Wandering Thoughts


Link: quoting strings and breaking strings across multiple lines in YAML

This StackOverflow answer (alternate link) is an excellent, readable, all in one place answer to the twin questions of how you quote strings in YAML and how you break them across multiple lines. I learned something new about quoting strings from reading it, and I'm definitely going to want this link for future reference the next time I have something complicated to put in YAML. I'm also probably going to use '...' quoting more now that I know how simple it is to quote any stray 's I want in it.

(Via Laurence Tratt.)

YamlMultilineStrings written at 10:18:51; Add Comment


Link: The Difference Between Root Certificate Authorities, Intermediates, and Resellers

Andrew Ayer's The Difference Between Root Certificate Authorities, Intermediates, and Resellers is about exactly that issue in much more detail than what I wrote recently. Although I knew some of the information in this article, other pieces were new to me.

Also very relevant to this area is Ayer's earlier The SSL Certificate Issuer Field is a Lie. This covers what it says in the title and is a fun read; the rabbit hole goes pretty deep.

TLSCAsIntermediatesAndResellers written at 22:41:55; Add Comment


Link: X Window System Basics

X Window System Basics (via) is an interactive walk through of the basic elements of X, starting with windows themselves and various things to do with them. This is a topic that's very relevant to me since I deal with old X programs and an old X window manager that have things like old fashioned iconification of windows. Fiddling around with the interactive demos (which require Javascript) is a great way to see in a concrete way how the nuts and bolts work.

XWindowSystemBasics written at 17:40:40; Add Comment


Link: USB, Thunderbolt, Displayport & docks

USB, Thunderbolt, Displayport & docks (via, also) is a high density 'overview' of the technology of all of these things, or at least the technology of the connectors and connections involved. Since it gets down to the level of the number of lines and lanes (and their speed) involved in USB signaling and so on, it's an overview only from a certain perspective.

Although I read it through once and absorbed some things, I think of it more as a reference work that I can consult for fairly low level details if and when I need to understand some aspect of the entire USB mess (and it is a mess) at some depth. There is certainly a lot there.

USBThunderboltAndMore written at 16:05:16; Add Comment


Link: The MGR Window System

The MGR Window System (via) is a brief introduction to MGR, an interesting and under-mentioned Unix windowing system, including a screenshot. I once used MGR myself and have reasonably fond memories of it, so it's nice to see more writing about it on the Internet.

(And looking at my old entry I see that I linked to this article there in HTTP version. Still, I encourage you to read about MGR. It's a path not taken in Unix window systems.)

TheMGRWindowSystem written at 12:46:19; Add Comment


Link: An opinionated list of best practices for textual websites

An opinionated list of best practices for textual websites by Rohan Kumar is what it says in the subject. I'm not sure I agree with everything in it (and I certainly don't do everything there), but I think it has useful information and it's certainly given me things to think about.

(Since this entire blog is a textual website, I have a decided interest in this area and some opinions of my own.)

TextWebsiteBestPractices written at 13:21:29; Add Comment


Link: Histograms in Grafana (a howto)

Histogram evolution: visualize how a distribution of values changes over time (via) has the article URL slug of 'grafana histogram howto', and the slug is quite accurate. It's a step by step walkthrough of how to do this for a native Prometheus counter histogram metric, which most of them are. It includes copious screenshots, which is especially useful since you have to do all of this through Grafana's GUI and describing GUI actions in text is not necessarily ideal. I've slogged through heatmaps and histograms in Prometheus and Grafana, and this article still taught me something quite useful that I hadn't realized (the 'exclude zeros' setting; I agree with the author that this should be the Grafana default).

PS: Contrary to what the article suggests, heatmap legends aren't always useful, at least in current versions of Grafana. I tried putting a legend on some disk IO latency heatmaps that have very small latencies and the result was not all that readable or clear.

GrafanaHistogramsOpstrace written at 22:36:20; Add Comment


Link: Eric Rescorla's "DNS Security, Part II: DNSSEC"

Eric Rescorla's DNS Security, Part II: DNSSEC (via) is a pretty even handed overview of DNSSEC. Rescorla is respected by Thomas Ptacek, even if they disagree (I think) about DNSSEC.

(Rescorla also has a Part I: Basic DNS for people who need that.)

Related to this is Ptacek's fascinating A Brief, Inaccurate History of DNSSEC (via). This goes with Ptacek's Against DNSSEC (from 2015; this debate has been going on for a while).

RescorlaDNSSSEC written at 23:17:49; Add Comment


Link: Examining btrfs, Linux’s perpetually half-finished filesystem

Ars Technica's Examining btrfs, Linux’s perpetually half-finished filesystem (via) is not very positive, as you might expect from the title. I found it a useful current summary of the practical state of btrfs, which is by all accounts still not really ready for use even in its redundancy modes that are considered "ready for production". There's probably nothing new for people who are actively keeping track of btrfs, but now I have something to point to if people ask why we're not and won't be.

BtrfsHalfFinished written at 12:07:48; Add Comment


Link: "a2d<C-V>3gE: Vim normal mode grammar

"a2d<C-V>3gE: Vim normal mode grammar (via) presents an interesting way of thinking about how Vim normal mode commands are structured. It gave me some things to think about and also taught me a few Vim things I didn't know.

VimNormalModeGrammar written at 17:05:11; Add Comment

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