cpan or cpanm (this article) can be used to install a Perl module.

• Install a module using cpanm (this article)
• Install a module using cpan

Before installing a module, you may want to use the perldoc command to determine if the module is installed.

perldoc -l Net::SSH:Perl

Or using inline Perl.

perl -e "use Net::SSH::Perl"

Or using instmodsh.

~]# instmodsh
Available commands are:
   l            - List all installed modules
   m <module>   - Select a module
   q            - Quit the program
cmd? l
Installed modules are:
   Alien::Build
   Alien::GMP
   Alien::m4
   Capture::Tiny
   Crypt::Curve25519
   Crypt::IDEA
   CryptX
   Digest::BubbleBabble
   ExtUtils::MakeMaker
   FFI::CheckLib
   File::Which
   File::chdir
   Math::GMP
   Math::Int64
   Mojo::DOM58
   Net::SFTP
   Net::SSH::Perl
   Path::Tiny
   Perl
   Sort::Versions
   String::CRC32
   Test::Simple
   install
   local::lib
cmd? q

If you installed Perl using apt-get (Debian, Ubuntu), dnf or yum (CentOS, Fedora, Red Hat) then apt-get, dnf or yum can be used to install cpanm.

dnf install cpanminus

If you installed Perl from source code using make, then the perl -MCPAN command can be used to install cpanm.

perl -MCPAN -e "install App::cpanminus"

Or using cpan.

cpan install App::cpanminus

Here is how you would install a module using cpanm.

cpanm the::module

For example.

cpanm JSON::Create

If the install fails and you are comfortable with ignoring the failed tests, you can try to install the module using the --force flag.

cpanm JSON::Create --force

A successful install of a module that is not already installed will return the following.

Successfully installed module::name-version

A successful update of an already installed module will return the following.

module::name is up to date. (version)

After the module is installed it's probably a good idea to create a boilterplate Perl script that contains the module.

#!/usr/bin/perl
use strict;
use warnings;
use Net::SSH::Perl;

And then use the perl command with the -c option.

~]# perl -c /path/to/example.pl
example.pl syntax OK

On the other hand, if there is some issue, something like this may be returned.

~]$ perl -c /path/to/example.pl
Can't locate Net/SSH/Perl.pm in @INC (you may need to install the Net::SSH::Perl module) (@INC entries checked: /usr/local/bin/perl5.38.2/lib/site_perl/5.38.2/x86_64-linux /usr/local/bin/perl5.38.2/lib/site_perl/5.38.2 /usr/local/bin/perl5.38.2/lib/5.38.2/x86_64-linux /usr/local/bin/perl5.38.2/lib/5.38.2) at example.pl line 4.
BEGIN failed--compilation aborted at example.pl line 4.