Perl Setup Guide — Install Perl and Run Your First Script

In this tutorial, you will learn about Perl Setup Guide. We cover key concepts, practical examples, and best practices to help you master this topic.

Perl installation requires downloading the Interpreter, optionally managing versions with perlbrew, configuring CPAN clients, and verifying the setup with a simple script before exploring language features.

Installing Perl

# Linux (Debian/Ubuntu)
sudo apt install perl

# macOS (pre-installed)
perl -v

# Windows - Download from strawberryperl.com
# or use ActivePerl

# Using perlbrew (version manager)
curl -L https://install.perlbrew.pl | bash
perlbrew init
perlbrew install perl-5.40.0
perlbrew switch perl-5.40.0

Your First Script

#!/usr/bin/perl
use strict;
use warnings;

print "Hello, Perl!\n";
my $name = "World";
print "Hello, $name!\n";  # Variable interpolation

perl hello.pl
# Hello, Perl!
# Hello, World!

CPAN Configuration

# Initialize CPAN
cpan

# Install modules
cpan install JSON::XS
cpan install DBI

# Using cpanm (recommended)
cpan App::cpanminus
cpanm Mojolicious
cpanm Dancer2

Common Mistakes

1. Forgetting use strict; use warnings;

Always start scripts with these. They catch typos and subtle bugs.

2. Wrong shebang line

#!/usr/bin/perl must be first line. Use perl script.pl if shebang is wrong.

3. Not using perlbrew

System Perl is often outdated. perlbrew lets you install and switch between versions.

Practice Questions

1. What does use strict; do? It forces declaration of variables with my, our, or state, preventing typos from creating globals.

2. How do you check Perl version? perl -v or $] variable: print "$]\n";.

3. What is cpanm? A CPAN client that's simpler and faster than the default cpan shell. Install with cpan App::cpanminus.

FAQ

{{< faq question="What is Strawberry Perl?" >}} A Perl distribution for Windows that includes a compiler, making it easy to install CPAN modules that require C compilation. {{< /faq >}}

{{< faq question="Do I need to install CPAN modules as root?" >}} No. Use local::lib to install modules in your home directory: cpanm --local-lib=~/perl5 Module::Name. {{< /faq >}}

{{< faq question="What is the difference between perl and cperl?" >}} cperl is a fork of Perl 5 with additional features and bug fixes. Standard Perl is the official version. {{< /faq >}}

What's Next

Now learn about Perl scalars -- numbers, strings, and undef.