Linux

This draft captures the practical shape of a cluster-side Cloudflare tunnel setup: install cloudflared, register the service, and use DNS-backed certificate workflows where needed.

This draft keeps the preparation side of a Ceph build intact: identify the right storage nodes, inspect the disk inventory carefully, wipe only the intended devices, and make sure the nodes have the network path they need before the actual Ceph deployment begins.

This draft captures a simple Ubuntu 20.04 configuration change where I disabled IPv6 through sysctl.conf to force IPv4 behavior for a workload.

This draft captures a Kubernetes preparation issue where sysctl reloads failed because /proc/sys/net/bridge/bridge-nf-call-iptables did not exist until br_netfilter was loaded.

This draft captures a real cluster recovery workflow where problem nodes were cleaned up, re-registered into Rancher, and then brought back into a larger rebuild that included storage, MetalLB, and GPU-related follow-up work.

This draft captures a small but blocking issue in a DeepOps-style Ansible run where the remote Python environment was missing the pkg_resources module from setuptools.

This is a real-world provisioning log, rewritten into a readable deployment walkthrough for Linux admins and technical hiring managers.

A quick fix for the Apache htaccess error about the invalid ‘Header’ command.

A practical introduction to using the hosts file for local development, domain mapping, and basic troubleshooting.

A quick fix for missing Magento product images after a media directory transfer caused cache permission problems.