager''' (LVM) allows an abstracted and flexible administration of data storage of a computer system. Compared to the traditional method using partitions, another higher '''abstraction layer''' is introduced that should enable a simpler and more efficient administration and configuration of the data carrier. For example, multiple hard drives can be combined into a '''''logical volume''''' and used as a single data storage unit. Another simplificat...")
  • 08:5108:51, 25 August 2026 Collecting System Statistics on Ubuntu using serverstats (hist | edit) [4,443 bytes] Aranzinger (talk | contribs) (Created page with "For the analysis of operating system statistics, there are numerous opportunities. For a '''rough analysis''', it is enough to take a closer look at the most important components. The '''rrd'''-used tool '''serverstats''' offers a fast and easy access to statistics and graphs about load, processes, memory and hard drive. In the following article, it is described how to install and configure serverstats on Ubuntu 14.04 LTS. == Installation == The package ''serverstat...")

21 August 2026

  • 10:1210:12, 21 August 2026 Linux Performance Analysis with collectd (hist | edit) [5,631 bytes] Aranzinger (talk | contribs) (Created page with "collectd is a daemon that collects system statistics in structured form. The data is in rrd format and can be used for '''performance analysis''' and '''reporting''' of the resource consumption. For the visual representation of the collected collectd-data, there are multiple '''frontends''', which are developed largely independently of collectd. In the following, it is explained how to install and configure collectd on Ubuntu 14.04 LTS. We will also take a look at fr...")
  • 09:0109:01, 21 August 2026 Linux Network Analysis with mtr (hist | edit) [8,031 bytes] Aranzinger (talk | contribs) (Created page with "The network diagnosis tool '''mtr''' (My Traceroute) combines the functionality of the tools traceroute and ping in an individual program. It can be used as text-based ncurses program or as graphical GTK+ program. [http://www.bitwizard.nl/mtr/ mtr] has been developed by BitWizard B.V., which is a Dutch company. == Function == The program is callled up on the command line together with a host as parameter. For the "Host" field,...")

20 August 2026

  • 12:5712:57, 20 August 2026 UEFI Secure Boot (hist | edit) [11,175 bytes] Aranzinger (talk | contribs) (Created page with " Secure Boot is a part of the UEFI specification that should guarantee the authenticity of important software parts. Critical parts of the firmware, such as the OS loader, should only be executed if they have been authorized to do so in advance by a trusted institution. Therefore, rootkits are excluded that take root even before the operating system (OS) boots. Cryptographic mechanisms ([https://de.wikipedia.org/wiki/Elektronische_Signatur Signaturen]) avoid that untru...")

18 August 2026

  • 12:0812:08, 18 August 2026 Safety Information on Intel Products 2026.3 IPU (hist | edit) [5,559 bytes] Aranzinger (talk | contribs) (Created page with "In August '''2026''', Intel published new security advisories on different Intel products as part of the IPU 2026.3. Some of these safety instructions require '''firmware updates'''. In this article, you will find an excerpt and hints on these security advisories as well as information on where to find updates on Thomas-Krenn products. == Affected systems == * Intel Xeon processors * Intel Core processors * Intel Atom processors * Intel Pentium processors * Intel Cele...")
  • 09:1509:15, 18 August 2026 AMD Safety Vulnerabilities - August 2026 (hist | edit) [6,177 bytes] Aranzinger (talk | contribs) (Created page with "On '''August 11th, 2026''', AMD published security bulletins with safety vulnerabilities. '''AMD-SB-3033'''<ref>[https://www.amd.com/en/resources/product-security/bulletin/amd-sb-3033.html SEV Firmware Arbitrary Code Execution] (www.amd.com/en/resources/product-security)</ref> and '''AMD-SB-7064'''<ref>[https://www.amd.com/en/resources/product-security/bulletin/amd-sb-7064.html Trusted Platform Module (TPM) Reference Code Errata] (www.amd.com/en/resources/product-securit...")

11 August 2026

  • 09:1209:12, 11 August 2026 OPNsense plugins (hist | edit) [6,322 bytes] Aranzinger (talk | contribs) (Created page with "The functions of the Open Source firewall OPNsense can be extended by multiple '''plugins'''. The following table shows the plugins available with the corresponding version numbers (OPNsense version 25.1.1): {| class="wikitable" !Plugin !Version !Description |- |os-acme-client |4.11 |ACME Client |- |os-apcupsd |1.2_3 |APCUPSD - APC UPS daemon |- |os-beats |1 |Send logs, network, metrics and heartbeat to Elasticsearch |- |os-bind |1.34_2 |BIND domain name service |-...")

