Alpine Linux, wget, and ca-certificates

| linux | devops |

I’ve been working with Alpine Linux this week. This tiny Linux distribution is an excellent choice for a base docker image or, in my case, for a low power VPS. I love how easy and fast it is to install and configure this distribution.

One stumbling block that I ran into was downloading random things from the internet with wget.

Unable to locally verify the issuer's authority.
To connect to dl.eff.org insecurely, use `--no-check-certificate'

I saw this timely tweet by Joe Gross the other day and decided that rather than ignoring the error messages that wget was throwing I would go and figure out what was wrong.

It turns out that when you make an 83MB distribution you need to cut some of the fat. The ca-certificates package that is common in every Linux Distribution under the sun is missing from the default installation of Alpine.

In order to resolve the angry warnings from wget, you can install the ca-certificates package with the following command:

apk -U add ca-certificates

This will make wget happy, and your server secure. In case you are wondering, skipping this step and running wget with –no-check-certificate totally works. However, it is also inviting a man in the middle attack. Don’t ever do this.

Thank you for reading! Share your thoughts with me on bluesky, mastodon, or via email.

Check out some more stuff to read down below.

Most popular posts this month

Recent Favorite Blog Posts

This is a collection of the last 8 posts that I bookmarked.

Articles from blogs I follow around the net

On concrete examples

I had some great conversations via email over the past couple of weeks with a bunch of different people, discussing all sorts of things that I’ll for sure end up writing about. Today I wanted to briefly touch on the topic of examples, which was pa…

via Manuel Moreale — Everything Feed October 16, 2025

Hacking Workshop for November 2025

For next month, I'm scheduling 2 or 3 discussions of Matthias van de Meent's talk, Improving scalability; Reducing overhead in shared memory, given at 2025.pgconf.dev (talk description here). If you're interested in joining us, please sign up …

via Robert Haas October 16, 2025

Should we be afraid of AI? Maybe a little

Almost exactly a year ago, I wrote a piece for The Torment Nexus about the threat of AI, and more specifically what some call "artificial general intelligence" or AGI, which is a shorthand term for something that approaches human-like intelligence…

via The Torment Nexus October 16, 2025

Generated by openring