Optimising Linux Templates

Pick a Virtualization-Specific Kernel

Make use of the linux-image-kvm kernel, which is purpose-built for KVM virtualization.

On Ubuntu, for example, you'd issue these commands:

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

Clean Up Before Releasing the Template

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

(as root) rm /root/.bash_history