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    <title>Razeen`s Blog</title>
    <link>https://razeencheng.com/</link>
    <description>Recent content on Razeen`s Blog</description>
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      <title>Let&#39;s Encrypt Launches Gen Y Root Certificate Hierarchy: Revealing Five Future Trends of Web PKI</title>
      <link>https://razeencheng.com/posts/en/letsencrypt-gen-y-pki-five-trends/</link>
      <pubDate>Wed, 26 Nov 2025 22:50:16 +0000</pubDate>
      
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      <description>Let&amp;#39;s Encrypt launches the Gen Y root certificate hierarchy, marking a major transformation in the Web PKI industry. This article provides an in-depth analysis of the five major trends brought about by this update: the end of public Client Auth, the ubiquity of four-level certificate chains, the obsolescence of intermediate certificate pinning, the countdown to 47-day validity, and preparations for post-quantum cryptography, helping developers and operations teams prepare in advance.</description>
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      <title>Automatically Backup Your iPhone to NAS via Wi-Fi</title>
      <link>https://razeencheng.com/posts/en/easy-ways-backup-iphone-over-wifi/</link>
      <pubDate>Sat, 14 Jun 2025 09:40:43 +0800</pubDate>
      
      <guid>https://razeencheng.com/posts/en/easy-ways-backup-iphone-over-wifi/</guid>
      <description>A complete tutorial on automatically backing up iPhone to NAS or other Linux servers via Wi-Fi based on the libimobiledevice open source project. Supports scheduled backups, battery control, backup only when charging, etc., saying goodbye to the tedious operation of manual backups.</description>
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      <title>Reflections on Management Training: A Technologist&#39;s Perspective on the Path to Leadership</title>
      <link>https://razeencheng.com/posts/en/management-training-reflections-from-tech-perspective/</link>
      <pubDate>Sat, 17 May 2025 02:00:00 +0000</pubDate>
      
      <guid>https://razeencheng.com/posts/en/management-training-reflections-from-tech-perspective/</guid>
      <description>A technologist&amp;#39;s reflections after attending a management training course. Explores why managers must care about efficiency, the value of standardization, and how these concepts apply to engineering teams, helping us move from individual contributor to manager.</description>
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      <title>UPS Multi-Device Protection: Safeguarding Your NAS and Linux Server</title>
      <link>https://razeencheng.com/posts/en/ups-multi-device-protection-with-nut/</link>
      <pubDate>Thu, 08 May 2025 10:00:00 +0000</pubDate>
      
      <guid>https://razeencheng.com/posts/en/ups-multi-device-protection-with-nut/</guid>
      <description>This article details how to configure a single UPS to protect multiple devices, including Synology NAS and Linux servers. By implementing NUT (Network UPS Tools), you can achieve graceful shutdowns during power outages, preventing data loss and filesystem damage. Ideal for home server users with multiple devices requiring power protection.</description>
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      <title>From Media Center to AI Assistant: My List of 50 Homelab Services</title>
      <link>https://razeencheng.com/posts/en/homelab-services-2025/</link>
      <pubDate>Sat, 19 Apr 2025 12:00:00 +0000</pubDate>
      
      <guid>https://razeencheng.com/posts/en/homelab-services-2025/</guid>
      <description>This article details 50 practical services deployed in my personal Homelab, covering development environments, home entertainment, AI applications, knowledge management, network proxies, smart home, and more. From Plex media center to GitLab code hosting, from Ollama local AI models to Tesla data monitoring, it comprehensively showcases how self-hosted services can build a digital home ecosystem that enhances quality of life and work efficiency.</description>
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    <item>
      <title>Discussing the Reduction of SSL Certificate Validity to 47 Days</title>
      <link>https://razeencheng.com/posts/en/reduction-if-certificate-validity-to-47-days/</link>
      <pubDate>Sun, 13 Apr 2025 08:00:00 +0000</pubDate>
      
      <guid>https://razeencheng.com/posts/en/reduction-if-certificate-validity-to-47-days/</guid>
      <description>&lt;p&gt;The foundation of trust on the internet is quietly evolving. You may have noticed that the little padlock in your browser’s address bar is becoming more common, indicating that a website uses HTTPS encryption—something that relies on SSL certificates. Today, a significant industry development may have a profound impact on all website operators: the CA/Browser Forum (CABF) has passed a proposal called &lt;a href=&#34;https://github.com/cabforum/servercert/pull/553&#34;&gt;SC-081&lt;/a&gt;, which plans to gradually reduce the maximum validity of publicly trusted SSL certificates to just 47 days! What does this change mean, and how will it affect us? Let’s dive in.&lt;/p&gt;</description>
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      <title>Deploy Your Own Running Page</title>
      <link>https://razeencheng.com/posts/en/build-my-running-page/</link>
      <pubDate>Thu, 10 Apr 2025 00:50:01 +0000</pubDate>
      
