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How to Install Varnish Cache for Apache on CentOS/RHEL 8

TecMint: Varnish Cache is a free open source, modern and high-performance web application accelerator. It is a fast reverse HTTP proxy that caches content to speed up your web server performance, by storing web content in server memory – in a cache. It is configured to run in front of an origin server such as Apache (HTTPD) webserver.