Add new post about IPv6 connection problems

Gemfile

@@ -15,3 +15,5 @@ group :jekyll_plugins do
   gem "jekyll-include-cache"
   gem "jekyll-algolia"
 end
+
+gem "webrick", "~> 1.8"

_config.yml

@@ -21,12 +21,12 @@ description: >- # this means to ignore newlines until "baseurl:"
   Google search results) and in your feed.xml site description.
 twitter_username: username
 github_username: username
-minimal_mistakes_skin: default
+minimal_mistakes_skin: dark
 search: true
 
 # Build settings
 markdown: kramdown
-remote_theme: mmistakes/minimal-mistakes
+remote_theme: mmistakes/minimal-mistakes@4.26.1
 # Outputting
 permalink: /:categories/:title/
 paginate: 5 # amount of posts to show
@@ -36,6 +36,10 @@ timezone: # https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
 include:
   - _pages
 
+after_footer_scripts:
+  - https://cdn.jsdelivr.net/npm/clipboard@2/dist/clipboard.min.js
+  - assets/js/clipboardrouge.js
+
 # Exclude from processing.
 # The following items will not be processed, by default. Create a custom list
 # to override the default setting.

_posts/2024-06-05-ipv6-connection-problems-on-linux.md

@@ -0,0 +1,30 @@
+---
+title: "IPv6 connectivity problems on Linux"
+categories:
+  - Troubleshooting
+tags:
+  - Linux
+  - IPv6
+  - HTTP
+---
+
+The problem with IPv6 connection got me each time with Git hostings and
+recently with ruby gem registry. I don't know the root of this problem, just
+turned off IPv6 and everything is fine.
+
+There a several ways to do it, though. One helps me with GitLab SSH access and
+second with ruby gem registry.
+
+## Configure SSH to work with IPv4 instead of IPv6
+
+Run `sudo $EDITOR /etc/ssh/ssh_config`, find the field `AddressFamily` and set
+it to `inet`. You are done :)
+
+## Configue NetworkManager to use Link-Local Only Method for IPv6 with corresponding network
+
+Open `Edit Connections...` menu in nm-applet, choose the network you're using
+right now, double-click on it, open `IPv6 Settings` tab and set `Method` to
+`Link-Local Only`. This settings solved my problems with other registers like
+ruby gems and bun.js.
+
+Good luck!

assets/js/clipboardrouge.js

@@ -0,0 +1,70 @@
+// Clipboard
+// This makes the button blink 250 miliseconds
+
+function sleep(ms) {
+  return new Promise(resolve => setTimeout(resolve, ms));
+}
+
+async function buttonBlink(btn, style) {
+  btn.classList.remove("btn-light");
+  btn.classList.add(style);
+  await sleep(250); //Blink ms
+  btn.classList.remove(style);
+  btn.classList.add("btn-light");
+}
+// End
+
+
+// Select highlghted codes
+var codeChunk = document.querySelectorAll("pre.highlight");
+
+// Loop to add buttons
+for (var i = 0; i < codeChunk.length; i++) {
+
+  var pre = codeChunk.item(i);
+  var btn = document.createElement("button");
+  // Prepare button
+  btn.innerHTML = "<i class='far fa-copy'></i>"; // Icon to be displayed on the button
+
+  // Inline styling - may be a new css class, to be added in the next section
+  btn.style.position = "absolute";
+  btn.style.right = "1em";
+
+  // Button: CSS - Add new classes
+  btn.classList.add("btn", "btn--primary");
+
+  // Identifier for ClipboardJS
+  btn.setAttribute("data-clipboard-copy", "");
+
+  // aria-label: btn.setAttribute("aria-label", "Copy to clipboard");
+  // etc.
+
+  // Insert button
+  pre.insertBefore(btn, pre.firstChild);
+
+}
+// End
+
+// Copy to clipboard
+var clipboard = new ClipboardJS("[data-clipboard-copy]", {
+  target: function (trigger) {
+    return trigger.nextElementSibling;
+  }
+});
+
+// Messages and make the button blink
+clipboard.on("success", function (e) {
+  e.clearSelection();
+  buttonBlink(e.trigger, "btn--success");
+  console.info("Action:", e.action);
+  console.info("Text:", e.text);
+  console.info("Trigger:", e.trigger);
+});
+
+clipboard.on("error", function (e) {
+  e.clearSelection();
+  buttonBlink(e.trigger, "btn--danger");
+  console.info("Action:", e.action);
+  console.info("Trigger:", e.trigger);
+});
+// Finish