/opt/unetlab/wrappers/backup_lab.pl -m Then:
Before any update, always take a full snapshot (VMware) or do a tar czf backup.tgz /opt/unetlab/ . That one command will save you hours of hunting for old downloads. Have you found a reliable archive of EVE-NG old versions? Share your experience in the comments on the official EVE-NG forums. And remember – always verify the checksum of any OVA you download, even old ones, to prevent tampering. eveng old version download upd
/opt/unetlab/wrappers/fix_permissions.sh Rare but possible. Example: eve-ng-updater_2.0.3-112_all.deb . Install via: /opt/unetlab/wrappers/backup_lab
apt update apt install eve-ng reboot But this will skip all intermediate patches. Not recommended for production labs. Warning: This often breaks labs. Backup first: even old ones