Linux Sysprep Jun 2026

: Truncate or delete logs in /var/log/ and clear the shell history with history -c .

: Clean out /tmp/ and /var/tmp/ to ensure no sensitive temporary data is carried over. Modern Alternatives: "Born-to-be-Cloned"

#cloud-config hostname: web-01 fqdn: web-01.example.com users: - name: deploy sudo: ALL=(ALL) NOPASSWD:ALL ssh_authorized_keys: - ssh-rsa AAAAB3... packages: - nginx runcmd: - systemctl enable nginx - systemctl start nginx linux sysprep

systemctl enable cloud-init

Not every Linux system needs generalization. : Truncate or delete logs in /var/log/ and

Next time you're about to clone a Linux VM, stop. Run the script. Let the machine die a little. Then, when it boots for the first time, it will live properly—unique, secure, and ready.

It's the understanding that a computer is more than its disk contents. It's the knowledge that identity, state, and hardware relationships matter. And it's the craft of stripping away the ephemeral so that the essential can be reborn. packages: - nginx runcmd: - systemctl enable nginx

Install cloud-init in your golden image. On first boot, it will:

Duplicate MAC addresses or persistent udev rules can prevent new clones from connecting to the network.

find /var/log -type f -exec truncate -s 0 {} ; rm -rf /var/cache/* /tmp/* /var/tmp/*