user23040: While setting up a private nomp mining pool as a learning project, The instructions recommended setting up block notify. What are block notifications? 

user18196: The -blocknotify="{cmd}" is one of the configurable settings when starting the bitcoin daemon. For example, I can start my bitcoind with this command:
bitcoind -blocknotify='echo %s'

And when a new block is solved, the block hash gets printed.
00000000000000000e979c4a51dc6cb9606e47a2b499f591645f53fe801ae374


23040: <p>While setting up a private nomp mining pool as a learning project, The instructions recommended setting up block notify. What are block notifications? </p>
 18196: <p>The <code>-blocknotify="{cmd}"</code> is one of the <a href="https://en.bitcoin.it/wiki/Running_Bitcoin" rel="nofollow">configurable settings</a> when starting the bitcoin daemon. For example, I can start my bitcoind with this command:</p>

<pre><code>bitcoind -blocknotify='echo %s'
</code></pre>

<p>And when a new block is solved, the block hash gets printed.</p>

<pre><code>00000000000000000e979c4a51dc6cb9606e47a2b499f591645f53fe801ae374
</code></pre>
