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Explain how Perl can be used to invoke system commands. Discuss the opportunities and challenges in using the following approaches to invoke system commands from

Explain how Perl can be used to invoke system commands.

Discuss the opportunities and challenges in using the following approaches to invoke system commands from Perl:

Exec

System

Backtick

Discuss why you may want to consider using Perl to invoke the following system commands:

PGP

SFTP

SMTP

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