Customizing Linux Templates

Employ a kernel optimized for virtualization

Utilize the linux-image-kvm kernel, which is specifically designed for KVM virtualization environments.

For instance, within an Ubuntu setup, you'd run the following commands:

apt install linux-image-kvm
apt purge linux-image-generic

Perform cleanup prior to template publication

# removes logs
journalctl --vacuum-size=1
# removes user history
history -c

(as root) rm /root/.bash_history