Perl Review: Features, Installation, and Benefits

Perl is a general‑purpose programming language especially known for its text‑processing, automation, and system‑administration capabilities. Originally created to parse text files, extract information, and generate reports, Perl has gradually evolved to cover a wide range of computing tasks. The official documentation now presents it as a general‑purpose language supporting several paradigms, notably procedural, functional, and object‑oriented programming.

For developers, system administrators, and IT specialists, Perl remains attractive when one needs to automate operations, manipulate textual data, interact with Unix and Linux systems, or leverage a vast catalogue of modules. In this context, it can fit into an open‑source software centric approach, particularly relevant for organisations seeking flexibility and control over their digital environment.

At the time of this review, the current stable branch is Perl 5.44.x. The official maintenance policy states that Perl 5.44.x receives full support, while Perl 5.42.x is the previous stable branch that is also supported.

What Is Perl?

Perl is an interpreted language originally designed for text‑file processing and report generation. Its scope of use has since expanded considerably, especially toward system administration, automation scripts, data processing, and application development.

One of its main strengths lies in its functional richness. Perl offers powerful tools for manipulating strings, regular expressions, files, processes, and structured data. Its status as an open‑source program also allows developers and organisations to use its code, study its inner workings, and contribute to its ecosystem under the terms of its licences.

The CPAN (Comprehensive Perl Archive Network) ecosystem is another key component of the platform. The official Perl website notes that its ecosystem contains more than 42 000 open‑source modules, while the Learn Perl documentation lists over 108 000 modules available on CPAN. These figures use different counting scopes, so they should not be treated as strictly equivalent estimates.

What Problems Does Perl Solve?

Technical teams often look for tools that can automate repetitive operations without having to develop a full‑blown application. Perl meets this need particularly well. 

It can be used to:

• automate system‑administration tasks,
• analyse large text files,
• search and transform information,
• process system logs,
• manipulate files and directories,
• automate maintenance operations,
• communicate with databases,
• develop integration scripts,
• create applications and services in various environments.

Text processing has historically been one of Perl’s strongest areas. The official documentation explicitly mentions its capabilities for working with HTML, XML, and various natural‑language or markup formats.

Key Features and Capabilities

Advanced Text Processing

Perl provides especially powerful tools for working with strings and regular expressions. This characteristic partly explains its historic adoption for file and log analysis.

For a system administrator, a Perl script can, for example, scan a log file, look for specific patterns, extract fields, and produce a usable report.

Versatile Programming

erl is not limited to a single programming paradigm. The official documentation states that it supports procedural, functional, and object‑oriented programming.

This versatility allows developers to adapt their style to the problem at hand, although it can also make some Perl programs harder to understand when they heavily exploit advanced language features.

CPAN Ecosystem

CPAN is a central element of the Perl ecosystem. It enables users to search for, download, build, and install Perl modules. The cpan tool can also manage the dependencies required for module installation.

 Developers can thus avoid re‑implementing many functionalities that already exist as modules.

Database Integration

Perl includes DBI (Database Interface) for accessing various databases. The official documentation lists, among others, Oracle, Sybase, PostgreSQL, and MySQL as systems that can be used with this interface.

Portability

Perl runs on many operating systems. Unix and Linux environments are especially associated with its use, but Perl can also be employed on other platforms.

This portability is valuable for teams that must maintain scripts across multiple infrastructures.

Installation and configuration

Installation of Perl depends on the operating system.

On many Linux distributions, Perl is already present or can be installed via the distribution’s package manager. The Learn Perl documentation recommends verifying the installation with the following command:

perl -v

Linux distributions may use different package managers, such as apt, dnf, pacman, zypper or apk.

Checking the Installed Version

After installation, run:

perl -v

To view local documentation:

perldoc perlintro

he official documentation recommends perldoc perlintro as a starting point for new users.

Installing Modules

The Perl ecosystem allows module installation with several tools. The cpan utility is the official solution, while cpanm, provided by App::cpanminus, also simplifies module installation. 

For example:

cpan App::cpanminus

Then :

cpanm Module::Name

The exact module required obviously depends on the application being developed.

