How To Install ruby-irb on CentOS 8
Introduction
In this tutorial we learn how to install ruby-irb on CentOS 8.
What is ruby-irb
The irb is acronym for Interactive Ruby. It evaluates ruby expression from the terminal.
We can use yum or dnf to install ruby-irb on CentOS 8. In this tutorial we discuss both methods but you only need to choose one of method to install ruby-irb.
Install ruby-irb on CentOS 8 Using dnf
Update yum database with dnf using the following command.
sudo dnf makecache --refresh
The output should look something like this:
CentOS Linux 8 - AppStream 43 kB/s | 4.3 kB 00:00
CentOS Linux 8 - BaseOS 65 kB/s | 3.9 kB 00:00
CentOS Linux 8 - ContinuousRelease 43 kB/s | 3.0 kB 00:00
CentOS Linux 8 - Extras 23 kB/s | 1.5 kB 00:00
CentOS Linux 8 - FastTrack 40 kB/s | 3.0 kB 00:00
CentOS Linux 8 - HighAvailability 36 kB/s | 3.9 kB 00:00
CentOS Linux 8 - Plus 24 kB/s | 1.5 kB 00:00
CentOS Linux 8 - PowerTools 50 kB/s | 4.3 kB 00:00
Extra Packages for Enterprise Linux Modular 8 - x86_64 13 kB/s | 9.2 kB 00:00
Extra Packages for Enterprise Linux 8 - x86_64 24 kB/s | 8.5 kB 00:00
Metadata cache created.
After updating yum database, We can install ruby-irb using dnf by running the following command:
sudo dnf -y install ruby-irb
Install ruby-irb on CentOS 8 Using yum
Update yum database with yum using the following command.
sudo yum makecache --refresh
The output should look something like this:
CentOS Linux 8 - AppStream 43 kB/s | 4.3 kB 00:00
CentOS Linux 8 - BaseOS 65 kB/s | 3.9 kB 00:00
CentOS Linux 8 - ContinuousRelease 43 kB/s | 3.0 kB 00:00
CentOS Linux 8 - Extras 23 kB/s | 1.5 kB 00:00
CentOS Linux 8 - FastTrack 40 kB/s | 3.0 kB 00:00
CentOS Linux 8 - HighAvailability 36 kB/s | 3.9 kB 00:00
CentOS Linux 8 - Plus 24 kB/s | 1.5 kB 00:00
CentOS Linux 8 - PowerTools 50 kB/s | 4.3 kB 00:00
Extra Packages for Enterprise Linux Modular 8 - x86_64 13 kB/s | 9.2 kB 00:00
Extra Packages for Enterprise Linux 8 - x86_64 24 kB/s | 8.5 kB 00:00
Metadata cache created.
After updating yum database, We can install ruby-irb using yum by running the following command:
sudo yum -y install ruby-irb
How To Uninstall ruby-irb on CentOS 8
To uninstall only the ruby-irb package we can use the following command:
sudo dnf remove ruby-irb
ruby-irb Package Contents on CentOS 8
/usr/bin/irb
/usr/share/man/man1/irb.1.gz
/usr/share/ruby/irb
/usr/share/ruby/irb.rb
/usr/share/ruby/irb/cmd
/usr/share/ruby/irb/cmd/chws.rb
/usr/share/ruby/irb/cmd/fork.rb
/usr/share/ruby/irb/cmd/help.rb
/usr/share/ruby/irb/cmd/load.rb
/usr/share/ruby/irb/cmd/nop.rb
/usr/share/ruby/irb/cmd/pushws.rb
/usr/share/ruby/irb/cmd/subirb.rb
/usr/share/ruby/irb/completion.rb
/usr/share/ruby/irb/context.rb
/usr/share/ruby/irb/ext
/usr/share/ruby/irb/ext/change-ws.rb
/usr/share/ruby/irb/ext/history.rb
/usr/share/ruby/irb/ext/loader.rb
/usr/share/ruby/irb/ext/multi-irb.rb
/usr/share/ruby/irb/ext/save-history.rb
/usr/share/ruby/irb/ext/tracer.rb
/usr/share/ruby/irb/ext/use-loader.rb
/usr/share/ruby/irb/ext/workspaces.rb
/usr/share/ruby/irb/extend-command.rb
/usr/share/ruby/irb/frame.rb
/usr/share/ruby/irb/help.rb
/usr/share/ruby/irb/init.rb
/usr/share/ruby/irb/input-method.rb
/usr/share/ruby/irb/inspector.rb
/usr/share/ruby/irb/lc
/usr/share/ruby/irb/lc/error.rb
/usr/share/ruby/irb/lc/help-message
/usr/share/ruby/irb/lc/ja
/usr/share/ruby/irb/lc/ja/encoding_aliases.rb
/usr/share/ruby/irb/lc/ja/error.rb
/usr/share/ruby/irb/lc/ja/help-message
/usr/share/ruby/irb/locale.rb
/usr/share/ruby/irb/magic-file.rb
/usr/share/ruby/irb/notifier.rb
/usr/share/ruby/irb/output-method.rb
/usr/share/ruby/irb/ruby-lex.rb
/usr/share/ruby/irb/ruby-token.rb
/usr/share/ruby/irb/slex.rb
/usr/share/ruby/irb/src_encoding.rb
/usr/share/ruby/irb/version.rb
/usr/share/ruby/irb/workspace.rb
/usr/share/ruby/irb/ws-for-case-2.rb
/usr/share/ruby/irb/xmp.rb
References
Summary
In this tutorial we learn how to install ruby-irb on CentOS 8 using yum and dnf.