Articles about virtual machines | UserComp.com

Upscaling Video Resolution on QEMU/KVM Virtual Machines for Better Display on Limited Resources

Resolve low resolution and sluggish display performance in QEMU/KVM VMs by configuring VirtIO GPU drivers and optimizing guest OS settings.

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Hyper-V with NAS: 3 PCs and 10 VMs Slowing Down Entire Home Internet

Resolve home internet slowdowns caused by Hyper-V VMs and NAS saturating bandwidth by isolating traffic via VLANs or configuring QoS policies.

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Automatically Installing VMs using virt-manager: A Tech Newbie's Guide

Eliminate repetitive manual configuration when creating multiple virtual machines by cloning a standardized golden template using virt-clone.

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Setting up a Domain in Hyper-V with External Switches for 3 VMs: One DC, One File Server, One Workstation (Intending to Deploy Ubuntu VM in Future)

Resolves Active Directory domain setup in Hyper-V by configuring external switches and static IPs for a DC, file server, and workstation.

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Misconfigured File: Emulated SSH Server Pinging, Traceroute Fails for Docker on Host VM

Resolve Docker and VM SSH server ping and traceroute failures by fixing network interfaces, firewall ICMP blocks, and port mappings.

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Setting Up Two Windows PCs with Two Different IP Addresses on Two Virtual Machines

Configure host-only networking and static IPs to enable Remote Desktop between two Windows virtual machines.

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Upscaling QEMU Virtual Machines for Better Performance

Resolve QEMU virtual machine performance bottlenecks by configuring CPU model compatibility, enabling KVM acceleration, and optimizing disk I/O with qcow2 formats.

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WSL and VM: Unable to Connect WSL2 Ubuntu to VMware VM

Resolve WSL2 Ubuntu connectivity issues with VMware VMs by aligning network modes and disabling Windows Firewall blocks.

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Setting up an X11 SSH Tunnel for Remote Desktop Access to a VM

Configure an SSH tunnel in PuTTY to securely access a VM's remote desktop via RDP without exposing port 3389.

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Cannot Bridge VM on Physical Machine despite Restoring Defaults in VMware Network Editor

Resolve VMware bridged networking failures by manually binding VMnet0 to the active physical adapter instead of using automatic selection.

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VMWare Workstation Pro: Resolving Static IP Assignment Issue with Two VMs (Kali Ubuntu)

Fix static IP assignment failures for Kali and Ubuntu VMs in VMware Workstation by configuring NAT mode and disabling DHCP.

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Configuring Firewall to Allow Docker Application Access to Virtual Machine

Resolve Docker container access failures from the host VM by configuring UFW or firewalld to allow inbound traffic on exposed ports.

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Isolating Outward-Facing Server VM from Internal Virtual Machine Cluster

Isolates outward-facing server VMs from internal clusters via dedicated VLANs and disabled promiscuous mode to prevent lateral movement.

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Unable to Connect Ubuntu 20.04 VM to Windows: SSH Connection Timeout

Resolve SSH connection timeouts between Windows and Ubuntu 20.04 by verifying network adapter settings, ensuring the SSH service is active, and configuring firewall rules.

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Resolving DNS Issues with Rocky Linux 8 Virtual Machines

Fixes DNS resolution failures in Rocky Linux 8 VMs by verifying NAT connectivity and correcting systemd-resolved settings.

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Unable to add existing virtual machines in VirtualBox

Resolve VirtualBox error when adding existing VMs by locating the .vbox configuration file instead of disk images and verifying file permissions.

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Misconfigured Files: Web Labs, SSH Server, ping, traceroute, and Web Apps Not Working on Main VM (SSH via Browser Works)

Resolve failed web labs, SSH, and ping on Ubuntu VMs by correcting service binding to 0.0.0.0 and configuring ufw firewall rules.

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Virtual Machine Crashing During Migration to Specific Host: Troubleshooting

Resolve virtual machine crashes during migration by verifying host resource availability, CPU compatibility settings, and network configuration consistency.