6 August 2026

  • 12:4512:45, 6 August 2026 Update VMware ESXi (hist | edit) [40,553 bytes] Aranzinger (talk | contribs) (Created page with "Updates for VMware ESXi can be easily installed via the command line, even for the free version of the ESXi hypervisor. In this example, we explain how to install updates via command line using VMware ESXi 6.7.<ref>[https://kb.vmware.com/articleview?docid=2008939 “esxcli software vib” commands to patch an ESXi 5.x/6.x host] (kb.vmware.com, VMware Knowledge Base Artikel 2008939)</ref> == Download updates == In the following knowledge base article about VMware, y...")
  • 11:3011:30, 6 August 2026 IPMI configuration for Supermicro systems (hist | edit) [2,969 bytes] Aranzinger (talk | contribs) (Created page with "This article describes tools for the configuration of IPMI modules for Supermicro systems. Alternatively, the ipmitool can also be used if the server is operated on Linux (see also IPMI Configuration under Linux using ipmitool). == IPnMAC == With this tool (on Linux IPMICFG, see below), it is possible to set the IP address and the MAC address locally on the server. It must be taken into consideration that the correct MAC...")
  • 07:5107:51, 6 August 2026 Software tools for IPMI at a glance (hist | edit) [4,342 bytes] Aranzinger (talk | contribs) (Created page with "For IPMI, there are multiple software tools for different purposes and operating systems. In the following, there is an overview of useful '''IPMI tools'''. == Linux == === IPMItool === [http://ipmitool.sourceforge.net/ IPMItool] is already included in multiple Linux distributions. You can now communicate with IPMItool in two different ways with IPMI BMC's: * via network by using a so-called LAN channel. In this case, only IPMItool is required. * local...")

5 August 2026

  • 07:4807:48, 5 August 2026 Terraform with Proxmox VE tutorial (hist | edit) [17,572 bytes] Aranzinger (talk | contribs) (Created page with "This article is about the first use of Terraform with Proxmox VE. You will receive all the necessary information beginning with the installation of Terraform to the first deployment of a Proxmox resource (VM). == Overview == Once setup is complete, the basic workflow in Terraform with Proxmox VE is as follows: # '''Install Terraform''' # '''Create Proxmox API-Token:''' for Terraform to access Proxmox VE # '''Create Terraform Provider:''' Communicates Terraform that...")

31 July 2026

  • 11:0511:05, 31 July 2026 IPMI/BMC Security Vulnerability in Older Implementations (hist | edit) [5,808 bytes] Aranzinger (talk | contribs) (Created page with "== Introduction == In July 2025, attention was once again drawn to a vulnerability that has been known for many years in various implementations of the Intelligent Platform Management Interface (IPMI) and the underlying Baseboard Management Controllers (BMCs). Security researchers have identified numerous management interfaces that are available via Internet, which remain vulnerable to an attack on the authentication mechanism. The vulnerability allows, with certain req...")

30 July 2026

  • 09:4409:44, 30 July 2026 Copy-on-Write principle in ZFS (hist | edit) [6,631 bytes] Aranzinger (talk | contribs) (Created page with "'''Copy-on-Write''' is an optimization principle of data processing in which changes are not made directly to the existing data set, but are always written to a new copy. As the cornerstone of the ZFS file system's storage strategy, CoW—in combination with transaction groups—ensures that an interrupted write operation can never result in an inconsistent file system. This is why ZFS stands out from classic file systems that overwrite the data completely...")

29 July 2026

24 July 2026

  • 07:4507:45, 24 July 2026 Remove a Proxmox node from the cluster and add it again (hist | edit) [6,229 bytes] Aranzinger (talk | contribs) (Created page with "This article shows how to remove a node from a [https://www.thomas-krenn.com/de/wiki/Proxmox_VE?xtxsearchselecthit=1 Proxmox] Ceph cluster and, if necessary, add it back. == Requirements == * There must be no VMs or containers on the node to be removed. Therefore, it is recommended that you migrate them to another node beforehand (see the "Preparation" section for more information). * Please note that your cluster has enough free storage space to distribute the data o...")

