In the Rails source tree:<p><pre><code>    find . -name "*.rb" | xargs wc -l | tail -1
    161472 total
</code></pre>
In the Ruby source tree:<p><pre><code>     find . -name "*.rb" | xargs wc -l | tail -1
     639682 total
     find . -name "*.c" | xargs wc -l | tail -1
     590656 total</code></pre>