Linux Template Tweaking

Use a kernel specific to virtualisation

Use  the linux-image-kvm kernel, which is designed for KVM virtualisation.

For example, on Ubuntu, you should execute the following commands:

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

Clean up before publishing a template

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

(as root) rm /root/.bash_history