Tools & CLIs on Luther Monson

Building k9s for Linode With Bubble Tea

Wed, 09 Sep 2026 21:22:00 -0700

A lot of my day is spent in k9s. Sometimes I need something from the Linode side of the house. Maybe it’s a node that won’t boot, a volume nobody cleaned up or the kubeconfig for a cluster I just made. Then I’m back in a browser tab or typing linode-cli incantations. I wanted the k9s workflow for the Linode API itself:

: to jump to a resource type
/ to filter
single-key actions on the selected row
Enter to go deeper

That turned into linode-tui. It’s a Go TUI built on Bubble Tea, linodego and urfave/cli v3.

Stop Ctrl-C-ing Your tail -f | grep

Sat, 20 Jun 2026 20:31:00 -0700

Here’s a loop I end up in all the time:

tail -f app.log
something scrolls by that looks wrong, Ctrl-C
tail -f app.log | grep ERROR and wait for it to happen again
decide I also want to drop the health checks, Ctrl-C
| grep -v healthz and wait again

Every filter tweak throws away the stream and every line that already went past. I got tired of it and wrote tail-gunner. It’s a tail replacement that you can promote into a filtering TUI with one keystroke. You can drop back out of it without the stream ever stopping.

Maintaining a Go Tool That Edits /etc/hosts on Every OS

Sat, 03 Feb 2024 19:22:00 -0700

Editing the hosts file sounds like the most boring problem in software. Read a text file, add a line, write it back. Then you find out your binary is being shelled out to from a Ruby Vagrant plugin on a Windows laptop with UAC prompts. Your library is being called in a loop by ddev. And every hosts file you parse was hand-edited by somebody at some point. I’ve been maintaining goodhosts for a few years now. I just spent a chunk of the fall and the holidays on it, so here’s what that looks like.

Practical Cue Example, Produce YAML Config from Go Types

Mon, 31 Jan 2022 09:57:26 -0700

I recently had to spend some time to learn Cue and felt the examples/tutorials were a bit lacking. The paradigm shift to the entire language sort of messed with my head, and some things Cue does were a bit foreign to me. To get started, note that I spent all of my time getting this information from two places: their main docs and a community Cuetorials site. This will be a tutorial on how you can use Cue to generate two different YAML documents, all starting with Go types to generate Cue files.

Free Blog Hosting Using Hugo + Github Pages

Thu, 27 Jan 2022 11:51:20 -0700

Since I just rode this merry-go-round here is a quick overview of how you can get a professional looking personal blog with custom DNS. It takes minimal effort, costs nothing and runs completely out of a single Github Repository.

Prerequisites

You’ll need to do your own homework on how to use Hugo. You should have a Github account and a decent understanding of using git and getting changes committed and pushed to a repo. You should also have a domain and know how to do some basic DNS changes. The only thing you likely can’t get for free is a domain name, since registrars charge registration costs. But you can get introductory $0.99USD domains for the first year if you shop around and don’t care what TLD you end up with. For reference, luth.io cost me $30/year to register with CloudFlare.