Subfolders
Latest "Articles" Articles
Workshop » Reference Section » Grimoires » IT » Platforms » MacOS » Networking

SSH into local mac, error “WARNING- REMOTE HOST IDENTIFICATION HAS CHANGED!”

SSHing into a local MacOS machine at address "macbook.local", I suddenly got this:

[code]@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Someone could be eavesdropping on you right now (man-in-the-middle attack)! It is also possible that a host key has just been changed. The fingerprint for the ED25519 key sent by the remote host is SHA256:oKCEu3pDdq7xBhSPZwOzR2q0eWTvfphtvn3D4Bjz8v4. Please contact your system administrator. Add correct host key in /Users/username/.ssh/known_hosts to get rid of this message. Offending ECDSA key in /Users/username/.ssh/known_hosts:147 Host key for macbook.local has changed and you have requested strict checking. Host key verification failed.[/code]

The solution was to run ssh-keygen -R macbook.local then try the ssh again. Then it asked me whether or not to accept the key, instead of rejecting it:

[code]$ ssh username@macbook.local The authenticity of host 'macbook.local (fe80::1890:fd32:c304:69cd%en0)' can't be established. ED25519 key fingerprint is SHA256:oKCEu3pDdq7xBhSPZwOzR2q0eWTvfphtvn3D4Bjz8v4.…
| Permanent URL: https://michaelkupietz.com?p=32588  |  Share this  |  Embed link  |  Webmentions are: off
Workshop » Reference Section » Grimoires » IT » Platforms » MacOS » Apps

Xbar/BitBar gives “Couldn’t Posix Spawn” for script.

Apple's quarantine system can cause this. Try

[code]chmod +x com.apple.quarantine /path/to/script.sh xattr -d com.apple.quarantine /path/to/script.sh[/code]

In my experience only the xattr is needed but the chmod might help and couldn't hurt.

| Permanent URL: https://michaelkupietz.com?p=32568  |  Share this  |  Embed link  |  Webmentions are: off
Workshop » Reference Section » Grimoires » IT » Platforms » Web » Performance/SEO

If CSS animations cause a layout shift during rendering, even if they’re on compositable attributes

If CSS animations cause a layout shift even if they're on compositable ettributes, look for clip paths, overflow:hidden, or css filters on them or their ancestors.

| Permanent URL: https://michaelkupietz.com?p=32561  |  Share this  |  Embed link  |  Webmentions are: off
Workshop » Reference Section » Grimoires » Trading Education Notes » Explainers, Definitions, & Terminology

Put Options or Collar Can Reset Your Short-Term Capital Gains Holding Period For Stocks To Zero, Or Worse

It's a bit complicated, but under IRS Title 26, most* positions which combine normal stocks and options on that stock which hedge or lower the risk of losses are considered a "straddle" for tax purposes.

https://www.law.cornell.edu/cfr/text/26/1.1092(c)-1:

(a) In general. Section 1092(c) defines a straddle as offsetting positions with respect to personal property. Under section 1092(d)(3)(B)(i)(I), stock is personal property if the stock is part of a straddle that involves an option on that stock or substantially identical stock or securities.

Stocks or options held longer than 12 months may be subject to lower long-term capital gains tax rates. However, if certain option positions are purchased on a later date than the stock, but within the initial 12-month period, this resets the stock's short-term holding period to begin again from zero on the day after the option positions are closed.

So if you hold a stock for…

| Permanent URL: https://michaelkupietz.com?p=32461  |  Share this  |  Embed link  |  Webmentions are: off
private » Programming Hacks Used In This Site
Algorithms & Old Lace: LLM Poisoning For Personal Websites
Posted inCode & Algorithms Posted in genresArtificial IntelligenceGeek StuffWeb DevelopmentWordpress CodingGrody Technical DetailsPHP

Rage Against The Machine: Algorithms & Old Lace: LLM Poisoning For Personal Websites

Private AIs: They're Watching You

Last year my friends in an Indieweb meetup began to notice that information about them was turning up in LLMs... some comically inaccurate, some uncannily personal. As a group of personal website developers, we knew that much of the information must've been scraped of our website.

