Linux Sysprep Page

If you’ve ever cloned a production Linux VM and watched both the original and the clone fight over the same static IP, share the same SSH host keys, or mount the wrong filesystems, you know that’s a lie.

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. linux sysprep

#!/bin/bash set -e echo "=== Linux Sysprep - Generalizing System ===" find /var/log -type f -exec truncate -s 0 {} ; rm -rf /var/cache/* /tmp/* /var/tmp/* 2. Remove unique IDs echo -n > /etc/machine-id rm -f /var/lib/systemd/random-seed 3. Remove SSH host keys rm -f /etc/ssh/ssh_host_* 4. Remove network interface persistence rm -f /etc/udev/rules.d/70-persistent-net.rules rm -f /etc/network/interfaces.d/50-cloud-init.cfg # if using netplan 5. Clean package manager cache apt clean || yum clean all || dnf clean all 6. Remove shell history unset HISTFILE history -c find /home -name ".*history" -exec rm -f {} ; rm -f /root/.bash_history 7. Prepare for first-boot provisioning Ensure cloud-init is installed and enabled systemctl enable cloud-init 8. Remove udev hardware database (forces re-detection) rm -f /etc/udev/hwdb.bin If you’ve ever cloned a production Linux VM

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. Let the machine die a little