In offline environments (specifically those where you can’t use wget or yum), we often need to compile and install Linux-based operating systems ourselves.
At that point, version dependencies become a real headache. Of course, we could use Docker to solve this.
But if your offline environment also restricts uploads and downloads, and the internal system versions are unpredictable, it becomes an even bigger pain. So I found a great place to download Linux RPM packages:
It solves the problems of operating system compatibility, system version dependencies, and software dependency management.