It might not be apparent reading my site, but I've always been a little careful about what information I allow about myself on the web. It's near impossible to prevent personal information from leaking out, and my name is unique enough that I'm not hard to find. I had an unfortunate incident with an online stalker a number years ago and since then have always been careful. I also once had a real-life harasser who broke into my home, although that was a much different and more complex situation. But together these made me aware that…

| Permanent URL: https://michaelkupietz.com?p=32410  |  Share this  |  Embed link  |  Webmentions are: off
Workshop » Reference Section » Grimoires » IT » Platforms » Linux » Packages » PHP

Enable PHP 8.4 in Apache on Debian

According to the installer, to enable PHP 8.4 FPM in Apache2 do:
a2enmod proxy_fcgi setenvif
a2enconf php8.4-fpm

| Permanent URL: https://michaelkupietz.com?p=32397  |  Share this  |  Embed link  |  Webmentions are: off
private » Programming Hacks Used In This Site

War And Precedence: Plugin positioning of unpositioned elements that aren’t yet positioned by later-loading stylesheets: A CSS Odyssey

So, I had a crazy problem. You'll notice that there's various draggable elements on this site... such as the "Kupietools" plugin tabs seen at left, the occasional "the site is being worked on right now" notices that pop up, etc. You can drag them around with your mouse.

This is done with a plugin (also available as a standalone javascript module, a few versions behind the plugin as I write this) that retrofits code onto various HTML elements by giving the plugin the classnames it needs to make interactive.

I was doing some optimization on the site loading to speed things up, such as getting WordPress to load a lot of CSS file late so as not to interfere with initial page load stats. (This is a whole art, beyond the scope of this article.)
Suddenly…

| Permanent URL: https://michaelkupietz.com?p=32266  |  Share this  |  Embed link  |  Webmentions are: off
Workshop » Reference Section » Grimoires » IT » Platforms » Web » Email setup)

Resolving cloudflare error “The number of lookups on your SPF record exceed the allowed limit of 10. This will result in emails failing SPF authentication”

I got the error "The number of lookups on your SPF record exceed the allowed limit of 10. This will result in emails failing SPF authentication" in my Cloudflare DNS dashboard.

My spx record for, say, kupietz.com was "v=spf1 include:_spf.myEmailHost.com include:kupietz.com ~all"

Turns out, the problem is, every include can get parsed to be multiple servers. the include:kupietz.com apparently causes a recursive loop, creating more than 10 lookups. I updated it to "v=spf1 ip4:[my server's external IP address] include:_spf.google.com ~all", removing the recursive lookup, and adding my server's IP so it can send me administrative notices.

Also today my ISP changed my IP address unexpectedly... all DNS updated.

| Permanent URL: https://michaelkupietz.com?p=32179  |  Share this  |  Embed link  |  Webmentions are: off
Workshop » Reference Section » Grimoires » IT » Platforms » Linux » Packages » rsync & rsnapshot

How to backup a WordPress site via SSH

To make a complete local backup of a remote WordPress install over SSH, you need to perform two distinct steps:

  1. Download the files (using rsync).
  2. Export and download the database (using mysqldump piped through ssh).

Here is the step-by-step guide.

Prerequisites
  • SSH Access: You need the username, host (IP or domain), and password (or SSH key) for the remote server.
  • WordPress Path: You need to know where WordPress is installed (e.g., /var/www/html or /home/user/public_html).
  • Database Credentials: You will need the database name, user, and password. (I will show you how to find these below).
Step 1: Find Database Credentials (Optional)

If you don't know your database login details, run this command to read them from your remote wp-config.php file: ssh user@remote-server.com "cat /path/to/wordpress/wp-config.php" | grep 'DB_'

Note the DB_NAME, DB_USER, and DB_PASSWORD for Step 2.

