How To Install libre2-9 on Kali Linux

Introduction

In this tutorial we learn how to install libre2-9 on Kali Linux.

What is libre2-9

libre2-9 is:

RE2 is a fast, safe, thread-friendly alternative to backtracking regular expression engines like those used in PCRE, Perl, and Python. It is a C++ library.

RE2 uses automata theory to guarantee that regular expression searches run in time linear in the size of the input. RE2 implements memory limits, so that searches can be constrained to a fixed amount of memory. RE2 is engineered to use a small fixed C++ stack footprint no matter what inputs or regular expressions it must process; thus RE2 is useful in multithreaded environments where thread stacks cannot grow arbitrarily large.

On large inputs, RE2 is often much faster than backtracking engines; its use of automata theory lets it apply optimizations that the others cannot.

There are three methods to install libre2-9 on Kali Linux. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.

Install libre2-9 Using apt-get

Update apt database with apt-get using the following command.

sudo apt-get update

After updating apt database, We can install libre2-9 using apt-get by running the following command:

sudo apt-get -y install libre2-9

Install libre2-9 Using apt

Update apt database with apt using the following command.

sudo apt update

After updating apt database, We can install libre2-9 using apt by running the following command:

sudo apt -y install libre2-9

Install libre2-9 Using aptitude

If you want to follow this method, you might need to install aptitude on Kali Linux first since aptitude is usually not installed by default on Kali Linux. Update apt database with aptitude using the following command.

sudo aptitude update

After updating apt database, We can install libre2-9 using aptitude by running the following command:

sudo aptitude -y install libre2-9

How To Uninstall libre2-9 on Kali Linux

To uninstall only the libre2-9 package we can use the following command:

sudo apt-get remove libre2-9

Uninstall libre2-9 And Its Dependencies

To uninstall libre2-9 and its dependencies that are no longer needed by Kali Linux, we can use the command below:

sudo apt-get -y autoremove libre2-9

Remove libre2-9 Configurations and Data

To remove libre2-9 configuration and data from Kali Linux we can use the following command:

sudo apt-get -y purge libre2-9

Remove libre2-9 configuration, data, and all of its dependencies

We can use the following command to remove libre2-9 configurations, data and all of its dependencies, we can use the following command:

sudo apt-get -y autoremove --purge libre2-9

Dependencies

libre2-9 have the following dependencies:

• libc6
• libgcc-s1
• libstdc++6

References

• libre2-9 website

Summary

In this tutorial we learn how to install libre2-9 package on Kali Linux using different package management tools: apt, apt-get and aptitude.