Blog

  • Fix the “431 Request Header Fields Too Large” Error

    If you’ve ever encountered the frustrating 431 Request Header Fields Too Large error, you know how it can bring your web app or site to a halt. This error occurs when the HTTP request headers sent by your browser exceed the size limits that your server or reverse proxy allows. Headers often include cookies and…

  • Recover a Corrupt Google Cloud VM with Disk Space Issues Caused by Docker

    Google Cloud VMs can sometimes get stuck or become inaccessible due to disk space exhaustion — often from leftover Docker images, containers, and volumes accumulating after CI/CD pipelines. Here’s a clear, practical step-by-step guide to restore your VM and clean up Docker efficiently. Scenario Step 1: Create a Rescue VM and Attach the Corrupt Disk…

  • Why Some “Copycat” Companies Succeed Despite Competition

    Even with existing ideas, execution beats originality in many real-world cases. Here’s why they can succeed: 1. Better Execution 2. Better Timing 3. Focused Niche / Geography 4. Superior Distribution / Growth Engine 5. Brand Positioning or Pricing Why VCs Often Don’t Like “Copycat” Models They are playing a different game: 1. VCs Seek Asymmetric…

  • Automate Docker, Docker Compose and GitLab Runner deployment on Ubuntu

  • Fix and Launch ScriptCommunicator on Ubuntu (and missing Qt dependencies)

    ScriptCommunicator is a powerful Qt-based serial port communication tool, popular among embedded developers and makers. Here’s a straightforward guide to get it running on Ubuntu. Step 1: Download ScriptCommunicator Step 2: Extract the package Unpack the archive: tar -xvzf ScriptCommunicator.tar.gzcd ScriptCommunicator Step 3: Install missing Qt dependencies Ubuntu may miss some Qt libraries. Install them:…

  • Fixing GitLab Runner Shell Executor Permission Issues on Ubuntu 20-25

    The Issue: The error typically occurs when the GitLab Runner shell executor doesn’t have the necessary permissions to access or execute files in the /home/gitlab-runner directory. This can happen if: The Solution: A straightforward fix is to remove all dotfiles (.*) in the /home/gitlab-runner directory. These files might be causing the permission errors, especially if…

  • How to Fix Cursor AppImage Sandbox Error on Linux and Add It to Your Desktop

    If you downloaded the Cursor editor as an AppImage on Linux, you may see this error when trying to run it: The setuid sandbox is not running as root. Common causes: * An unprivileged process using ptrace on it, like a debugger. * A parent process set prctl(PR_SET_NO_NEW_PRIVS, …)Failed to move to new namespace: PID…