: After uploading images via SFTP (using tools like WinSCP), you must run the fix permissions command on your EVE-NG CLI: /opt/unetlab/wrappers/unl_wrapper -a fixpermissions . Qemu image namings - - EVE-NG
Instead of hunting for individual images, many community members use that bundle popular vendor images (Cisco, Juniper, Palo Alto) into a single download. This allows you to:
and create directories using exact prefixes. For example, a Layer-2 Switch must start with File Renaming : Regardless of the original file name (e.g., ), the main disk file within the folder must be renamed to virtioa.qcow2 Permission Automation
Use an SFTP client like FileZilla or WinSCP to connect to your Eve-NG server. Navigate to the proper QEMU directory: /opt/unetlab/addons/qemu/ Use code with caution. 2. Create the Correct Directory
: vEOS-lab images are free to download after registering an account on the Arista website Fortinet : FortiOS QEMU images for FortiGate VMs eveng qemu images download better
Downloading is only half the battle. To ensure the image works "better": to move the folder to /opt/unetlab/addons/qemu/ Crucial Step:
Eve-NG (Emulated Virtual Environment Next Generation) is the premier tool for network engineers, administrators, and security professionals to build complex, real-world lab topologies. However, the performance and stability of your labs depend entirely on the quality of your virtual images. Using optimized QEMU (Quick Emulator) images—rather than raw, uncompressed files—drastically improves boot times, reduces disk space, and prevents CPU spikes.
Here is how to optimize your EVE-NG image workflow for speed, reliability, and performance. 1. Source Smart (and Legal)
: Run the qemu-img command in the CLI: qemu-img convert -f vmdk -O qcow2 source_file.vmdk virtioa.qcow2 Clean up : Delete the original .vmdk file to save space. 4. Critical Final Step: Fixing Permissions : After uploading images via SFTP (using tools
: The safest and most stable images come directly from vendors like Cisco (CML/VIRL) Community Repositories : Sites like GitHub (hegdepavankumar)
Remember the golden rules:
I can provide the exact directory paths, naming structures, or optimization commands for those specific nodes! Share public link
QEMU (Quick Emulator) is the virtualization backbone of EVE-NG. It allows you to run full network operating systems (like Cisco IOS-XR, Arista EOS, and Juniper Junos) inside Linux-based virtual machines. For example, a Layer-2 Switch must start with
To convert an inefficient or uncompressed image into a lean qcow2 file, run the following command:
Eve-NG uses the base image as a read-only template. When you wipe or start a node, Eve-NG creates a tiny snapshot layer for changes, leaving the original download pristine and untouched.
If you download an image that is in a .vmdk (VMware), .vdi (VirtualBox), or raw .img format, you must convert it to an optimized qcow2 format before adding it to Eve-NG. You can do this easily using the qemu-img tool on your local machine or directly inside the Eve-NG CLI. Step 1: Convert to QCOW2