Cygwin安装镜像下载权限拒绝问题排查及Mingw替代下载源求助

Cygwin Permission Denied During Installation #

That error message fatal: Can't open C:\Users\Home\Documents/http%3a%2f%2fmirror.clarkson.edu%2fcygwin%2f/noarch/release/base-cygwin/base-cygwin-3.8-1.tar.xz.tmp for writing: Permission denied usually stems from permission conflicts with your download directory or the installer lacking sufficient privileges. Here’s how to fix it:

• Run the installer as Administrator: Right-click the Cygwin setup executable and select "Run as administrator". This grants the installer the necessary access to write files in protected folders like your Documents directory.
• Verify Documents folder permissions:
  1. Right-click your Documents folder → Properties → Security tab.
  2. Select your user account and ensure the "Write" permission is enabled. If not, click "Edit" to add this permission temporarily (you can revert it later if needed).
• Switch to a custom download directory:
  When the setup wizard asks where to store downloaded files, skip the default Documents folder. Create a new folder like C:\Cygwin_Downloads, select it, and confirm your user account has full write access to this location. This avoids permission issues in system-protected user folders.
• Clean up leftover installation files: Failed installs often leave locked or corrupted temporary files. Navigate to the path in the error message (C:\Users\Home\Documents/http%3a%2f%2fmirror.clarkson.edu%2fcygwin%2f) and delete the entire folder to remove these blockers.
• Temporarily disable antivirus/firewall: Security tools sometimes block installers from writing files. Turn off your antivirus or firewall briefly, run the installer, then re-enable them once the process completes.

Alternative MinGW Download Sources (When SourceForge is Blocked) #

If SourceForge is inaccessible, you have several reliable options to get MinGW:

• Domestic Chinese mirror sites:
  • Tsinghua University Mirror: Hosts full MinGW packages, including installers and individual components. You can browse and download directly from their MinGW repository.
  • Peking University Mirror: A trusted source with up-to-date MinGW builds.
  • University of Science and Technology of China Mirror: Offers a comprehensive collection of open-source software, including MinGW.
• GitHub releases: Check the official MinGW project’s GitHub repository for precompiled installers or binary packages. Many MinGW-related projects (like MinGW-w64) host their latest releases directly on GitHub.
• Package managers: Use tools like Chocolatey or Scoop to install MinGW. These managers automatically handle downloads from working sources, so you don’t need to hunt for mirrors manually. For example, with Chocolatey, run choco install mingw in an elevated command prompt.

内容的提问来源于stack exchange，提问作者Gaurav