      <guid>https://razeencheng.com/posts/en/build-my-running-page/</guid>
      <description>A guide on deploying the Running Page project, automating builds and deployments with GitLab CI/CD, integrating Apple Shortcuts for one-click updates, and syncing with the upstream repository.</description>
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    <item>
      <title>One Year Review and Cost Analysis of Tesla Model Y</title>
      <link>https://razeencheng.com/posts/en/model-y-oneyear-review/</link>
      <pubDate>Sun, 22 Dec 2024 01:10:18 +0000</pubDate>
      
      <guid>https://razeencheng.com/posts/en/model-y-oneyear-review/</guid>
      <description>This article shares a one-year review and cost analysis of using the Tesla Model Y, including the pros and cons in terms of power, handling, space, and safety, as well as long-distance driving experience and purchase cost summary.</description>
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      <title>Replacing Disqus Comments with Self-hosted Waline</title>
      <link>https://razeencheng.com/posts/en/use-waline-to-replace-disqus/</link>
      <pubDate>Tue, 10 Dec 2024 20:56:27 +0000</pubDate>
      
      <guid>https://razeencheng.com/posts/en/use-waline-to-replace-disqus/</guid>
      <description>This article introduces how to use a self-hosted Waline comment system. It also compares several open-source comment systems and provides a detailed explanation of the Waline setup process, including database preparation, data migration, backend configuration, and blog comment modification.</description>
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      <title>Use Prometheus and Grafana to Set Up Your Certificate Monitoring Dashboard</title>
      <link>https://razeencheng.com/posts/en/use-prometheus-and-grafana-monitor-your-certs/</link>
      <pubDate>Sat, 07 Sep 2024 03:43:48 +0000</pubDate>
      
      <guid>https://razeencheng.com/posts/en/use-prometheus-and-grafana-monitor-your-certs/</guid>
      <description>Explore how to use Prometheus and Grafana to monitor SSL certificate validity and visualize management through a detailed Grafana dashboard.</description>
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    <item>
      <title>Server Migration: Lessons Learned from Swapping Linux Disk Boards</title>
      <link>https://razeencheng.com/posts/en/migrate-linux-disk-epiphany/</link>
      <pubDate>Mon, 19 Aug 2024 12:19:45 +0000</pubDate>
      
      <guid>https://razeencheng.com/posts/en/migrate-linux-disk-epiphany/</guid>
      <description>Embarking on a fascinating journey of home network tinkering; with the help of AI, I successfully migrated my Homelab server to a new motherboard without reinstalling the operating system or transferring data. This article documents the challenges and learning experiences I encountered while solving Linux partition and mounting issues, as well as how AI improved problem-solving efficiency.</description>
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    <item>
      <title>Improve Information Sources with RSS (RSShub &#43; Reeder 5)</title>
      <link>https://razeencheng.com/posts/en/improve-information-sources-with-rss/</link>
      <pubDate>Thu, 15 Aug 2024 15:56:27 +0000</pubDate>
      
      <guid>https://razeencheng.com/posts/en/improve-information-sources-with-rss/</guid>
      <description>Build your own RSS feed with RSSHub and use Reeder 5 for efficient management of blogs, media, and Twitter feeds, making information retrieval more concise and efficient.</description>
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    <item>
      <title>This site is automatically translated from the Chinese site</title>
      <link>https://razeencheng.com/posts/auto-translate/</link>
      <pubDate>Wed, 14 Aug 2024 15:56:27 +0000</pubDate>
      
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      <description>originally written in Chinese, automatically translated by AI. Click here to challenge the original text.</description>
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      <title>App Share | AppCleaner - The Uninstaller for Mac</title>
      <link>https://razeencheng.com/app-share/mac-appcleaner/</link>
      <pubDate>Sat, 15 Jul 2023 01:04:50 +0000</pubDate>
      
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      <description>Do you ever uninstall software and find that there are still leftover files on your computer? It gives me a feeling of not fully getting rid of something, and it&amp;rsquo;s very frustrating. But this AppCleaner has helped me solve this problem, so I want to share it with everyone here.
AppCleaner 👈 Recommended Rating: ⭐️⭐️⭐️⭐️⭐️
Mac Free Download and Installation You can use Homebrew to install it directly:
brew install --cask appcleaner Or you can download and install it directly from FreeMacSoft.</description>
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    <item>
      <title>Apps</title>
      <link>https://razeencheng.com/apps/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://razeencheng.com/apps/</guid>
      <description>I get excited when I come across a good software and I want to share it with more people.</description>
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    <item>
      <title>Gallery</title>
      <link>https://razeencheng.com/gallery/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://razeencheng.com/gallery/</guid>
      <description>Capturing life, sharing moments.</description>
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      <title>Goods</title>
      <link>https://razeencheng.com/goods/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://razeencheng.com/goods/</guid>
      <description>Some products I have purchased and had a good experience with, sharing them with everyone.</description>
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      <title>Links</title>
      <link>https://razeencheng.com/links/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://razeencheng.com/links/</guid>
      <description>Learn together, tinker together, share together, grow together~</description>
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