# Upgrade/Install ruby 2.1.2
`ubuntu` `12.04` `14.04`

Reference http://stackoverflow.com/a/18490935/2037928

Login as root

Install needed packages
```bash
apt-get -y install build-essential zlib1g-dev libssl-dev libreadline6-dev libyaml-dev
```

```
cd /tmp
```

Download appropriate ruby version https://www.ruby-lang.org/en/downloads/
```
wget http://cache.ruby-lang.org/pub/ruby/2.1/ruby-2.1.2.tar.gz
```

Unpack
```
tar -xvzf ruby-2.1.2.tar.gz
cd ruby-2.1.2/
```

Compile from source
```
./configure --prefix=/usr/local
make
make install
```

Make sure deploy user has access to installing gems
```
chown -R deploy:staff /usr/local/bin
chown -R deploy:staff /usr/local/lib/ruby
```

Login as deploy user

Install bundler
```
gem install bundler
```

Locally
```
cap production deploy
```

Remove the old manifest.yml file
```
rm /u/apps/YOUR_APP_NAME/shared/assets/manifest.yml
```

I also had to make the unicorn binary into a binstub