error in uninstalling Ruby from UBUNTU 14.0.4 LTS

Question

I have made some mistake in installing Ruby and and now I'm trying to uninstall it (How to remove ruby from ubuntu) but it's giving the following error. I tried with sudo apt-get purge ruby but still couldn't uninstall. It shows ruby is not installed but I did check and confirm that it is installed in the location /usr/local/bin/ruby. please help me to uninstall Ruby and RVM from my machine.

$ ruby -v
ruby 1.8.7 (2013-06-27 patchlevel 374) [x86_64-linux]

$ sudo apt-get purge ruby 1.8.7
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Note, selecting 'libhdf5-mpich2-1.8.7' for regex '1.8.7'
Note, selecting 'libhdf5-1.8.7' for regex '1.8.7'
Note, selecting 'libghc-utility-ht-prof-0.0.5.1-87764' for regex '1.8.7'
Note, selecting 'libhdf5-openmpi-1.8.7' for regex '1.8.7'
Note, selecting 'libhdf5-serial-1.8.7' for regex '1.8.7'
Note, selecting 'libghc-utility-ht-dev-0.0.5.1-87764' for regex '1.8.7'
Note, selecting 'libghc-utility-ht-dev' instead of 'libghc-utility-ht-dev-0.0.5.1-87764'
Note, selecting 'libghc-utility-ht-prof' instead of 'libghc-utility-ht-prof-0.0.5.1-87764'
Package 'libhdf5-1.8.7' is not installed, so not removed
Package 'libhdf5-serial-1.8.7' is not installed, so not removed
Package 'libhdf5-mpich2-1.8.7' is not installed, so not removed
Package 'libhdf5-openmpi-1.8.7' is not installed, so not removed
Package 'ruby' is not installed, so not removed
0 upgraded, 0 newly installed, 0 to remove and 567 not upgraded.

Answer 1

I have removed the ruby directory from home directory and followed the below steps...

$ whereis ruby
ruby: /usr/local/bin/ruby /usr/local/lib/ruby

$ ruby -v
ruby 1.8.7 (2013-06-27 patchlevel 374) [x86_64-linux]

$ sudo rm -rf /usr/local/bin/ruby
$ sudo rm -rf /usr/local/lib/ruby
$ ruby -v
bash: /usr/local/bin/ruby: No such file or directory

finally it got uninstalled !! Thanks to Rick

Answer 2

if you want to remove ruby completely,

sudo apt-get purge ruby rubygems

Or you can follow this steps below,

Use this to find out what it is

$ readlink -f /usr/local/bin/ruby

/usr/local/bin/ruby1.8.7

Use this to find out what package is using:

$ dpkg -S /usr/local/bin/ruby1.8.7
ruby1.8: /usr/local/bin/ruby1.8.7

And use this to install,

$ apt-get purge ruby1.8.7

Answer 3

If you are using rvm, then you can uninstall ruby 1.8.7 using the command

rvm unistall 1.8.7

and then you uninstall the rvm using the command

rvm implode