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after i installed ruby from the ruby 1.9.2 package i got :: r@ubuntu:/$ ruby -v ruby 1.8.7 (2010-01-10 patchlevel 249) [i486-linux]
HOW COME ??
i need 1.9.2 … how do i get it ??
You have another version of ruby installed on the system. The way that *nix determines what command you are trying to run when you execute a command without specifying the directory is using the $PATH environment variable. You can see which version of ruby your system is loading by running
which ruby. If, for example, you got/bin/rubyand you installed ruby 1.9.2 to/usr/local/bin/ruby, you probably have/binin your $PATH before you have/usr/local/bin/.To resolve the problem, you can run
export PATH=/usr/local/bin/:$PATHand test it. Once you determine that this resolves your problem, you should add that command to your ~/.bashrc file so you don’t need to manually type it every time. After you save the ~/.bashrc file, you will need to reload it by either opening a new prompt, or runningsource ~/.bashrc.