I get this error
`establish_connection\': Please install the mysql2 adapter: `gem install activerecord-mysql2-adapter` (no such file to load -- active_record
I'm a beginner at ruby, rails, and linux. So if this solution did not work, I hold no responsibility :)
Step 1:
sudo gem uninstall mysql2
Step 2:
sudo gem install mysql -v 0.2.7
Start webrick, if the same problem still appears reinstall rails.
This solution works for me.