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Understanding Two Network Interfaces in Ubuntu 22.04 with Hyper-V Virtual Machines

Configure dual network interfaces in Ubuntu 22.04 Hyper-V VMs using Netplan for separate internet and internal traffic routing.

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Troubleshooting One Windows 10 VM Freezing While Another One Opens in VirtualBox

Resolve VirtualBox Windows 10 VM freezing during concurrent operation by optimizing host RAM allocation, adjusting vCPU counts, and enabling hardware virtualization.

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Reclaiming Lost Space: Deleting .vhdx Files in HyperV

Resolve access denied errors and reclaim storage by safely deleting locked .vhdx files after shutting down the virtual machine.

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Error Copying Virtual Machine File: Unknown Issue with Win11 Host and Ubuntu 22.04.03 in VmWare (17.05)

Resolve VMware file copy errors between Windows 11 and Ubuntu by installing open-vm-tools and manually mounting shared folders.

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Making a Virtual Internal NAT Switch Work for Hyper-V VMs

Resolve Hyper-V VM connectivity issues by configuring a virtual internal NAT switch to enable private inter-VM communication and controlled external access.

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Making a Static Virtual Internal NAT Switch Work with Hyper-V

Resolve Hyper-V VM IP instability on internal NAT switches by configuring a dedicated switch, host NAT rules, and static guest IPs.

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Running Executables from Mapped Drives in Virtual Machines: A Macintosh Example

Resolve Windows executables failing to run from VirtualBox shared folders on macOS by configuring auto-mount and Guest Additions.

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Converting VMDK to QCOW2 Format in ESXi with Rocky Operating System

Resolve VMDK to QCOW2 conversion errors on Rocky Linux by using qemu-img after exporting the disk from ESXi.

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QEMU Q35 Version Difference: Impact on Windows 10 VM Settings

Resolve QEMU startup failures and Windows 10 VM instability caused by incorrect machine type syntax or storage controller mismatches during upgrades.

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Connecting Different IP Addresses to Different VMs in Hyper-V: DC1-IP: 192.168.0.10, DC2-IP: 192.168.0.11, DC3-IP: 192.168.1.10, DC4-IP: 192.168.2.10

Assign static IP addresses to Hyper-V VMs by configuring external virtual switches and setting manual network settings in the guest OS.

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Addressing Hidden Disk Usage with Dynamically Sized exFAT Formatted Disks in Windows 10 for Hyper-V VMs

Resolve hidden disk usage in Hyper-V exFAT VMs by compacting the VHDX file to reclaim space deleted within the guest OS.

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Windows Server 2022: Hyper-V VM with Installed OS and Plesk Control Panel - Internal IP Not Public

Resolve Hyper-V VM internal IP issue by configuring an External Virtual Switch to expose Plesk on Windows Server 2022 to the public network.

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Why Does a Virtual Machine Show a Unique MAC Address After Changing Network Settings?

Resolve unexpected MAC address changes in virtual machines caused by hypervisor network reconfiguration and switching errors.

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Optimizing Windows XP Guest VM Performance with Lubuntu: A Solution to Sluggishness and Unresponsiveness

Resolve sluggishness and unresponsiveness in Windows XP guest VMs on Lubuntu by optimizing CPU, RAM, and OS settings.

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Retrieving Orphaned .avhdx Files in Hyper-V with No Corresponding Checkpoints

Merge orphaned .avhdx files into their parent virtual hard disks using Merge-VHD to reclaim storage space and restore VM integrity.

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DHCP Enabled: One Windows Server 2019 and Another Windows 10 Pro VM - No Internet Access

Resolve no internet access in Windows Server 2019 and Windows 10 Pro VMs by fixing VMware network adapter settings, IP allocation, and DNS configuration.

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VMware Workstation: Stability Comparison of Virtual Machines

Resolve virtual machine data inconsistency and state file corruption risks caused by host crashes while VMs are suspended.

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Troubleshooting Packet Loss in an Internal Network with Cisco-Managed Switch and Virtual Machines

Resolve internal packet loss in Cisco and VM environments by fixing duplex mismatches, verifying MTU consistency, and addressing hypervisor resource contention.

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