Step 2: Download the Database (SQL Dump)…
| Permanent URL: https://michaelkupietz.com?p=32164  |  Share this  |  Embed link  |  Webmentions are: off
Writing » Topical Writing
A Milestone Passed: Brief Thoughts On AI’s Increasingly Convincing Simulation of Humanness
Posted inWriting Posted in genresArtificial IntelligenceTechnosociology

¡AI Caramba!: A Milestone Passed: Brief Thoughts On AI’s Increasingly Convincing Simulation of Humanness

Oct. 11, 2024

Those who've spoken to me about it know that I, through much firsthand experience, call myself "a huge AI enthusiast and skeptic". Generative AI is an amazing technology that has personally benefitted me in ways that were strictly science fiction just a few years ago—but, lot of unmerited claims are made, and a lot of trust put in it that isn't really justified by the technology.

But then there's yesterday's article in Ars Technica.

As a technologist, there are times I remember seeing news articles that seemed to me to really show we've passed a technological benchmark, just things I noticed were the first time I saw things take a new step. This article was that.

The background is this: Google has a new AI called NotebookLM that, when fed material, generates a simulated audio podcast of two very stereotypical podcasters discussing it. I…

| Permanent URL: https://michaelkupietz.com?p=32093  |  Share this  |  Embed link  |  Webmentions are: off
Workshop » Reference Section » Grimoires » Trading Education Notes » Hypotheses to be tested
Posted inTrading Grimoire

Size Down

I heard an interview with a trader (https://www.youtube.com/watch?v=1ETvTftY-tw) who never takes a trade that he is not willing to accept a complete loss on. I'm thinking about that PLTR protective bear spread that I sold when it was halfway to a $600 loss,, and price moved so it would have ended far in profit. By his philosophy: I should have halved the profit, not done that. I got greedy. His way of thinking is I should have taken half the size spread instead or not taken the trade at all. But I don't know, because it was protective... I was trying to protect against a loss. (Actually I should have used a collar.) In another video, this same guy said "Stop swinging for home runs. Start stacking small trades." Which fits.

He said "I only enter trades where if it goes to zero, I'm still good." He's limiting…

| Permanent URL: https://michaelkupietz.com?p=31991  |  Share this  |  Embed link  |  Webmentions are: off
Workshop » Reference Section » Grimoires » Trading Education Notes » Hypotheses to be tested
Posted inTrading Grimoire

Get Really Good At One Thing

Everybody seems to say this. For me it could be the strategy I've been working on paper trading lately. But everyone says lack of focus will cost you.

| Permanent URL: https://michaelkupietz.com?p=31988  |  Share this  |  Embed link  |  Webmentions are: off
Workshop » Reference Section » Grimoires » Trading Education Notes » Hypotheses to be tested
Posted inTrading Grimoire

Patience

You need patience. You can't say "I don't want to wait, I might miss the trade." You wait for confirmation and then only get in if you didn't miss the trade.

Lack of confirmation doesn't mean you're not wrong. Nor does confirmation mean you're right. But being right by not waiting for confirmation will cost you. You can't fomo the money you miss by doing this.

| Permanent URL: https://michaelkupietz.com?p=31986  |  Share this  |  Embed link  |  Webmentions are: off
Workshop » Reference Section » Grimoires » Trading Education Notes » Explainers, Definitions, & Terminology
Posted inTrading Grimoire

Open Interest

Open interest in options is how many live contracts are currently held.

Larry Williams points out that when there's a lot of open interest, there's nobody left to buy. It's not necessarily bullish. In fact it depends whose interest is open—institutional is bullish. Retail is bearish because they don't know what they're doing. https://www.youtube.com/watch?v=Qp6S0Onz_iw

| Permanent URL: https://michaelkupietz.com?p=31976  |  Share this  |  Embed link  |  Webmentions are: off
Workshop » Works In Progress » Writing Works in Progress » The Five-Ingredient Cookbook
Posted inRecipes Posted in genresWork-In-Progress

Easy Good Fake Custard

A favorite snack of mine—feels like junk food, but not too bad, filling, and super-easy.

Take about 12oz vanilla yogurt. I use cream-top full-fat yogurt.

