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	== VM Management ==		== VM Management ==

Admin: Created page with "Category:Wiki == VM Management == === Create a Virtual Machine === To create a new virtual machine from scratch: VBoxManage createvm --name "MyVM" --register Example for adding a VM with specific settings: VBoxManage createvm --name "LinuxVM" --ostype "Linux_64" --register VBoxManage modifyvm "LinuxVM" --memory 2048 --cpus 2 --nic1 nat === Modify Virtual Machine === You can modify various properties of a VM, such as memory, C..."

2026-01-12T19:35:23Z

Created page with "Category:Wiki == VM Management == === Create a Virtual Machine === To create a new virtual machine from scratch: <nowiki> VBoxManage createvm --name "MyVM" --register </nowiki> Example for adding a VM with specific settings: <nowiki> VBoxManage createvm --name "LinuxVM" --ostype "Linux_64" --register VBoxManage modifyvm "LinuxVM" --memory 2048 --cpus 2 --nic1 nat </nowiki> === Modify Virtual Machine === You can modify various properties of a VM, such as memory, C..."

New page

[[Category:Wiki]]

== VM Management ==

=== Create a Virtual Machine ===
To create a new virtual machine from scratch:
<nowiki>
VBoxManage createvm --name "MyVM" --register
</nowiki>

Example for adding a VM with specific settings:
<nowiki>
VBoxManage createvm --name "LinuxVM" --ostype "Linux_64" --register
VBoxManage modifyvm "LinuxVM" --memory 2048 --cpus 2 --nic1 nat
</nowiki>

=== Modify Virtual Machine ===
You can modify various properties of a VM, such as memory, CPU, or network settings.

Change memory allocation:
<nowiki>
VBoxManage modifyvm "LinuxVM" --memory 4096
</nowiki>

Change number of CPUs:
<nowiki>
VBoxManage modifyvm "LinuxVM" --cpus 4
</nowiki>

=== Start, Pause, and Stop a VM ===
Start a VM in headless mode:
<nowiki>
VBoxManage startvm "LinuxVM" --type headless
</nowiki>

Pause a running VM:
<nowiki>
VBoxManage controlvm "LinuxVM" pause
</nowiki>

Stop a VM gracefully:
<nowiki>
VBoxManage controlvm "LinuxVM" acpipowerbutton
</nowiki>

Force stop a VM (hard shutdown):
<nowiki>
VBoxManage controlvm "LinuxVM" poweroff
</nowiki>

=== Snapshot Management ===
Create a snapshot of a running VM:
<nowiki>
VBoxManage snapshot "LinuxVM" take "Snapshot1" --description "Before update"
</nowiki>

Restore a snapshot:
<nowiki>
VBoxManage snapshot "LinuxVM" restore "Snapshot1"
</nowiki>

List all snapshots for a VM:
<nowiki>
VBoxManage snapshot "LinuxVM" list
</nowiki>

=== VM State and Saving ===
Save the current state of a VM:
<nowiki>
VBoxManage controlvm "LinuxVM" savestate
</nowiki>

=== Delete a Virtual Machine ===
To completely delete a VM and all associated files:
<nowiki>
VBoxManage unregistervm "LinuxVM" --delete
</nowiki>

== Storage Management ==

=== Create a Virtual Disk ===
Create a new virtual hard disk (VHD):
<nowiki>
VBoxManage createhd --filename "/path/to/vm.vdi" --size 10240
</nowiki>

Create a dynamic disk (size grows as data is added):
<nowiki>
VBoxManage createhd --filename "/path/to/vm.vdi" --size 10240 --variant Standard
</nowiki>

Create a fixed-size disk:
<nowiki>
VBoxManage createhd --filename "/path/to/vm.vdi" --size 10240 --variant Fixed
</nowiki>

=== Attach Storage to VM ===
Attach a virtual disk to a VM:
<nowiki>
VBoxManage storageattach "LinuxVM" --storagectl "SATA" --port 0 --device 0 --type hdd --medium "/path/to/vm.vdi"
</nowiki>

Attach an ISO image to a VM (for installation):
<nowiki>
VBoxManage storageattach "LinuxVM" --storagectl "IDE" --port 0 --device 0 --type dvd --medium "/path/to/iso.iso"
</nowiki>

