Quick Tip: Fix Apt GPG error NO_PUBKEY

In the Ubuntu (Debian) packaging world of Apt, the use of apt-key has been deprecated (other than apt-key del to remove keys).

I’ve run into errors like the following periodically, and have had to spend more time than I should reminding myself of how to fix the issue:

W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://apt.releases.hashicorp.com jammy InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY DA418C88A3219F7B
Wednesday, February 22, 2023

Quick Tip: Get Absolute Path to Directory Script is Running in

When running a bash script, it’s sometimes convenient to get a fully qualified path to the directory that the source of the running script is in.

I continually have to remind myself of the exact syntax for this tip, so I’ve posted it for posterity. This approach should work around most issues of symlinked files, sourced files, etc.

Tuesday, January 17, 2023

Quick Tip: Run Bash Commands in Parallel

I have a useful script that demonstrates a few different bash techniques.

This script:

  • Executes multiple commands on multiple SSH client hosts
  • Connects to each host in parallel, and waits for all host processes to terminate
  • As a freebie, demonstrates running apt in a non-interactive process
Wednesday, May 18, 2022

Quick Tip: create ico from png or jpg

I regularly have to look up the ImageMagick syntax for converting image files to ico formats when I’m creating a favicon.ico

The convert command, part of the ImageMagick suite, is quite helpful and versatile.

Wednesday, April 24, 2019

Deploy AWS Lambda functions with Terraform

I built a GitHub project to explore and document some basic Terraform scripts, both to learn Terraform, and to figure out how to deploy to AWS Lambda without using serverless or the web UI.

Tuesday, March 5, 2019

Quick Tip: Copy Files from LXC host to LXC Container

Today, I wanted to copy some files to the container filesystem of an lxc container I was spinning up.

There are a number of different approaches to achieve this, and they’re all great, but I wanted the simplest thing I could do, rather than grepping through fstab records, and copying into arcane folders, etc.

Tuesday, June 7, 2016

Quick Tip: Remove Query Param from URL in Go

How to easily remove query string parameters from a url.URL in Go.

Today’s short post shows how simple it is.

Wednesday, June 1, 2016