Category: Blog

Blog Home Lab
25. January 2022

BIG DISASTER @ irgNET Datacenter

Well I think the title is telling a lot. Unfortunately, in my main server the RAID 5 array has drifted apart due to 2 defective HDDs. First I got the information from iLO Advanced, the OnBoard Management solution of HPE, that one hard disk failed. Then I went to Datacenter 01 and exchanged the defective disk for a new one. During the rebuild, another disk […]

Blog HPE
21. January 2022

How to Update HPE NC550SFP 2.x Firmware

For the next Home Lab update, I decided to increase my network infrastructure to 10Gbit. For this, I picked out VMware 7.0 U3 compatible HPE NC550SFP CNAs for a small amount of money. However, these were at a firmware level beyond the Stone Age and were not recognized by either the HPE DL380p Gen8 or ML310e Gen8 v2 and I had no link. So I […]

Basic Tutorials Blog
20. January 2022

How to Check a file with MD5 or SHA-256 Checksum on Windows

When downloading files for patching or drivers you may need to verify the file is complete.  This can be done by verifying the MD5 checksum from the steps below on your PC. 1. Open the Windows command line. Press Windows + R, type cmd and press Enter. 2. Go to the folder that contains the file whose MD5 checksum you want to check and verify. Command: […]

Blog VMware
18. January 2022

VMware ESXi 6.7 Upgrade to 7.0 (and 8.0) – Missing dependencies VIBs Error

In this project we had a stack consisting of 3 individual VMware ESXi 5.5 servers. These are the Cisco UCS C240M4S2 model with Intel XEON v3 CPUs. As mentioned earlier, 09/18/2020 was considered End of Support for ESXi 5.5 and so most are now forced to update their environments to the latest version. First we check via VMware Compatibility Guide if the hardware component, BIOS […]

Advanced Tutorials Blog
17. January 2022

UniFi Network – How to Install and Update via APT on Debian or Ubuntu

Welcome to a short tutorial on how to keep your Unifi controllers up to date. Please do not forget to make a backup of your Unifi machine before each update. If you don’t have root rights you have to use sudo for every command! 1. Install required packages before you begin with the following command: 2. Use the following command to add a new source list: 3. Add […]

Blog VMware
13. January 2022

How to export an ESXi 5.5 VM for Restore

In case you don’t have a backup solution in your home labs but also surprisingly in your company. I would like to show you a backup variant for your VMs. Please note that a backup is necessary in the home lab as well as in the company for long-term data consistency. This is by no means a professional backup solution but intended for the case […]

Blog VMware
6. December 2021

Home Lab Nomination by VMware vSAN

On Saturday my Home Lab was nominated by VMware vSAN and posted on their twitter page, something like that makes you proud after all. BIG THANKS to VMware 🙂 That’s just the beginning of a great Adventure.

Blog VMware
1. December 2021

Error 500 after upgrading VMware vCenter to 7.0.2.00200

I tried to update my ESXi hosts after updating to ESXi 7.0 U2 with build 17867351, but I received the following error message: After reviewing the logs and restarting the vCenter, I found no solution until I became aware of this Knowledge Base article from VMware, which subsequently solved my problem. To fix this error message, the VMware Update Manager database of the vCenter must […]

Blog Debian VMware
4. November 2021

How to install VMware Tools in a Debian VM

In this small tutorial I want to show you how to install the VMware tools in a Debian VM. VMware Tools is a set of services and components that enable various features in different VMware products for better management and seamless user interaction with guest operating systems. Open VM Tools (open-vm-tools) is the open source implementation of VMware Tools for Linux guest operating systems. For […]

Advanced Tutorials Blog
20. October 2021

How to install VPN-Server with PRITUNL on Debian 10

Pritunl is a VPN server software based on the popular OpenVPN platform. In this tutorial, you will learn how to set up and use Pritunl on your Debian -based server. I encountered lots of misinformation on the internet during my installation, which made installing pritunl difficult. So you don’t have these problems, I’ve summarized the tutorial in an easy to understand way. Please remember, if […]