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 <p><strong><code>lock [-pc] &lt;url&gt;</code></strong></p>
 <p>Creates a lock on the resource specified by the <em>url</em>. The lock is an exclusive write lock with infinite depth.</p>
 <p>If the resource is successfully locked, a lock token for this resource is printed to stdout. This lock token should be saved somewhere to unlock the resource eventually.</p>