Eveng Qemu - Images Download Better

EVENG 5.0 (in beta) introduces a built-in Image Hub. Instead of downloading and manually moving files, you can:

Until then, the manual methods above remain essential.

Also, look out for cowbuilder and debootstrap integration—allowing you to build custom Linux QEMU images from scratch inside EVENG, ensuring you never have to download untrusted images again. eveng qemu images download better

/opt/unetlab/addons/qemu/
└── vyos-1.4.0/
    ├── virtioa.qcow2   # renamed from downloaded image
    ├── hda.qcow2       # optional second disk
    └── vyos.yml        # optional template

The EVENG community sometimes releases quarterly "mega packs." Use Transmission on the EVENG server:

sudo apt install transmission-cli
transmission-cli -w /opt/unetlab/addons/qemu/ eveng-pack.torrent

Better security: Always validate .torrent files from official community forums (like EVE-NG's Slack channel). EVENG 5

Don’t manage images manually like a caveman. Use these tools to download better.

Downloading is only half the battle. To make the image work "better," you must ensure it is named correctly and optimized. Until then, the manual methods above remain essential

Convert compressed or sparse qcow2 to fixed-size raw (if required):

Check image info:

Preallocate/capacity resizing:

Set backing file / flatten images when needed:

Examples:

Inspect a qcow2:

To improve performance and disk usage:

| Feature | Command | |---------|---------| | Compress image | qemu-img convert -c -O qcow2 original.qcow2 compressed.qcow2 | | Resize disk | qemu-img resize image.qcow2 +10G | | Enable virtio for faster I/O | Edit .yml → virtio: true | | Set correct permissions | /opt/unetlab/wrappers/unl_wrapper -a fixpermissions |

If you simply Google "Cisco vIOS QEMU image for EVENG," you will likely end up on a shady file-sharing site with outdated malware risks. Here are the better sources.