3.2.1. Perl

Perl 5 has been the traditional technology for writing weblets on UNIXes, and is still very commonly used.
mod_perl - a powerful and fully optimized Perl backend for Apache.
Perl is interpreted, but still fast enough for most needs.
Contains efficient, hard-coded primitives and modules for handling most common tasks of web-servers.
Perl code tends to be very compact.
CPAN - The Comprehensive Perl Archive Network - easy downloading, compilation and installation of Perl a diverse range of pre-written modules on UNIX and other systems.
The core Perl language is very extensive, and makes use of many programming elements, and allows for many different programming styles.
Beginning programmers may have trouble understanding the code of more experienced programmers, or write programs in what can be considered a sub-optimal manner.
This may or may not be an advantage.