VirtualBox – Closing GUI session without shutting down VM

Recently I started using Oracle VM VirtualBox for my laptop home lab. And the main issue for me was, that I couldn’t close GUI console without shutting down virtual machines (when you click on X, to close console you have only option to Save the machine state, Send the shutdown signal or Power off the machine). There is a way to handle it.

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SSH Disconnected: No supported authentication methods available

Lately I had weird issue while I wanted to connect to newly deployed ESXi via SSH using putty.  ESXi object was installed using Vagrant. After typing login, I got error: “SSH Disconnected: No supported authentication methods available”. Of course SSH service was up and running and I was able to connect to ESXi via DCUI and vSphere  Client.

AWS – Understanding Amazon Virtual Privat Cloud (VPC)

What is Amazon VPC?

VPC (Virtual Privat Cloud) is a virtual network, which is logically isolated from other virtual networks in the AWS Cloud. It is dedicated to you AWS account. It is master subnet, which you can use to create smaller subnets. VPC is created per region and it spans all Availability Zones in this region. You must specify an IP address range for the VPC (Classless Inter-Domain Routing (CIDR) block, for example 192.168.0.0/16). Then you can add subnets (example 192.168.1.0/24), associate security groups, and configure route tables.

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AWS vs Azure vs VMware naming comparison

AWS Azure VMware compare naming

Direct side-by-side comparisons between Microsoft Azure, Amazon Web Services (AWS) and VMware (vSphere on-prem solution) aren’t always possible.  But some of them are close enough, so I created below table, so better understand terminology. It helped mi to transfer my understanding from VMware to AWS, when I prepared to AWS Certified Solutions Architect exam.
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