=== Detach Storage from VM ===
Detach a virtual disk:
<nowiki>
VBoxManage storageattach "LinuxVM" --storagectl "SATA" --port 0 --device 0 --medium none
</nowiki>

== Network Management ==

=== Create and Attach Network Interfaces ===
Create a NAT network interface:
<nowiki>
VBoxManage modifyvm "LinuxVM" --nic1 nat
</nowiki>

Create a bridged network interface:
<nowiki>
VBoxManage modifyvm "LinuxVM" --nic1 bridged --bridgeadapter1 "eth0"
</nowiki>

Create an internal network interface:
<nowiki>
VBoxManage modifyvm "LinuxVM" --nic1 intnet
</nowiki>

=== Modify Network Settings ===
Set the MAC address of a network interface:
<nowiki>
VBoxManage modifyvm "LinuxVM" --macaddress1 "080027001234"
</nowiki>

=== View Network Configurations ===
Display network settings for a VM:
<nowiki>
VBoxManage showvminfo "LinuxVM" --details
</nowiki>

== Security Concepts ==

=== Virtual Machine Isolation ===
Ensure that VMs are isolated from each other to prevent unauthorized access. VirtualBox provides network modes like NAT and internal networks for this purpose.

Example of an isolated internal network:
<nowiki>
VBoxManage modifyvm "LinuxVM" --nic1 intnet
</nowiki>

=== Securing VirtualBox Hosts ===
When running VirtualBox on Linux, it is essential to limit the access to the VirtualBox process to trusted users only. Use appropriate file permissions for VirtualBox configuration files and VM disks.

Check file permissions of VM files:
<nowiki>
ls -l /path/to/vm.vdi
</nowiki>

To change file permissions:
<nowiki>
chmod 600 /path/to/vm.vdi
</nowiki>

=== Virtual Machine Encryption ===
You can encrypt a virtual disk to protect its contents.

Enable disk encryption:
<nowiki>
VBoxManage encryptvm "LinuxVM" --password "securepassword"
</nowiki>

Decrypt the virtual disk (requires password):
<nowiki>
VBoxManage decryptvm "LinuxVM" --password "securepassword"
</nowiki>

== Troubleshooting ==

=== VM Fails to Start ====
If the VM fails to start, check the logs for errors:
<nowiki>
VBoxManage showvminfo "LinuxVM" --log
</nowiki>

Ensure the VM has sufficient memory and CPU resources.

=== Network Issues in VM ====
Verify the network interface settings for your VM:
<nowiki>
VBoxManage showvminfo "LinuxVM" --details
</nowiki>

Check for correct bridged or NAT network settings and ensure the host machine has a working network connection.

=== VM Performance Issues ====
If a VM is running slow, check if there are sufficient resources:
* Allocate more CPU or memory:
<nowiki>
VBoxManage modifyvm "LinuxVM" --memory 4096 --cpus 2
</nowiki>
* Check I/O performance of the virtual disk:
<nowiki>
VBoxManage showvminfo "LinuxVM" --details
</nowiki>

=== Disk Space Issues ====
Ensure there is enough space for the virtual disk image on the host system.

Check disk space usage:
<nowiki>
df -h
</nowiki>

=== Error: "Failed to open a session for the virtual machine" ====
This could be due to permissions or resource issues. Ensure you have proper permissions to access the VM's files and that VirtualBox services are running correctly.

Check VirtualBox process:
<nowiki>
ps aux | grep VirtualBox
</nowiki>

Restart the VirtualBox service:
<nowiki>
sudo systemctl restart vboxdrv
</nowiki>

== Useful links ==
* https://www.virtualbox.org/manual/ch08.html
* https://www.virtualbox.org/wiki/VM_commands
* https://www.virtualbox.org/manual/ch06.html
* https://www.virtualbox.org/wiki/VirtualBox_SDK
* https://www.virtualbox.org/wiki/Networking

VBOXMANAGE - Base Guide - Revision history

Admin: Text replacement - "Category:Wiki" to "Category:Wiki '''''[https://it-arts.net/index.php/Category:Wiki Return to Wiki Index]''''' "