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<section id="swupd">
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<span id="swupd-guide"></span><h1>swupd<a class="headerlink" href="#swupd" title="Link to this heading">¶</a></h1>
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<p><strong class="command">swupd</strong> links a Clear Linux* OS installation with upstream updates and
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software.</p>
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<nav class="contents local" id="contents">
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<ul class="simple">
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<li><p><a class="reference internal" href="#description" id="id1">Description</a></p></li>
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<li><p><a class="reference internal" href="#how-it-works" id="id2">How it works</a></p></li>
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<li><p><a class="reference internal" href="#examples" id="id3">Examples</a></p></li>
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<li><p><a class="reference internal" href="#quick-reference" id="id4">Quick reference</a></p></li>
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<li><p><a class="reference internal" href="#related-topics" id="id5">Related topics</a></p></li>
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</ul>
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</nav>
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<section id="description">
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<h2><a class="toc-backref" href="#id1" role="doc-backlink">Description</a><a class="headerlink" href="#description" title="Link to this heading">¶</a></h2>
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<p><strong class="command">swupd</strong> has two main functions:</p>
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<ol class="arabic simple">
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<li><p>Manage software and replace APT or YUM, by installing bundles
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rather than packages.</p></li>
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<li><p>Check for system updates and install them.</p></li>
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</ol>
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<p><strong class="command">swupd</strong> manages overlapping dependencies behind the scenes, ensuring
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that all software is compatible across the system. It can be used to verify
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the OS, clean cached files, and fix issues.</p>
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<p><a class="reference internal" href="../../reference/bundles/bundles.html#bundles"><span class="std std-ref">Bundles</span></a> contain everything needed to deliver a software
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capability. They are the smallest granularity component that is
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managed by Clear Linux OS. A bundle comes with all of its dependencies rather than
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downloading a cascade of package dependencies when installing a piece of
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software.</p>
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<section id="versioning">
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<h3>Versioning<a class="headerlink" href="#versioning" title="Link to this heading">¶</a></h3>
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<p>Using package managers to monitor software version compatibility or
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compare multiple systems on many Linux distributions can be cumbersome.</p>
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<p>With Clear Linux OS <strong class="command">swupd</strong>, versioning happens at the individual file level.
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This means Clear Linux OS generates an entirely new OS version with any set of software
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changes to the system, including software downgrades or removals. This
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rolling release versioning model is similar to <strong class="command">git</strong> internal version
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tracking, where any of the individual file commits are tracked and move the
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pointer forward when changed.</p>
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<p>A number that represents the <strong>current</strong> release of the OS describes the
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versions of all the software on the OS. Each build is composed of a specific
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set of bundles made from a particular version of packages. On a daily basis,
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this matters to system administrators who need to determine which of their
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systems do not have the latest security fixes, or which combinations of
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software have been tested. Every release of the same number is guaranteed to
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contain the same versions of software, so there’s no ambiguity between two
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systems running the same version of Clear Linux OS.</p>
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</section>
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<section id="updating">
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<h3>Updating<a class="headerlink" href="#updating" title="Link to this heading">¶</a></h3>
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<p>Clear Linux OS enforces regular updating of the OS by default and automatically
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checks for updates against a version server. The content server provides the
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file and metadata content for all versions and can be the same as the
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version server. The content url server provides metadata in the form of
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<em>manifests</em>, which list and describe file contents, symlinks,
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and directories. Additionally, the actual content is provided to clients
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in the form of archive files.</p>
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<p>Software updates with Clear Linux OS are also efficient. Unlike package-based
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distributions, <strong class="command">swupd</strong> only updates files that have changed, rather
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than entire packages. For example, it is quite common for an OS security
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patch to be as small as 15 KB. Using binary deltas, Clear Linux OS is able to
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apply only what is needed.</p>
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<p>For details on how to generate update content for Clear Linux OS, see the
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<a class="reference internal" href="mixer.html#mixer"><span class="std std-ref">mixer</span></a> tool.</p>
