Vm Image Ubuntu May 2026

22.04 (Jammy), 24.04 (Noble). Non-LTS releases (e.g., 24.10) are also available for testing. 3. Common Hypervisors and Image Formats | Hypervisor | Preferred Format | Ubuntu Image Command / Step | |------------|----------------|-----------------------------| | KVM/QEMU | .qcow2 | qemu-img convert -O qcow2 ubuntu.img disk.qcow2 | | VirtualBox | .vdi or .vmdk | VBoxManage import ubuntu.ova | | VMware ESXi/Workstation | .vmdk | Direct attach or OVF import | | Hyper-V | .vhdx | New-VM -VHDPath .\ubuntu.vhdx | | Xen/Proxmox | .qcow2 | qm importdisk <vmid> ubuntu.qcow2 <storage> | 4. Creating a Custom Ubuntu VM Image (Step-by-Step) 4.1 Base Image Download wget https://cloud-images.ubuntu.com/noble/current/noble-server-cloudimg-amd64.img 4.2 Resize Disk (Default ~2–5 GB) qemu-img resize noble-server-cloudimg-amd64.img +20G 4.3 Launch VM (KVM example) qemu-system-x86_64 -m 4096 -smp 2 -drive file=noble-server-cloudimg-amd64.img,format=qcow2 -net user,hostfwd=tcp::2222-:22 -net nic 4.4 Customize (cloud-init) Create user-data :

qemu-img convert -f vmdk ubuntu.vmdk -O qcow2 ubuntu.qcow2 Convert .vdi (VirtualBox) to .raw : vm image ubuntu

#cloud-config users: - name: admin sudo: ALL=(ALL) NOPASSWD:ALL ssh_authorized_keys: - ssh-rsa AAAAB3... packages: - docker.io - htop Generate ISO: Common Hypervisors and Image Formats | Hypervisor |

cloud-localds seed.iso user-data Attach ISO to VM. | Area | Recommendation | |------|----------------| | Disk I/O | Use virtio-scsi + discard (TRIM support) | | Memory | Install qemu-guest-agent for ballooning | | Time sync | systemctl enable --now chrony | | Kernel | Use linux-image-virtual (lighter) | | SSH | Disable password auth, use SSH keys | | Firewall | ufw default deny incoming && ufw enable | 6. Converting Between Formats Convert a .vmdk (VMware) to .qcow2 (KVM): | Area | Recommendation | |------|----------------| | Disk