How To Install libotr5 on Ubuntu

Posted on April 1, 2023  (Last modified on May 20, 2023 )

3 minutes  • 428 words

Introduction

In this tutorial we learn how to install libotr5 on Ubuntu.

What is libotr5

libotr5 is:

OTR allows you to have private conversations over IM by providing:

• Encryption
  • No one else can read your instant messages.
• Authentication
  • You are assured the correspondent is who you think it is.
• Deniability
  • The messages you send do not have digital signatures that are checkable by a third party. Anyone can forge messages after a conversation to make them look like they came from you. However, during a conversation, your correspondent is assured the messages they see are authentic and unmodified.
• Perfect forward secrecy
  • If you lose control of your private keys, no previous conversation is compromised.

This package provides the OTR library.

There are three methods to install libotr5 on Ubuntu. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.

Install libotr5 Using apt-get

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

sudo apt-get update

After updating apt database, We can install libotr5 using apt-get by running the following command:

sudo apt-get -y install libotr5

Install libotr5 Using apt

Update apt database with apt using the following command.

sudo apt update

After updating apt database, We can install libotr5 using apt by running the following command:

sudo apt -y install libotr5

Install libotr5 Using aptitude

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

sudo aptitude update

After updating apt database, We can install libotr5 using aptitude by running the following command:

sudo aptitude -y install libotr5

How To Uninstall libotr5 on Ubuntu

To uninstall only the libotr5 package we can use the following command:

sudo apt-get remove libotr5

Uninstall libotr5 And Its Dependencies

To uninstall libotr5 and its dependencies that are no longer needed by Ubuntu, we can use the command below:

sudo apt-get -y autoremove libotr5

Remove libotr5 Configurations and Data

To remove libotr5 configuration and data from Ubuntu we can use the following command:

sudo apt-get -y purge libotr5

Remove libotr5 configuration, data, and all of its dependencies

We can use the following command to remove libotr5 configurations, data and all of its dependencies, we can use the following command:

sudo apt-get -y autoremove --purge libotr5

Dependencies

libotr5 have the following dependencies:

• libc6
• libgcrypt20

References

• libotr5 website

Summary

In this tutorial we learn how to install libotr5 package on Ubuntu using different package management tools: apt, apt-get and aptitude.