ruby installation with rvm

Question

➜  TestApps git:(master) ✗ rvm install 2.1.3
Warning, new version of rvm available '1.25.31', you are using older version '1.25.28'.
You can disable this warning with:    echo rvm_autoupdate_flag=0 >> ~/.rvmrc
You can enable  auto-update  with:    echo rvm_autoupdate_flag=2 >> ~/.rvmrc
Unknown ruby string (do not know how to handle): ruby-2.1.3.
Unknown ruby string (do not know how to handle): ruby-2.1.3.
Searching for binary rubies, this might take some time.
No binary rubies available for: ubuntu/12.04/i386/ruby-2.1.3.
Continuing with compilation. Please read 'rvm help mount' to get more information on binary rubies.
Checking requirements for ubuntu.
Requirements installation successful.
Unknown ruby string (do not know how to handle): ruby-2.1.3.
Installing Ruby from source to: /home/test-user/.rvm/rubies/ruby-2.1.3, this may take a while depending on your cpu(s)...
Unknown ruby string (do not know how to handle): ruby-2.1.3.
ruby-2.1.3 - #downloading ruby-2.1.3, this may take a while depending on your connection...
  % Total     % Received %   Xferd  Average Speed   Time    Time      Time  Current
                                                         Dload    Upload     Total   Spent    Left  Speed
100   11.4M    100 11.4M      0      0    63269       0  0:03:09  0:03:09 --:--:-- 43967
No checksum for downloaded archive, recording checksum in user configuration.
ruby-2.1.3 - #extracting ruby-2.1.3 to /home/test-user/.rvm/src/ruby-2.1.3 - please wait
ruby-2.1.3 - #configuring - please wait
ruby-2.1.3 - #post-configuration - please wait
ruby-2.1.3 - #compiling - please wait

Why rvm installation showing these below lines:
Warning, new version of rvm available '1.25.31', you are using older version '1.25.28'.
You can disable this warning with: echo rvm_autoupdate_flag=0 >> ~/.rvmrc
You can enable auto-update with: echo rvm_autoupdate_flag=2 >> ~/.rvmrc
Unknown ruby string (do not know how to handle): ruby-2.1.3.
Unknown ruby string (do not know how to handle): ruby-2.1.3.

Am I missing anything?

Answer 1

It's an advice that there is a newer version of RVM available. You can upgrade with

$ rvm get latest