4.2 Linux is a free Unix Operating System available on different hardware platforms including PC-compatible machines. Red Hat is one distribution of Linux. Red Hat is easy to install. Security fixes are provided promptly. The most popular free web server.
Response is fast and easy to install.
Highly configurable but needs some time to make it work the way you want. Powerful, easy to compile and install. Easy to compile and install. CGI 2.36 Perl module to facilitate writing of CGI scripts. Easy to compile and install.