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Virtual Geek

Tales from real IT system administrators world and non-production environment

Blog posts June 2025

VMware Photon OS Remote SSH: Password Authentication Fix

After installing and setup VMware Photon OS in my lab on VM. While doing remote SSH to the Photon OS, my root user login was failing after providing correct password multiple times. In the last it was showing Too many authentication failures.

Screenshot of a PowerShell console showing an SSH connection attempt to root@192.168.34.48 repeatedly failing with 'Too many authentication failures' and a disconnect message.

As remote SSH root login attempt was failing, I …

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How to Resize Azure Virtual Machines using PowerShell Script

This PowerShell script automates resizing Azure VMs. First use Get-AzVMSize command as shown in the below screenshot to check supported and available VM sizes in the given Resource Group. From the generated list of the Virtual Machine Size names, Use selected one in the parameter and execute the ma…

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Photon OS: Allow Ping (ICMP) Through IPTables Firewall

While working with VMware Photon OS, I was seeing an issue where I configured IP addresses successfully, but ping (ICMP) was not working from outside. This occurs due to ICMP (ping) traffic is blocked by default in Photon OS’s iptables firewall rules.

To resolve this and allow ping functional…

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Fix CPU Support Error: Installing VMware ESXi 9 on Unsupported CPUs

While testing the newly released VMware ESXi 9 in my lab environment, I was seeing the following error during the installation process. This issue popped up right after the system scan and was not letting me do the complete deployment. In this article, I’ll walk you through the cause of the error an…

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Performing vCenter Offline Updates Via Your On-Prem Web Server Securely & Seamlessly

Handling vCenter Server updates across multiple sites with limited internet access creates operational annoyances. Downloading ISO files for each instance, manually transferring them, and repeating the process for every vCenter consumes valuable time and resources for really big environments.

In …

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Monitoring Dell Server Health Using RACADM CLI: Sensor Info from iDRAC

The racadm cli command with getsensorinfo subcommand fetches real-time live hardware sensor data such as temperature, voltage, and power, memory, processor status and other hardware information from a Dell server's iDRAC system. This is very useful to system administrators for monitoring server hea…

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Turn Your PowerShell Into a Web Server: Instantly Share Local HTML & Files!

While working on some project I wanted a quick web server for testing. Instead of deploying and using full fledged production web servers such as IIS, Apache, HTTPD, NGINX etc. I created very lightweight web server using PowerShell which serve the purpose to use it for just quick web testing purpose…

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Excel on Web Browser: Simple Guide for Reports & Dashboards

This is a Quick Guide on displaying Excel files in your choice of browser such as chrome, edge etc Instantly. 

Benefits of Using This Method:

  • Share and Collaborate Easily: A Web-Based Excel Viewer for Teams.
  • 100% HTML Code: Render Excel files directly in the browser.
  • Easy Update…

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