Recent posts
Marginalia
Agentic AI: AI That Does, Not Just Says
Most people's experience with AI is conversational. You ask a question, you get an answer. Maybe you ask it to write something, and it writes it. The exchange ends there.…
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Marginalia
Normalized vs. Denormalized Database Design: Weighing the Pros and Cons
In the world of relational database design, developers often face a crucial decision: should they opt for a highly normalized structure with multiple tables, or choose a denormalized approach with fewer, wider tables? This choice can significantly impact the…
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Leadership
Accept the Friction
Doing deep, important work is often difficult. Things get in the way. Things go wrong. Your ideas don't work out the way you expected.…
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Linux
Linux Low Disk Space On Root? One way to clean up space if you use Flatpak.
The dreaded 'Low Disk space on /'. You may think to yourself, "But, I have plenty of space on my hard drive. How can space on root be low?" An online search will give numerous things to try - cleaning your package manager cache, removing all…
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Linux
SSH - Too Many Authentication Failures
There are a handful of possible reasons for this error. Perhaps the problem is exactly what is says; you have tried and failed to log in too many times. Maybe your ssh configuration on the server side doesn't allow you to log in at all. Or, you could be bl…
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Git
Rename a Local Git Branch
Naming thigs is hard. On a few occasions I have named a Git branch, then decided a different name would be better / more descriptive. Recently, I was working on a branch for a project, and we decided to go a different direction. My branch had the perfect name…
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Linux
Cloning a KVM Virtual Machine Image
I often need to test on servers set up in a very precise way. I may need to test an application running on an Ubuntu server with Apache and a specific version of php. Or, I may need to test an application or site on a LEMP stack running on CentOS.…
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Marginalia
Links for Conference Talks I Have Given
This page has a list of talks that I have given. With each there is a short overview, a link to resources mentioned in the talk, and a link to the slides. Each of these talks has been given at several events. Watch my Twitter account for announcements of where…
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PHP
Using Multiple Values in a Single .env Entry
In a recent project I needed to have multiple email addresses in one .env entry. In case you are not familiar with .env, here I am talking about using Vance Lucas' project phpdotenv, which uses a .env file for making values available to a php application.…
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Linux
Understanding SSH Key Types
There are several encryption key formats available for ssh. Here I am covering DSA, RSA, ECDSA, and Ed25519. These are the most common. DSA and RSA use factoring of 2 large prime numbers in their encryption algorithm. ECDSA and Ed25519 use elliptical curves.…
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Marginalia
View compressed log files with Zcat
Have you ever need to view log files after they have been rotated and compressed? Many people uncompress the file with gunzip or gzip -d then view the file. Linux gives us a shortcut, namely zcat. Zcat opens a compressed file immediately for viewing. However,…
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Linux
Update Your Server Host Keys
If you maintain a VPS, hopefully you are aware of the continuous attack attempts. As one measure to keep your server secure you should periodically change your server's host keys. If your server has been compromised, you definitely want to change your key…
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PHP
Auto-generating slugs with PHP
The term slug comes from the newspaper industry, where I spent 15 years of my career. Editors and reporters use a "slug" as a short name for an article, mostly while it is in development. The slug can contain information about the article like the se…
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PHP
PHP Codesniffer - Using Custom Standards on a Per Project Basis
What is PHP Codesniffer?…
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Linux
Putting Applications in your Desktop Menu
Menus…
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Marginalia
Note-Taking with Vim
I am experimenting with note-taking/journaling using Vim. I use Vim for almost all other text-based activities, so, why not? I have used Evernote for many years, and have a ton of content there. But, I am looking for more security and control.…
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Linux
Command Line Weather
If you live in the command line, like I do, anything that keeps you from having to leave it is a good thing. I am not a weather junkie. But, I often want to know if it is going to rain during my commute, or if I am going to be able to enjoy the outdoors when I…
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Git
Reparent a Branch
I recently had several bug fixes to work on one after another. These bugs were in our development branch, and were found in testing. I branched from our development branch, fixed bugs, and made commits. Each bug was on its own branch.…
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Linux
How to Add a Samba User From the Command Line
Adding Samba users is likely a task that you have to do irregularly. Here is a simple set of instructions that I hope can be a resource. Entries inside <> should be replaced, without the <>, with your entries. Entries inside [] are optional. …
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Git
Using Git to push to your production server
I have used Git for version management for several years. Recently I began using it to push code to both a web-accessible repository, as well as the server from which the code is served. Using this workflow, all I have to do to make code live is ru…
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Marginalia
How do I create a new Google Drive file?
It is super easy.…
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Leadership
Enter to Win!
No, I am not running a contest. Many people have dreams, big dreams, small dreams, and everything in-between. They think about their dream, mostly about the results of obtaining their dream. But, to get there requires planning and action. In order to reach you…
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uncategorized
FoMO - the Fear of Missing Out. Don't let it drive your decisions.
Do you start the day with the best of intentions? You have your plan for the day. Then, something grabs your attention. Good leaders do often want to "do it all". There are always many things vying for your attention. The best leaders can say…
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Leadership
Motion, Confusion, Direction, and Action
"How are you?", a colleague asks. You answer with the answer you always give, "I am busy, so very busy." But, are you truly busy? Or, are you addicted to the feeling of "busy". If you want to do some self-inspection, read on.…
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Leadership
Deadlines - Don't change them!
What are the effects of extending a deadline? All leaders have been put in the position of "needing" to extend a deadline. Perhaps you are not reaching a goal of the project, or outside forces are introducing new challenges to the project. Human natu…
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