23 July 2026

  • 13:3613:36, 23 July 2026 Windows Server Core Licensing (hist | edit) [7,166 bytes] Aranzinger (talk | contribs) (Created page with "Since '''Windows Server 2016''', '''Microsoft''' relies on '''core licensing'''. In this article, all important information, that is required for the '''licensing of Windows Server''', is included. It is possible to test the latest server version up to 180 days for free. A corresponding download can be found in [https://www.microsoft.com/de-de/evalcenter Microsoft Evaluation Center].<br/><br/>{{#widget:Imagebox-left|link={{...")
  • 09:1409:14, 23 July 2026 Administration of RAID with MDADM (hist | edit) [9,974 bytes] Aranzinger (talk | contribs) (Created page with "'''This article includes the general procedure of creating and administrating an array with MDADM.''' MDAMD (multiple disk administration) is a program that helps with the administration of a Software RAID in Linux. With this program, RAID-arrays can be created, configured, monitored and deleted. MDADM is released as free software under the GNU General Public License (GPL). MDADM creates so-called multiple devices (short MD) from different block devices (such as an ent...")

22 July 2026

21 July 2026

20 July 2026

  • 14:3714:37, 20 July 2026 Installation of Open WebUI with Ollama (hist | edit) [6,802 bytes] Aranzinger (talk | contribs) (Created page with "'''Open WebUI''' provides a browser-based user interface for local KI-models. In connection with Ollama, user can select models and use them via webbrowser. This article shows the installation of Open WebUI as docker container. Ollama is operated natively on the same Ubuntu server. <!-- Add after testing: * Used Ubuntu-Version: * Used Open-WebUI-Version: * Used Ollama-Version: * Used Docker-Version: * Used Testhardware: --> == Requirements == These instructions are...")
  • 12:2812:28, 20 July 2026 Activation of NVIDIA vGPU for RDS Sessions on Windows Server (hist | edit) [2,602 bytes] Aranzinger (talk | contribs) (Created page with "On Windows Server, applications within an RDS session may not use the assigned NVIDIA vGPU. Instead, Windows uses Microsoft Basic Render Driver by default. As a result, DirectX-based 3D applications, in particular, cannot access the GPU. This article shows how to activate NVIDIA vGPU for RDS-sessions. <!-- Add after testing: * Windows-Server-Version: * NVIDIA-vGPU-Version: * vGPU-Profile: * Hypervisor: --> == Requirements == The NVIDIA vGPU must be assigned to the vi...")
  • 07:4907:49, 20 July 2026 Supermicro BMC Security Advisories July 2026 (hist | edit) [1,687 bytes] Aranzinger (talk | contribs) (Created page with "In '''July 2026''', Supermicro published Security Advisories for the BMC-firmware of their mainboards. This security vulnerability requires a '''firmware update'''. In this article, you will find information on this Security Advisory and where to find updates on Thomas-Krenn products. == Security Advisories == {| class="wikitable" |- style="background-color: #EFEFEF; font-weight: bold;" ! align="center" |CVE ! align="center" |Risk potential ! align="center" |Descripti...")

17 July 2026

  • 09:3809:38, 17 July 2026 Installation of Ollama (hist | edit) [6,894 bytes] Aranzinger (talk | contribs) (Created page with "'''Ollama''' allows the local operation of Large Language Models (LLMs) on a Linux server. The models run on the own hardware and can be used via command line or HTTP-API. This article presents the native installation of Ollama on an Ubuntu server. As an example, a small model is downloaded and tested by using the local command line as well as the local API. <!-- Add the following information after testing: * Ubuntu-Version used: * Ollama-Version used: * Testhardware u...")

16 July 2026

15 July 2026

  • 14:0314:03, 15 July 2026 Synology UC3400 Metadata-Overflow (hist | edit) [3,637 bytes] Aranzinger (talk | contribs) (Created page with "frameless|322x322px|right On the Synology UC3400, a very high number of metadata objects (>10 million) leads to a critical condition in combination with migrations and snapshot load that may cause CPU and RAM overloads and cause migrations to fail. This article describes symptoms and provides possible solutions. == Initial situation == The UC3400 administrates SAN and LUN structures with the help of a internal metadata database. When there is...")