Editing Portal:FreeBSD,OpenBSD,etc (section)

=== Perl in the early FreeBSD base system ===

Early FreeBSD systems included Perl as part of the base operating system. This was normal for many Unix-like systems of the period. Perl was widely used for scripts, installation tools, package tools, and administration. It was also expected by many users coming from Unix and early Internet-server environments.

By FreeBSD 3.0, Perl 5 had replaced Perl 4 as a standard part of the system. The FreeBSD 3.0 release notes state: “Perl4 has now been replaced by Perl5 as a standard part of the system.”<ref>FreeBSD Project, “FreeBSD 3.0 Release Notes,” https://www.freebsd.org/releases/3.0R/notes/, accessed July 3, 2026.</ref>

This was historically important because Perl 5 was a much more capable language than Perl 4. Perl 5 brought references, modules, lexical variables, object-oriented programming support, and a modern CPAN ecosystem. For FreeBSD users and developers, having Perl 5 in the base system meant that Perl scripts could be assumed to exist on a standard FreeBSD installation.

That convenience also created a problem. Once Perl was part of the base system, parts of FreeBSD could start depending on it. Upgrading Perl then became tied to upgrading the operating system itself.