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</section>
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</section>
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<section id="how-it-works">
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<h2><a class="toc-backref" href="#id2" role="doc-backlink">How it works</a><a class="headerlink" href="#how-it-works" title="Link to this heading">¶</a></h2>
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<section id="prerequisites">
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<h3>Prerequisites<a class="headerlink" href="#prerequisites" title="Link to this heading">¶</a></h3>
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<ul class="simple">
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<li><p>The device is on a well-connected network.</p></li>
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<li><p>The device is able to connect to an update server. The default server is:
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<a class="reference external" href="https://cdn.download.clearlinux.org/update/">https://cdn.download.clearlinux.org/update/</a></p></li>
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</ul>
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</section>
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<section id="updates">
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<h3>Updates<a class="headerlink" href="#updates" title="Link to this heading">¶</a></h3>
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<p>Clear Linux OS updates are automatic by default, but can be set to occur only on
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demand. <strong class="command">swupd</strong> makes sure that regular updates are simple and
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secure. It can also check the validity of currently installed files and
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software, and can correct any problems.</p>
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<section id="manifests">
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<h4>Manifests<a class="headerlink" href="#manifests" title="Link to this heading">¶</a></h4>
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<p>The Clear Linux OS software update content consists of data and metadata. The data is
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the files that end up in the OS. The metadata contains relevant information to
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properly provision the data to the OS file system, as well as update the
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system and add or remove additional content to the OS.</p>
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<p>The manifests are mostly long lists of hashes that describe content.
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Each bundle gets its own manifest file. There is a master manifest
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file that describes all manifests to tie it all together.</p>
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</section>
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<section id="fullfiles-packs-and-delta-packs">
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<h4>Fullfiles, packs, and delta packs<a class="headerlink" href="#fullfiles-packs-and-delta-packs" title="Link to this heading">¶</a></h4>
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<p>To speed up updates and optimize content delivery, update data provisioned to
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a system is obtained by one of the following methods:</p>
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<ul class="simple">
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<li><p><em>Fullfiles</em> are always generated for every file in every release. This
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allows any Clear Linux OS to obtain the exact copy of the content
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for each version directly. This is used if the OS verification
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needs to replace a single file, for instance.</p></li>
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<li><p><em>Packs</em> are available for some releases. They combine many files to speed
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up the creation of installation media and large updates.</p></li>
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<li><p><em>Delta packs</em> are an optimized version of packs that only contain updates
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(binary diffs). They cannot be used without having the original file content.</p></li>
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</ul>
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</section>
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</section>
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<section id="bundle-search">
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<h3>Bundle search<a class="headerlink" href="#bundle-search" title="Link to this heading">¶</a></h3>
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<p><strong class="command">swupd</strong> searches download manifest data for
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bundles that match the term. Enter only one term, or hyphenated term, per
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search. Use the command <strong class="command">man swupd</strong> to learn more.</p>
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<p>Only the base bundle is returned. Bundles can contain other bundles via
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includes. For more details, see <a class="reference external" href="https://github.com/clearlinux/clr-bundles">Bundle Definition Files</a> and its
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subdirectory bundles.</p>
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<p>Bundles that are already installed are marked <strong>(installed)</strong> in search
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results.</p>
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<p>Optionally, you can review our <a class="reference external" href="https://github.com/clearlinux/clr-bundles/tree/master/bundles">bundles</a> on GitHub*.</p>
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</section>
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</section>
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<section id="examples">
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<h2><a class="toc-backref" href="#id3" role="doc-backlink">Examples</a><a class="headerlink" href="#examples" title="Link to this heading">¶</a></h2>
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<section id="example-1-disable-and-enable-automatic-updates">
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<h3>Example 1: Disable and enable automatic updates<a class="headerlink" href="#example-1-disable-and-enable-automatic-updates" title="Link to this heading">¶</a></h3>
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<p>Clear Linux OS updates are automatic by default, but can be set to occur only
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on demand.</p>
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<ol class="arabic">
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<li><p>Verify your current auto-update setting.</p>
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<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>sudo<span class="w"> </span>swupd<span class="w"> </span>autoupdate
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</pre></div>
