Tweaking Linux Templates

Select a kernel built for virtualisation

Employ  linux-image-kvm kernel, which is purpose-built for KVM virtualisation.

For instance, on Ubuntu, run the following commands:

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

Tidy up before publishing a template

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

(as root) rm /root/.bash_history