# Sh: irb: command not found error **URL:** \ **Category:** Rails\ **Created:** [May 1, 2010, 1:04pm UTC](https://www.ruby-forum.com/t/sh-irb-command-not-found-error/187904 "2010-05-01T13:04:54Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![toulon](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/4af34b/32.png) [@toulon](https://www.ruby-forum.com/u/toulon)\ **Post date:** [May 1, 2010, 1:04pm UTC](https://www.ruby-forum.com/t/sh-irb-command-not-found-error/187904/1 "2010-05-01T13:04:54Z")
I am running ruby 1.8.6 and rails 2.3.5 and just started learning rails When following the tutorial on > **[Getting Started with Rails — Ruby on Rails Guides](https://guides.rubyonrails.org/getting_started.html)** > > Getting Started with RailsThis guide covers getting up and running with Ruby on Rails.After reading this guide, you will know: How to install Rails, create a new Rails application, and connect your application to a database. The general layout of a... I tried to run the command script/console and it failed. After some research I found the following solution. I am posting this as my google search did not turn up any useful on my initial scan Anyway here goes for what it is worth $ script/console Loading development environment (Rails 2.3.5) sh: irb: command not found How to recompile ruby with readline support - this solves the irb issue above 1. Install readline to /usr/local 2. Recompile ruby from scratch and use the --with-readline-dir=/usr/ local switch or if you have downloaded the ruby sources earlier and built it by hand, 1. Go to the ext/readline folder of your ruby source tree 2. Type ruby extconf.rb and then run the make && make install procedure for ruby. See example below mfnit1 blog $ cd /usr/src/ruby-1.8.6/ext/readline/ mfnit1 readline $ ls depend extconf.rb Makefile mkmf.log readline.c readline.o README README.ja mfnit1 readline $ ruby extconf.rb checking for tgetnum() in -lncurses… yes checking for readline/readline.h… yes checking for readline/history.h… yes checking for readline() in -lreadline… yes checking for rl\_filename\_completion\_function in stdio.h,readline/ readline.h,readline/history.h… yes checking for rl\_username\_completion\_function in stdio.h,readline/ readline.h,readline/history.h… yes checking for rl\_completion\_matches in stdio.h,readline/ readline.h,readline/history.h… yes checking for rl\_deprep\_term\_function in stdio.h,readline/ readline.h,readline/history.h… yes checking for rl\_completion\_append\_character in stdio.h,readline/ readline.h,readline/history.h… yes checking for rl\_basic\_word\_break\_characters in stdio.h,readline/ readline.h,readline/history.h… yes checking for rl\_completer\_word\_break\_characters in stdio.h,readline/ readline.h,readline/history.h… yes checking for rl\_basic\_quote\_characters in stdio.h,readline/ readline.h,readline/history.h… yes checking for rl\_completer\_quote\_characters in stdio.h,readline/ readline.h,readline/history.h… yes checking for rl\_filename\_quote\_characters in stdio.h,readline/ readline.h,readline/history.h… yes checking for rl\_attempted\_completion\_over in stdio.h,readline/ readline.h,readline/history.h… yes checking for rl\_library\_version in stdio.h,readline/ readline.h,readline/history.h… yes checking for rl\_event\_hook in stdio.h,readline/readline.h,readline/ history.h… yes checking for rl\_cleanup\_after\_signal()… yes checking for rl\_clear\_signals()… yes checking for rl\_vi\_editing\_mode()… yes checking for rl\_emacs\_editing\_mode()… yes checking for rl\_clear\_signals()… yes checking for replace\_history\_entry()… yes checking for remove\_history()… yes creating Makefile $ cd /usr/src/ruby-1.8.6 $ make $ make install Test of script/console mfnit1 ruby-1.8.6 $ cd /var/www/html/blog/ mfnit1 blog $ script/console Loading development environment (Rails 2.3.5)