My rails -v differs from my gem list rails -

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i'm working on ubuntu, , i'm not adept in windows, , i'm trying install rails. tried 1 installation , got rails 2.3.14, when wanted 4.0.0. found think correct installation via sudo gem install rails, , got 4.0.0. however, can't seem use rails 4.0.0 version. when i'm in terminal , run rails -v command, rails 2.3.14.

however, in 'gem list', see rails 4.0.0, not rails 2.3.14... i'm not sure rails 2.3.14 is... how rid of and/or ruby use rails 4.0.0?

sounds me installing ubuntu ruby/rails etc. in order have multiple ruby , rails different gem versions, should use rvm. can switch , forth between different versions of on project base. find ubuntu packages being little behind of rails community used to.


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