https://diegocarrasco.com/enContents © 2026 <a href="mailto:hi@diegocarrasco.com">Diego Carrasco G.</a> Sat, 11 Apr 2026 08:03:45 GMTNikola (getnikola.com)http://blogs.law.harvard.edu/tech/rsshttps://diegocarrasco.com/fixed-when-using-jupyter-on-wsl2-on-windows-11-i-get-kernel-wont-start-and-throws-permissions-assignment-failed-for-secure-file-error/Diego Carrasco G.<section id="error"> <h2>Error</h2> <div class="code"><pre class="code bash"><a id="rest_code_3ae4bcc6f3fb4584b4cf1c74c5ec2455-1" name="rest_code_3ae4bcc6f3fb4584b4cf1c74c5ec2455-1" href="https://diegocarrasco.com/fixed-when-using-jupyter-on-wsl2-on-windows-11-i-get-kernel-wont-start-and-throws-permissions-assignment-failed-for-secure-file-error/#rest_code_3ae4bcc6f3fb4584b4cf1c74c5ec2455-1"></a>Kernel<span class="w"> </span>won<span class="err">'</span>t<span class="w"> </span>start,<span class="w"> </span>throws<span class="w"> </span><span class="s2">"Permissions assignment failed for secure file"</span><span class="w"> </span>error </pre></div> </section> <section id="error-in-wsl2-on-windows-11"> <h2>Error in WSL2 on Windows 11</h2> <div class="code"><pre class="code bash"><a id="rest_code_1253223d67a94ecd99ad45b34f3bf487-1" name="rest_code_1253223d67a94ecd99ad45b34f3bf487-1" href="https://diegocarrasco.com/fixed-when-using-jupyter-on-wsl2-on-windows-11-i-get-kernel-wont-start-and-throws-permissions-assignment-failed-for-secure-file-error/#rest_code_1253223d67a94ecd99ad45b34f3bf487-1"></a>RuntimeError:<span class="w"> </span>Permissions<span class="w"> </span>assignment<span class="w"> </span>failed<span class="w"> </span><span class="k">for</span><span class="w"> </span>secure<span class="w"> </span>file:<span class="w"> </span><span class="s1">'/home/d-carrasco/.local/share/jupyter/runtime/jpserver-12836.json'</span>.<span class="w"> </span>Got<span class="w"> </span><span class="s1">'0o677'</span><span class="w"> </span>instead<span class="w"> </span>of<span class="w"> </span><span class="s1">'0o0600'</span>. </pre></div> </section> <section id="how-to-fix"> <h2>How to fix</h2> <ol class="arabic simple"> <li><p>Terminate your Notebook server.</p></li> <li><p>Run <code>export JUPYTER_RUNTIME_DIR=/tmp</code> on your WSL2 terminal.</p></li> <li><p>Start Notebook server as you normally do. (Note that this assumes you're not already setting the runtime directory in some other fashion).</p></li> </ol> <p>(source: <a class="reference external" href="https://github.com/jupyter/notebook/issues/5058#issuecomment-554687632">https://github.com/jupyter/notebook/issues/5058#issuecomment-554687632</a>)</p> </section> <section id="reference"> <h2>Reference</h2> <ul class="simple"> <li><p><a class="reference external" href="https://github.com/jupyter/notebook/issues/5058">https://github.com/jupyter/notebook/issues/5058</a></p></li> </ul> </section>command-linedevhowtopythonquick-guidesWindows 11WSL2https://diegocarrasco.com/fixed-when-using-jupyter-on-wsl2-on-windows-11-i-get-kernel-wont-start-and-throws-permissions-assignment-failed-for-secure-file-error/Thu, 10 Nov 2022 13:00:00 GMT