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107 lines
7.8 KiB
HTML
<!doctype html>
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<html>
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<title>npm-doctor</title>
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<meta charset="utf-8">
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<link rel="stylesheet" type="text/css" href="../../static/style.css">
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<link rel="canonical" href="https://www.npmjs.org/doc/cli/npm-doctor.html">
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<script async=true src="../../static/toc.js"></script>
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<body>
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<div id="wrapper">
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<h1><a href="../cli/npm-doctor.html">npm-doctor</a></h1> <p>Check your environments</p>
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<h2 id="synopsis">SYNOPSIS</h2>
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<pre><code>npm doctor</code></pre><h2 id="description">DESCRIPTION</h2>
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<p><code>npm doctor</code> runs a set of checks to ensure that your npm installation has
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what it needs to manage your JavaScript packages. npm is mostly a standalone tool, but it does
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have some basic requirements that must be met:</p>
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<ul>
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<li>Node.js and git must be executable by npm.</li>
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<li>The primary npm registry, <code>registry.npmjs.com</code>, or another service that uses
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the registry API, is available.</li>
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<li>The directories that npm uses, <code>node_modules</code> (both locally and globally),
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exist and can be written by the current user.</li>
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<li>The npm cache exists, and the package tarballs within it aren't corrupt.</li>
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</ul>
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<p>Without all of these working properly, npm may not work properly. Many issues
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are often attributable to things that are outside npm's code base, so <code>npm
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doctor</code> confirms that the npm installation is in a good state.</p>
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<p>Also, in addition to this, there are also very many issue reports due to using
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old versions of npm. Since npm is constantly improving, running <code>npm@latest</code> is
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better than an old version.</p>
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<p><code>npm doctor</code> verifies the following items in your environment, and if there are
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any recommended changes, it will display them.</p>
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<h3 id="npm-ping"><code>npm ping</code></h3>
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<p>By default, npm installs from the primary npm registry, <code>registry.npmjs.org</code>.
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<code>npm doctor</code> hits a special ping endpoint within the registry. This can also be
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checked with <code>npm ping</code>. If this check fails, you may be using a proxy that
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needs to be configured, or may need to talk to your IT staff to get access over
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HTTPS to <code>registry.npmjs.org</code>.</p>
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<p>This check is done against whichever registry you've configured (you can see
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what that is by running <code>npm config get registry</code>), and if you're using a
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private registry that doesn't support the <code>/whoami</code> endpoint supported by the
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primary registry, this check may fail.</p>
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<h3 id="npm-v"><code>npm -v</code></h3>
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<p>While Node.js may come bundled with a particular version of npm, it's the
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policy of the CLI team that we recommend all users run <code>npm@latest</code> if they
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can. As the CLI is maintained by a small team of contributors, there are only
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resources for a single line of development, so npm's own long-term support
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releases typically only receive critical security and regression fixes. The
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team believes that the latest tested version of npm is almost always likely to
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be the most functional and defect-free version of npm.</p>
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<h3 id="node-v"><code>node -v</code></h3>
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<p>For most users, in most circumstances, the best version of Node will be the
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latest long-term support (LTS) release. Those of you who want access to new
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ECMAscript features or bleeding-edge changes to Node's standard library may be
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running a newer version, and some of you may be required to run an older
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version of Node because of enterprise change control policies. That's OK! But
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in general, the npm team recommends that most users run Node.js LTS.</p>
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<h3 id="npm-config-get-registry"><code>npm config get registry</code></h3>
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<p>Some of you may be installing from private package registries for your project
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or company. That's great! Others of you may be following tutorials or
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StackOverflow questions in an effort to troubleshoot problems you may be
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having. Sometimes, this may entail changing the registry you're pointing at.