Add a couple of splashes chocolate extract. You have to be careful, unlike real chocolate, more chocolate extract is not better... it's a little tart. Ideally I suppose you could just use unsweetened cocoa powder, I'm particular to the Hershey's unsweetened dark cocoa, but the store over here has been out lately.

Two reasonably heaping teaspoons of coconut flour.

Mix it all together really well.

And that's it! The coconut flour gives it rich texture and a nice flavor, which combines well with the chocolate and vanilla. I like to eat it with a very small spoon, so I can savor it. It's not that much like custard, but, it manages to hit enough of the same notes that it's a pretty…

| Permanent URL: https://michaelkupietz.com?p=31955  |  Share this  |  Embed link  |  Webmentions are: off
Visual Art » Generative Illustrations » Interesting Leftovers & Bonus Galleries
Posted inImage Gallery Posted in genresFantasy IllustrationAI Generative Illustration

Oddfellow Outtakes

Posted for a friend, here's all the sets of images I generated working on "You Can Tuna Oddfellow, But….", from which the final gallery was selected.

| Permanent URL: https://michaelkupietz.com?p=31933  |  Share this  |  Embed link  |  Webmentions are: off
Writing » Anecdotal Evidence (True Stories) » Essay-Length Memoirs
Forever In My Heart: Experiencing Jimi
Posted inWriting Posted in genresAnecdotal EvidenceTravel & AdventureMemoirs & Reflections

A Memoir From The Road: Forever In My Heart: Experiencing Jimi

November 27, 2018

I'm staying at my dad's place in Florida right now. I've been on the road for a few months.

It struck me this morning, waking up in Dad's guest room, that this past August I let the 25th anniversary of the day I first quit th' job and hit th' road—August 12, 1993—slip by, unremarked upon.

I realized it today because today is the 25th anniversary of November 27 of that same year, nearly as important a day in my personal canon. I slept the night of November 26, 1993 in my car in a rest area outside of Tacoma, WA, as I'd been doing for the better part of a week, and after my customary free cup of morning coffee courtesy of the local VFW post volunteers at the rest area, I headed over to the Last Exit On Brooklyn cafe in Seattle's University District, as…

| Permanent URL: https://michaelkupietz.com?p=31911  |  Share this  |  Embed link  |  Webmentions are: off
Visual Art » Generative Illustrations » Experiments & Studies
Posted inImage Gallery Posted in genresFantasy IllustrationAI Generative Illustration

Character Art Experiment: You Can Tuna Oddfellow, But….

These are some character studies I did of Tuna Oddfellow, the famous Second Life (and, increasingly, real life) alter ago of an old friend.

This is a bit of a long gallery, usually I'd generate a bunch of these and narrow it down to just the favorites. Haven't done that with this yet.

| Permanent URL: https://michaelkupietz.com?p=31902  |  Share this  |  Embed link  |  Webmentions are: off
Workshop » Reference Section » Grimoires » Trading Education Notes » Explainers, Definitions, & Terminology
Posted inTrading Grimoire

Trading Thesis

Traders refer to a "thesis" a lot. I've come to believe this is just jargon for a hypothesis. "I think it will do this".

| Permanent URL: https://michaelkupietz.com?p=31880  |  Share this  |  Embed link  |  Webmentions are: off
Workshop » Reference Section » Grimoires » Trading Education Notes » Options Trading Mindset
Posted inTrading Grimoire

Options Are For Strong Conviction Trades

I got some advice recently that I liked: options are for strong conviction trades. "I think this might work" is for shares trades, not options.

"This is working as expected" is when you keep an options trade open.

"This still has a chance it might work as expected" is when you close an options trade. Maybe reopen a smaller position with shares if you absolutely have to gamble.

Pretty much, I'm thinking, whenever you think "It still might..." it's time to close the options trade. The thesis is broken.

| Permanent URL: https://michaelkupietz.com?p=31872  |  Share this  |  Embed link  |  Webmentions are: off
Workshop » Works In Progress » Writing Works in Progress
Posted inI Can't Believe It's Not Poetry! Posted in genresWork-In-ProgressHaikuTomfoolery

Haikus

Haikuity

This would be haiku,
But it only has two lines.
Oh, wait — nevermind.

