Question

I installed the ruby-processing gem using:

$ sudo gem install ruby-processing

When I try to run ruby-processing‘s rp5 command, this is the output I get:

rp5 run twitter_emotion_graphs.rb 
No command 'rp5' found, did you mean:
Command 'rpm' from package 'rpm' (main)
Command 'rpl' from package 'rpl' (universe)
rp5: command not found

Here’s the context for more information (have a look at the README) :
https://github.com/vishrut/Twitter-Emotion-Graphs

Answer 1

On some systems (e.g., Debian) the path where the gem executables are installed to are not in the $PATH. Dependingmon your distribution, that path is on a different location, on Debian with the system Ruby, it is at /var/lib/gems/1.8/bin. To add that to the system’s $PATH, put something like this into a new file in /etc/profile.d/rubygems.sh

export PATH="$PATH:/var/lib/gems/1.8/bin"