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This part of <code>npm doctor</code> just lets you, and maybe whoever's helping you with
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support, know that you're not using the default registry.</p>
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<h3 id="which-git"><code>which git</code></h3>
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<p>While it's documented in the <a href="../../doc/README.html">README</a>, it may not be obvious that npm needs Git
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installed to do many of the things that it does. Also, in some cases
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– especially on Windows – you may have Git set up in such a way that it's not
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accessible via your <code>PATH</code> so that npm can find it. This check ensures that Git
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is available.</p>
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<h3 id="permissions-checks">Permissions checks</h3>
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<ul>
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<li>Your cache must be readable and writable by the user running npm.</li>
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<li>Global package binaries must be writable by the user running npm.</li>
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<li>Your local <code>node_modules</code> path, if you're running <code>npm doctor</code> with a project
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directory, must be readable and writable by the user running npm.</li>
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</ul>
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<h3 id="validate-the-checksums-of-cached-packages">Validate the checksums of cached packages</h3>
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<p>When an npm package is published, the publishing process generates a checksum
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that npm uses at install time to verify that the package didn't get corrupted
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in transit. <code>npm doctor</code> uses these checksums to validate the package tarballs
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in your local cache (you can see where that cache is located with <code>npm config
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get cache</code>, and see what's in that cache with <code>npm cache ls</code> – probably more
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than you were expecting!). In the event that there are corrupt packages in your
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cache, you should probably run <code>npm cache clean</code> and reset the cache.</p>
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<h2 id="see-also">SEE ALSO</h2>
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<ul>
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<li><a href="../cli/npm-bugs.html">npm-bugs(1)</a></li>
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<li><a href="../cli/npm-help.html">npm-help(1)</a></li>
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<li><a href="../cli/npm-ping.html">npm-ping(1)</a></li>
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</ul>
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</div>
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<table border=0 cellspacing=0 cellpadding=0 id=npmlogo>
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<tr><td style="width:180px;height:10px;background:rgb(237,127,127)" colspan=18> </td></tr>
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<tr><td rowspan=4 style="width:10px;height:10px;background:rgb(237,127,127)"> </td><td style="width:40px;height:10px;background:#fff" colspan=4> </td><td style="width:10px;height:10px;background:rgb(237,127,127)" rowspan=4> </td><td style="width:40px;height:10px;background:#fff" colspan=4> </td><td rowspan=4 style="width:10px;height:10px;background:rgb(237,127,127)"> </td><td colspan=6 style="width:60px;height:10px;background:#fff"> </td><td style="width:10px;height:10px;background:rgb(237,127,127)" rowspan=4> </td></tr>
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<tr><td colspan=2 style="width:20px;height:30px;background:#fff" rowspan=3> </td><td style="width:10px;height:10px;background:rgb(237,127,127)" rowspan=3> </td><td style="width:10px;height:10px;background:#fff" rowspan=3> </td><td style="width:20px;height:10px;background:#fff" rowspan=4 colspan=2> </td><td style="width:10px;height:20px;background:rgb(237,127,127)" rowspan=2> </td><td style="width:10px;height:10px;background:#fff" rowspan=3> </td><td style="width:20px;height:10px;background:#fff" rowspan=3 colspan=2> </td><td style="width:10px;height:10px;background:rgb(237,127,127)" rowspan=3> </td><td style="width:10px;height:10px;background:#fff" rowspan=3> </td><td style="width:10px;height:10px;background:rgb(237,127,127)" rowspan=3> </td></tr>
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<tr><td style="width:10px;height:10px;background:#fff" rowspan=2> </td></tr>
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<tr><td style="width:10px;height:10px;background:#fff"> </td></tr>
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<tr><td style="width:60px;height:10px;background:rgb(237,127,127)" colspan=6> </td><td colspan=10 style="width:10px;height:10px;background:rgb(237,127,127)"> </td></tr>
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<tr><td colspan=5 style="width:50px;height:10px;background:#fff"> </td><td style="width:40px;height:10px;background:rgb(237,127,127)" colspan=4> </td><td style="width:90px;height:10px;background:#fff" colspan=9> </td></tr>
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</table>
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<p id="footer">npm-doctor — npm@6.5.0</p>
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