If you install the “sqlite3-ruby” gem and it prints something like this:
Building native extensions. This could take a while... Successfully installed sqlite3-ruby-1.2.2 1 gem installed Installing ri documentation for sqlite3-ruby-1.2.2... Installing RDoc documentation for sqlite3-ruby-1.2.2...
And when you try to use it in your rails application you get an error like this:
rake aborted! no such file to load -- sqlite3/database (See full trace by running task with --trace)
You’re probably missing the libsqlite3-ruby package.
sudo apt-get install libsqlite3-ruby