Managing Multiple Perl Versions

In a professional environment, using a Perl version separate from the system‑provided one can be advantageous. The Learn Perl documentation specifically recommends Perlbrew for installing multiple versions and preventing system‑wide upgrades from directly affecting a project’s Perl environment.

Perl Security

Security largely depends on how Perl is used and on the code that is written. The language does provide several mechanisms intended to limit certain risks.

The strict pragma, for instance, turns some constructs that could lead to unexpected behaviour into errors. The official documentation describes it as a mechanism that restricts potentially problematic constructions.

Perl also offers taint mode, designed to control the use of data originating from external sources in sensitive contexts. The security documentation explains how it works with programs run under different privileges and with data coming from outside the program.

These mechanisms should not be presented as an automatic security guarantee. Final security depends on the code, its configuration, the dependencies used, and the execution environment.

An important point concerns CPAN. The CPAN.pm documentation warns that the historic mechanism does not by itself provide a strong security layer for installing third‑party code and describes ways to verify packages via cryptographic signatures.

Perl Use Cases

Perl is especially suited to several categories of technical tasks.

System Administration

Administrators can use Perl to automate operations on files, processes, services, and logs. 

Scripts can:

• analyse log files,
• automate maintenance tasks,
• generate reports,
• manage configuration files,
• transform data,
• execute repetitive jobs.

Text‑Data Processing

Text processing remains one of the most natural use cases for Perl. Its original design was precisely centred on file analysis, information extraction, and report generation.

Professional Development

Perl can also be employed to develop larger applications. Its support for multiple paradigms and its module system enable projects that go far beyond simple automation scripts.

Advantages and disadvantages

Comparison with Alternatives

Perl is not the only language suited to automation, data processing, or general‑purpose development. Python, Ruby, and PHP are notable alternatives, each with different usage domains and ecosystems.

Python is officially described as an interpreted, general‑purpose, object‑oriented language with a syntax designed to stay clear, and a standard library that covers string handling, regular expressions, file systems, Internet protocols, and testing.

Ruby is another interesting alternative. Its official documentation calls it an object‑oriented language and notes that it is well suited for text processing, servers, prototyping, and everyday programming.

PHP is more closely associated with web development. Its official documentation presents it as a general‑purpose scripting language especially adapted to web development and capable of being embedded in HTML.

Perl vs. Python, Ruby, and PHP

This table is not a universal ranking. The best choice depends on the project, the team’s skill set, required libraries, existing infrastructure, and maintenance constraints.

Is Perl Worth Using?

Yes, in the right contexts.

Perl is especially relevant when an organisation already has a substantial body of Perl scripts, when teams possess solid expertise in the language, or when text processing and automation are major requirements.

For a new project, the decision should still be compared with available alternatives. Python may be preferred when a team seeks a generally readable syntax and a very large modern ecosystem. Ruby can be attractive for teams that like its object‑oriented approach and ecosystem. PHP remains particularly relevant for projects heavily focused on web development. The official characteristics of these languages confirm their respective positions.

In a professional setting, Perl can also fit into an Open‑Source Service approach, especially when organisations want to rely on open technologies while receiving tailored support for integration, maintenance, and evolution.

From a professional standpoint, the choice may also consider the availability of an open‑source community, contribution possibilities, team support, and ecosystem sustainability. LINAGORA notably highlights the importance of communities in the development and evolution of open‑source software.

Conclusion

Perl remains a powerful and versatile language, especially interesting for automation, system administration, and text processing. Its longevity rests on comprehensive documentation, a substantial CPAN ecosystem, and a set of features well suited to technical tasks.

Its main professional value is not necessarily to replace Python, Ruby, or PHP systematically, but to solve certain problems efficiently, particularly when dealing with text manipulation, automating operations, or maintaining infrastructures already built on Perl.

For developers, system administrators, and IT specialists, Perl should still be considered when project requirements align with its strengths. For new development, however, it is advisable to evaluate the Perl version, CPAN dependencies, available expertise, and maintenance needs before making a technical decision. In a professional environment, the possibility of obtaining technical support is also a factor to weigh for open‑source technologies used in critical systems, especially when maintenance and security requirements must be covered.