How To Install ri on Ubuntu 20.04
Introduction
In this tutorial we learn how to install ri
on Ubuntu 20.04.
What is ri
ri is:
ri is a command line tool that displays descriptions of built-in Ruby methods, classes, and modules. For methods, it shows you the calling sequence and a description. For classes and modules, it shows a synopsis along with a list of the methods the class or module implements.
This package provides ri command and descriptions about Ruby. This package provides the ri documentation for the Ruby standard library. The ri executable itself is in the ruby package.
This package is a dependency package, which depends on Debian’s default Ruby version (currently v2.7).
There are three methods to install ri
on Ubuntu 20.04. We can use apt-get
, apt
and aptitude
. In the following sections we will describe each method. You can choose one of them.
Install ri Using apt-get
Update apt database with apt-get
using the following command.
sudo apt-get update
After updating apt database, We can install ri
using apt-get
by running the following command:
sudo apt-get -y install ri
Install ri Using apt
Update apt database with apt
using the following command.
sudo apt update
After updating apt database, We can install ri
using apt
by running the following command:
sudo apt -y install ri
Install ri 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 ri
using aptitude
by running the following command:
sudo aptitude -y install ri
How To Uninstall ri on Ubuntu 20.04
To uninstall only the ri
package we can use the following command:
sudo apt-get remove ri
Uninstall ri And Its Dependencies
To uninstall ri
and its dependencies that are no longer needed by Ubuntu 20.04, we can use the command below:
sudo apt-get -y autoremove ri
Remove ri Configurations and Data
To remove ri
configuration and data from Ubuntu 20.04 we can use the following command:
sudo apt-get -y purge ri
Remove ri configuration, data, and all of its dependencies
We can use the following command to remove ri
configurations, data and all of its dependencies, we can use the following command:
sudo apt-get -y autoremove --purge ri
References
Summary
In this tutorial we learn how to install ri
package on Ubuntu 20.04 using different package management tools: apt
, apt-get
and aptitude
.