Linux on Neil Borromeo - I build dependable infrastructure, automation, and digital systems for real-world businesses

Autostarting WSL the Right Way

Tue, 17 Mar 2026 13:15:00 +0800

A short fix note on why the imaginary `wsl2.autostart` setting does not work and what to use instead.

Improving Send-Only SMTP Deliverability with SPF and DKIM

Sun, 15 Mar 2026 05:02:00 +0800

A practical send-only mail setup using Postfix, SPF, and OpenDKIM to improve deliverability.

Moving GitLab to a New Server with Backup and Restore

Mon, 30 Jun 2025 09:59:01 +0800

A first-pass operational guide to rebuilding GitLab on a new server, restoring data, and carrying over the details that matter.

Installing Terraform on Ubuntu 24.04 LTS

Thu, 23 Jan 2025 00:00:00 +0800

A short reference note for installing Terraform from HashiCorp's apt repository on Ubuntu 24.04.

Certbot Renewal with a Docker Compose Nginx Reload Hook

Tue, 24 Sep 2024 00:00:00 +0800

A short practical note on renewing Let's Encrypt certificates with Certbot and reloading Nginx inside a Docker Compose stack.

Upgrading GitLab from 16.10 to 17.0 Without Skipping the Required Step

Mon, 27 May 2024 00:00:00 +0800

A practical GitLab upgrade note showing the required stop at 16.11 before moving from 16.10 to 17.0.

Wiping or Formatting a USB Disk from WSL 2

Wed, 06 Mar 2024 00:00:00 +0800

A practical note on identifying, attaching, wiping, and detaching a physical disk through WSL 2.

Fixing a Cloudflared Tunnel by Reauthenticating and Recreating Credentials

Thu, 29 Feb 2024 00:00:00 +0800

A practical note on repairing a cloudflared setup by upgrading the binary, logging in again, and recreating tunnel credentials.

Fixing Thumbor SSL Renewal on an Aging Certbot Install

Fri, 23 Feb 2024 00:00:00 +0800

A note on diagnosing SSL renewal problems on an older host that was still using `certbot-auto`.

Restarting a Vault Container in a Staging Environment

Thu, 15 Feb 2024 00:00:00 +0800

A short operational note on restarting and inspecting a Vault container inside a Compose-based staging environment.

Setting Up a Cloudflared Tunnel for a Cluster

Thu, 15 Feb 2024 00:00:00 +0800

A first-pass draft on installing cloudflared and using it to provide tunnel access for a cluster environment.

Preparing Canical Storage Nodes for a Ceph Cluster

Mon, 12 Feb 2024 00:00:00 +0800

A practical note on inventorying storage nodes, confirming disk layout, wiping target devices, and fixing routes before a Ceph build.

Forcing IPv4 and Disabling IPv6 on Ubuntu 20.04

Thu, 05 Oct 2023 00:00:00 +0800

A short note on disabling IPv6 at the sysctl layer on Ubuntu 20.04.

Fixing `br_netfilter` Sysctl Errors During Kubernetes Node Prep

Thu, 28 Sep 2023 00:00:00 +0800

A quick fix for Kubernetes node setup failures caused by missing bridge netfilter kernel support.

Rebuilding Worker Nodes in a Rancher-Managed Cluster

Tue, 11 Jul 2023 00:00:00 +0800

A practical cluster recovery note covering node cleanup, re-registration, and follow-up cluster reconstruction work.

Fixing a DeepOps or OpenShift Ansible Run Blocked by `pkg_resources`

Mon, 03 Jul 2023 00:00:00 +0800

A short troubleshooting note for Ansible runs that fail because Python cannot import `pkg_resources`.

Provisioning a CentOS 7 Instance on Vultr

Mon, 05 Apr 2021 22:50:00 +0800

A cleaned-up 2021 work log for bringing up a CentOS 7 server on Vultr with MariaDB, Nginx, PHP-FPM, Varnish, and Let's Encrypt.

Invalid command ‘Header’ in htaccess

Tue, 01 Feb 2011 09:05:00 +0000

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

Playing with your hosts file /etc/hosts

Thu, 27 Jan 2011 07:36:00 +0000

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

Images don't show up in Magento Product Information Page

Thu, 27 Jan 2011 07:22:00 +0000

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

Copying Multiple Files using SCP

Thu, 20 Jan 2011 07:43:00 +0000

A short example of using scp to copy one or more files between Linux machines.

Backup/Restore mysql databases using mysqldump

Wed, 08 Dec 2010 09:35:00 +0000

A quick command-line example for backing up and restoring a MySQL database with mysqldump.

Excluding files and folders with tar

Wed, 08 Dec 2010 06:24:00 +0000

A quick example of excluding specific files or directories when creating a tar archive.