Link Diary July 2026

• Wolves Do Not Howl at the Moon
• Kitty and Hetzner SSH
• Which Base Linux Distributions Exist?
• Yeri AI: Generate Images and Videos
• WieErWill: Engineering Blog on Rust and Robotics
• TLDR: Technology News in Five Minutes
• Bash Variables with Default Values
• Dealsbe: Directory of Practical AI Tools
• Calculate an Angel Number from Birth Date and Name
• Bash: Check for Substrings
• Bash: if Conditions at a Glance
• Forgejo: Git Hosting for Free Software
• Firecrawl: Web Search for AI Agents
• cheat.sh: The Universal Command-Line Cheat Sheet
• Agent Skills: A Standard for Extensible AI Agents
• Video Picks
  • What Most People Get Wrong About Sunscreen
  • “German Company Builds Batteries with Infinite Lifetime?”
  • Holacracy: Management without Hierarchy
  • “NOBODY Can Predict Aubrey Plaza & Jennifer Lawrence!”
  • BYD Blade 2.0: What the New Cell Can and Cannot Do
  • “FREE Water was ILLEGAL — He Changed That”
  • “Germans DO Have a Sense of Humour” — Jimmy Carr in Frankfurt
  • Best Local AI Models by GPU VRAM

The full moon is only a film setting. Wolves howl regardless of moon phase, time of day, or season, mainly to communicate with the pack and mark their territory.

• https://www.n-tv.de/archiv/Heulen-Woelfe-wirklich-den-Mond-an-article20129443.html

When xterm-kitty is not recognized during SSH, the fallback can be hard to use. Kitty can connect to a Hetzner server with reasonable compatibility.

kitty +kitten ssh user@hetzner-server

DistroWatch lists several hundred distributions, but only a much smaller number are independent base projects: Debian, Arch Linux, Fedora, openSUSE, Gentoo, Slackware, NixOS, Void Linux, Alpine Linux, and Solus.

Yeri AI combines text-to-image, image-to-image, text-to-video, image-to-video, photo effects, templates, and image editing in one workspace. Stable Diffusion Online is mentioned as an additional browser-based image-generation tool.

Open Yeri AI Open Stable Diffusion Online

WieErWill is a personal developer blog covering project logs, architecture notes, talks, embedded systems, Rust, C++, robotics, and practical software engineering.

Open WieErWill

TLDR summarizes interesting stories from startups, technology, and programming in a short daily newsletter. Topics include AI, hardware, DevOps, and software development.

Open TLDR

Bash parameter expansion provides fallback values for unset or empty variables, which is useful for optional script arguments, configuration values, and paths.

NAME=${1-"World"}
echo "Hello, $NAME!"

Dealsbe lists AI tools for writing, image and video generation, research, programming, design, productivity, and automation.

Open Dealsbe

The page explains how to calculate a life path number from a birth date and an expression or destiny number from a full name. Whether the result fits remains a matter of personal interpretation.

Calculate an angel number

The article covers substring checks with wildcard matching, case statements, regular expressions, and grep.

STR='GNU/Linux is an operating system'
SUB='Linux'
if [[ "$STR" == *"$SUB"* ]]; then
  echo "It is there."
fi

A compact overview of if, then, fi, elif, and else, plus numeric comparisons, string and file tests, and logical operators.

if [ "$value" -gt 10 ]; then
  echo "greater than 10"
elif [ "$value" -eq 10 ]; then
  echo "exactly 10"
else
  echo "less than 10"
fi

Forgejo is a lightweight, self-hosted software forge for Git projects. It is developed by a community under Codeberg e.V. and focuses on Free Software, collaboration, federation, privacy, and low maintenance.

Open Forgejo

Firecrawl gives AI agents structured web data by searching websites, extracting clean content, and interacting with pages. Results can be processed as Markdown, JSON, or screenshots.

Open Firecrawl

cheat.sh provides unified access to community-maintained cheat sheets and documentation directly from the browser or terminal.

curl cheat.sh/tar

Open cheat.sh

Agent Skills is an open format for packaging domain knowledge and reusable workflows. A skill is centered on a SKILL.md file and can include scripts, references, and templates. Agents load the full instructions only when a skill is needed.

Open Agent Skills