How to remove Ruby from Ubuntu

Question

I want to remove Ruby, so I try this. How can I remove this?

sudo apt-get autoremove ruby
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package 'ruby' is not installed, so not removed
0 upgraded, 0 newly installed, 0 to remove and 534 not upgraded.

here@jaskaran:/$ whereis ruby
    ruby: /usr/bin/ruby /usr/lib/ruby /usr/bin/X11/ruby /usr/share/man/man1/ruby.1.gz
here@jaskaran:/$ ruby -v
ruby 1.9.3p194 (2012-04-20 revision 35410) [i686-linux]

Answer 1

Ubuntu...?

Use this to find out what executable you're running:

$ which ruby
/usr/bin/ruby

Use this to find out what it actually is:

$ readlink -f /usr/bin/ruby
/usr/bin/ruby1.8

Use this to find out what package it belongs to:

$ dpkg -S /usr/bin/ruby1.8
ruby1.8: /usr/bin/ruby1.8

Use this to uninstall that:

$ apt-get purge ruby1.8

Note: If you have installed Ruby using Version/Environment managers like RVM or Rbenv then this method is not gonna work because Rubies will be installed as scripts not packages.