This is a haiku.
You can tell because it's, uh,
not everything else?

This, too, is a hai
ku, even though it's labored
I still got it right.

Someday maybe this,
too, will be a haiku, dude,
but it just ain't now, man.

Ere, now I follow
the plain footsteps of Basho
but without his skill.

Indieweb Haikus

Occasionally I visit the Indieweb Chatroom when nobody is there and leave haikus.

the lone web dev sighs
soft, in the empty chat room
indieweb haiku
  8/9/2025

The empty chat room.
The placid textarea
bears no hacker wit.
  11/20/2025

| Permanent URL: https://michaelkupietz.com?p=31836  |  Share this  |  Embed link  |  Webmentions are: off
Workshop » Reference Section » Grimoires » IT » Platforms » Linux » Packages » n8n
Posted inIT Grimoire

Starting a temporary instance of N8N accessible via IPv4 over the local network

N8n by default binds to localhost, and even binding it to listen on all interfaces, it still by default listens only for IPv6. You also may want to tell it to not use the Secure Cookie if you don't want to set up an SSL certificate or sign up for their cloud service. Make sure you only have it reachable on the local network if you do this, you don't want to open your instance to the entire world.

N8N_SECURE_COOKIE=false N8N_HOST=0.0.0.0 N8N_LISTEN_ADDRESS=0.0.0.0 npx n8n

Remember to open port 5678 on the machine's firewall if necessary.

| Permanent URL: https://michaelkupietz.com?p=31770  |  Share this  |  Embed link  |  Webmentions are: off
Home, News & Info
Feed: all site articles, by date
Posted inNews & Info Posted in genresFeedsSite Info & NavigationSocial Media

Hungry?: Feed: all site articles, by date

This is (almost*) the entire contents of the site, all articles and blog posts from newest to oldest, with preview excerpts.

  • You can see just the articles: on the Articles category page (not to be confused with the /Latest news page, which is more conversational than a list of posts and may include personal news about me in addition to site news)
  • Just the blog posts: on the dedicated Blog or nearly-identicalBlog Posts category page.

*Individual movie reviews won't get posted on this page. I write too many of them, it would drown everything else out.


| Permanent URL: https://michaelkupietz.com?p=31688  |  Share this  |  Embed link  |  Webmentions are: off
Workshop » Works In Progress » Writing Works in Progress
Posted inWriting Posted in genresWork-In-Progress

Laws Of The Land

This is my placeholder scratchpad for what will be my page of rules of thumb, natural laws, and other such handy guidelines.

1. Child rearing

Keep a parent's vigilant eye, and keep the kid away from high stuff and sharp stuff and hot stuff and anything with teeth and no training. You'll do fine.

2. Kupietz's Henriksen Conjecture

As described on my movie reviews page: Lance Henriksen will be the last to die in any horror movie he is in.

I'll be adding to this as I remember these, until it grows into an article.

| Permanent URL: https://michaelkupietz.com?p=31651  |  Share this  |  Embed link  |  Webmentions are: off
Visual Art » Generative Illustrations » Requests & Contest Submissions
13 Ghosts
Posted inImage Gallery Posted in genresMonstersSupernaturalVirtual PhotographyAI Generative Illustration

Grim Grinning Ghosts Come Out To Socialize: 13 Ghosts

Some virtual spectral photography to spookify your Halloween. True fact: none of these AI-generated images had ghosts in them when I prompted them. WoooOOOOoooo! 👻

I believe I originally made these as a Saturday Monster Challenge but I can't recall when. I'll update if I run across the original info.

| Permanent URL: https://michaelkupietz.com?p=31614  |  Share this  |  Embed link  |  Webmentions are: off
Workshop » Reference Section » Grimoires » IT » Applications » Web Browsers » Plugins

Block Instagram share posts from Facebook’s “all” feed with uBlock Origin

Abstract:

With the browser plugin uBlock Origin, you can block shares from Instagram with the custom rule:

www.facebook.com##.html-div:has(a[href*="www.instagram.com"])

Note: Facebook changes their css often. This may not work for long.

