How to uninstall/delete older ruby version and keep newer. I have two version of ruby installed

Question

I had ruby 2.2.3p173 (2015-08-18 revision 51636) [x86_64-linux] I had to upgrade it to ruby 2.3.1 through RVM because i wanted to upgrade rails. After upgrading ruby to (2.3.1) and then rails to (4.2.6) when i close terminal and re-open, it again use ruby 2.2.3p173 which is older version. and every time I have to run below command s to make it work on ruby 2.3.1

$ source ~/.rvm/scripts/rvm

$ type rvm | head -n 1

$ rvm --default use 2.3.1

Is there any way I do not have to run this process every time and by default I can use new version of ruby 2.3.1 ?

Answer 1

Your question is a little misleading. You have a system installation of ruby and installed rvm and another ruby version with that - and now you want to have sourced rvm per default.

To not need to do source ~/.rvm/scripts/rvm anymore, you just put that into your ~/.bash_profile (where it maybe already was put automatically) and ensure your terminal is a login shell.

For Gnome Terminal you click "Profile Preferences", and choose "Run command as login shell" in Tab "Title and Command".

If I did not figure correct shell configuration, follow instructions here: https://rvm.io/rvm/basics

Sorry information there are to many and system specific, to copy all here.

Answer 2

Firstly sudo apt-get purge ruby
And if you want to use a select version of ruby then try rvm use ruby 'version' .It will select the version you want to use for ruby