Rails%203%20In%20Action

390 CHAPTER 14 Deployment
rvm group, which is a group created by the installation of RVM. To add your current
user to this group, run this command:
sudo usermod -a -G rvm user
The -a option here tells the command to append some groups to the list of groups
that the user is in, and the -G option (like you saw before with useradd) specifies the
group. You specify your username on the end of this command, telling it who you
want this new group applied to.
To make the rvm command effective for all users, add a line to /etc/profile. Whenever
new terminal sessions are launched, this file is read and run. Put a line in it using
these commands:
sudo su
echo 'source "/usr/local/rvm/scripts/rvm"' >> /etc/profile
exit
The source command here will load the/usr/local/rvm/scripts/rvm file for each user
whenever they start a new session. To make this change effective for the current session,
exit out of your terminal and log back in. Once back in, you should be able to
run rvm and have it output the help information.
If that’s the case, then you are now ready to install Ruby.
14.2.2 Installing Ruby
Ruby 1.9.2 is considered the latest stable version of Ruby (at least, as of this writing).
By installing it, you’re on your way to being able to run your Rails application on this
server. To install this version of Ruby, run this command:
rvm install 1.9.2
This command will take some time to run as it needs to download, compile, and then
install Ruby. To switch to using this Ruby, use this command:
rvm use 1.9.2
When you type ruby -v into the terminal, you should see something like this:
ruby 1.9.2p180 (2011-02-18 revision 30909) [i686-linux]
The value may be different, but as long as it begins with ruby 1.9.2, you know that
you’ve got the right Ruby version installed. To make this the default version of Ruby
for your user, run the rvm use command again, but pass in an option:
rvm use --default 1.9.2
Now every time that you log in to this server you’ll be using this version of Ruby. While
you’re doing Ruby things, let’s install the Bundler gem, which you’ll need for your
application to install its gems on the server and rake for running Rake tasks:
gem install bundler rake