Also, uBlock Origin is not always the fastest plugin, you may see the Instagram posts briefly on your screen before it removes them.

How to Block Instagram Shares from Facebook Using uBlock Origin: A Complete Guide

Social media platforms have become increasingly interconnected, with content from one platform frequently appearing on another. For Facebook users, this often means encountering Instagram shares in their news feed—sometimes from accounts they follow on both platforms, creating redundant content, and sometimes from accounts they don't follow on Instagram at all, courtesy of Facebook's algorithmic recommendations.

If you're looking to curate a cleaner Facebook experience by filtering out these Instagram cross-posts, browser extensions like uBlock Origin offer a powerful solution through custom…

| Permanent URL: https://michaelkupietz.com?p=31606  |  Share this  |  Embed link  |  Webmentions are: off
Workshop » Works In Progress » Writing Works in Progress » The Five-Ingredient Cookbook

Ketoriffic Tuna Pig Salad au Gratin (with non-keto variation)

This is a regular snack around my place.

Ingredients:
1 large (7oz unopened) can tuna, drained
2 thin slices ham
healthy dollop or two of mayonnaise
red Tabasco sauce
black pepper
optional: lemon pepper
powedered garlic
shredded cheese of your preference

1. Put tuna in a large bowl
2. shred ham slices and add
3. add healthy dollop or two of mayonnaise
4. Several dashes of Tabasco sauce. This is one of the exceedingly rare instances where you don't want to overdo it with Tabasco sauce... just a dash or two. This is because we're about to overdo it with the black pepper, and surprisingly, they don't mix.
5. Add garlic to taste... I like a lot.
6. Add pepper. Now, I have a standard rule of them for how much black pepper you need to add…

| Permanent URL: https://michaelkupietz.com?p=31547  |  Share this  |  Embed link  |  Webmentions are: off
Workshop » Reference Section » Grimoires » IT » Platforms » MacOS » Networking

Prevent MacOS from locking screen when you disconnect screen sharing

I screenshare into a Mac for playing video on my TV, and had an intermittent problem where Firefox would not play video while screen sharing was connected, but then locked the screen as soon as I disconnected.

It turns out that if the screen is locked when you log in via screensharing, MacOS defaults to locking it again when you disconnected, and, being MacOS, the ability to turn this off has been removed from the UI.

Enter this in terminal to turn it off: sudo defaults write /Library/Preferences/com.apple.RemoteManagement RestoreMachineState -bool NO

| Permanent URL: https://michaelkupietz.com?p=31545  |  Share this  |  Embed link  |  Webmentions are: off
Code & Algorithms » Web
Tech note: How To Export or Import Notes from the “Webstickies” Extension In Firefox
Posted inCode & Algorithms Posted in genresBrowser PluginsHow-ToJavascript

Free Your Mind, And Your Sticky Notes Will Follow: Tech note: How To Export or Import Notes from the “Webstickies” Extension In Firefox

Amongst my most-used browser extensions is Webstickies by Lawrence Hook, which allows you to leave a permanent "sticky note" on any web page. It's available for both Firefox and (yuck, ptui) Chrome, although I only use it in Firefox.

However, the one thing it lacks is an import/export functionality. For $10, you can get access to "Cloud Sync" for your notes—yes, another unneeded "cloud integration" where local functionality would have been superior.

Consider this side-by-side feature comparison:

Local Import/Export Cloud Sync Transfer notes between browsers or computers ✔ ✔ Allows the plugin developer to make some money selling the use of infrastructure that shouldn't strictly be needed ❌ ✔ Need to literally copy down every single note by hand, one by one, to get them out of the extension ❌ ✔ Email yourself a full copy of your notes for safekeeping ✔ ❌…
| Permanent URL: https://michaelkupietz.com?p=31410  |  Share this  |  Embed link  |  Webmentions are: off