perl
Perl is a popular command line tool and scripting language known for its flexibility and powerful text processing capabilities. It was created by Larry Wall in 1987 and is designed to be a practical language for both system administration tasks and general-purpose programming. Perl stands for "Practical Extraction and Reporting Language."
As a command line tool, Perl allows you to execute Perl scripts directly from the terminal by invoking the 'perl' command followed by the script name. It supports numerous operating systems, including Unix, Linux, and Windows.
Perl is known for its strong support for regular expressions, making it ideal for tasks involving pattern matching and text manipulation. It also offers built-in functions for file handling, network programming, and system administration tasks such as file and directory manipulation, process management, and socket programming.
Perl provides a vast standard library, known as CPAN (Comprehensive Perl Archive Network), which consists of a wide range of modules contributed by the Perl community. These modules offer additional functionality, making it easier to tackle complex tasks.
Perl's syntax is often described as a blend of shell scripting, C, and awk. It allows for both procedural and object-oriented programming paradigms, giving developers the flexibility to choose the best approach for their needs.
Perl has a reputation for being highly expressive and concise, allowing developers to write powerful code with fewer lines. It supports both dynamic and static typing, offering a degree of flexibility in variable usage.
Perl has a large and active community, with numerous online resources, forums, and tutorials available. The community has contributed extensively to the language's development, ensuring the availability of a robust ecosystem and timely bug fixes.
In recent years, Perl has witnessed a decline in popularity compared to newer scripting languages such as Python and Ruby. Nonetheless, it remains a valuable tool in the hands of experienced developers, especially for tasks involving text processing, data extraction, and system administration.
Overall, Perl is a versatile command line tool that excels in manipulating text, automating system tasks, and solving complex problems efficiently. Its wealth of built-in features and extensive library make it a powerful choice for both beginners and experienced developers.
List of commands for perl:
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nikto:tldr:25796 nikto: Perform a basic Nikto scan against a target host.$ perl nikto.pl -h ${192-168-0-1}try on your machineexplain this command
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nikto:tldr:b0049 nikto: Update to the latest plugins and databases.$ perl nikto.pl -updatetry on your machineexplain this command
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nikto:tldr:e8ae1 nikto: Specify the port number when performing a basic scan.$ perl nikto.pl -h ${192-168-0-1} -p ${443}try on your machineexplain this command
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perl:tldr:02d62 perl: Parse and execute a Perl statement.$ perl -e ${perl_statement}try on your machineexplain this command
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perl:tldr:5d647 perl: Edit all file lines [i]n-place with a specific replacement [e]xpression, saving a backup with a new extension.$ perl -p -i'.${extension}' -e 's/${regular_expression}/${replacement}/g' ${filename}try on your machineexplain this command
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perl:tldr:8c041 perl: Check syntax errors on a Perl script.$ perl -c ${script-pl}try on your machineexplain this command
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perl:tldr:a0c25 perl: Parse and execute a Perl script.$ perl ${script-pl}try on your machineexplain this command
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perl:tldr:dc70e perl: Run a multi-line replacement [e]xpression on a file, and save the result in a specific file.$ perl -p -e 's/${foo\nbar}/${foobar}/g' ${path-to-input_file} > ${path-to-output_file}try on your machineexplain this command
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perl:tldr:e0604 perl: Run a Perl script in debug mode, using `perldebug`.$ perl -d ${script-pl}try on your machineexplain this command