-h2. Essential Configuration
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-@SystemRootToken@ is used by Arvados system services to authenticate as the system (root) user when communicating with the API server.
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-@ManagementToken@ is used to authenticate access to system metrics.
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-@API.RailsSessionSecretToken@ is required by the API server.
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-@Collections.BlobSigningKey@ is used to construct blob signatures, as part of storage layer access control.
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-You can generate a random token for each of these items at the command line like this:
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-<notextile>
-<pre><code>~$ <span class="userinput">tr -dc 0-9a-zA-Z </dev/urandom | head -c40; echo</span>
-</code></pre>
-</notextile>
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-Sample configuration file fragment. Fill in each configuration item with the tokens you generate.