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</div>
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<p>Output:</p>
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<div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="go">Enabled</span>
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</pre></div>
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</div>
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</li>
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<li><p>Disable automatic updates.</p>
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<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>sudo<span class="w"> </span>swupd<span class="w"> </span>autoupdate<span class="w"> </span>--disable
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</pre></div>
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</div>
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<p>Output:</p>
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<div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="go">Warning: disabling automatic updates may take you out of compliance with your IT policy</span>
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<span class="go">Running systemctl to disable updates</span>
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<span class="go">Created symlink /etc/systemd/system/swupd-update.service → /dev/null.</span>
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<span class="go">Created symlink /etc/systemd/system/swupd-update.timer → /dev/null.</span>
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</pre></div>
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</div>
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</li>
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<li><p>Check manually for updates.</p>
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<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>sudo<span class="w"> </span>swupd<span class="w"> </span>check-update
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</pre></div>
|
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</div>
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</li>
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<li><p>Install an update after identifying one that you need.</p>
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<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>sudo<span class="w"> </span>swupd<span class="w"> </span>update<span class="w"> </span>--version<span class="w"> </span><version<span class="w"> </span>number>
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</pre></div>
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</div>
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</li>
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<li><p>Re-enable automatic installs.</p>
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<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>sudo<span class="w"> </span>swupd<span class="w"> </span>autoupdate<span class="w"> </span>--enable
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</pre></div>
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</div>
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</li>
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</ol>
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</section>
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<section id="example-2-find-and-install-kata-containers">
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<span id="swupd-guide-example-install-bundle"></span><h3>Example 2: Find and install Kata Containers*<a class="headerlink" href="#example-2-find-and-install-kata-containers" title="Link to this heading">¶</a></h3>
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<p>Kata Containers is a popular container implementation. Unlike other
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container implementations, each Kata Container has its own
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kernel instance and runs on its own <abbr title="Virtual Machine">VM</abbr> for
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improved security.</p>
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<p>Clear Linux OS makes it very easy to install, since you only need to add
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one bundle to use <a class="reference external" href="https://clearlinux.org/downloads/containers">Kata Containers</a>: <a class="reference external" href="https://github.com/clearlinux/clr-bundles/blob/master/bundles/containers-virt">containers-virt</a>, despite a
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number of dependencies. Also, check out our tutorial: <a class="reference internal" href="../../tutorials/kata.html#kata"><span class="std std-ref">Kata Containers*</span></a>.</p>
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<ol class="arabic">
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<li><p>Find the correct bundle.</p>
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<p>To return all possible matches for the search string, enter
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<strong class="command">swupd search</strong>, followed by ‘kata’:</p>
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<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>sudo<span class="w"> </span>swupd<span class="w"> </span>search<span class="w"> </span>kata
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</pre></div>
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</div>
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<p>The output should be similar to:</p>
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<div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="go">Bundle with the best search result:</span>
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<span class="go">containers-virt - Run container applications from Dockerhub in</span>
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<span class="go">lightweight virtual machines</span>
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<span class="go">This bundle can be installed with:</span>
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<span class="go"> swupd bundle-add containers-virt</span>
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<span class="go">Alternative bundle options are</span>
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<span class="go"> cloud-native-basic - Contains ClearLinux native software for Cloud</span>
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</pre></div>
|
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</div>
|
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<div class="admonition note">
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<p class="admonition-title">Note</p>
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<p>If your search does not produce results with a specific term, shorten
|
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the search term. For example, use <em>kube</em> instead of <em>kubernetes</em>.</p>
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</div>
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</li>
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<li><p>Add the bundle.</p>
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<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>sudo<span class="w"> </span>swupd<span class="w"> </span>bundle-add<span class="w"> </span>containers-virt
|
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</pre></div>
|
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</div>
|
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<div class="admonition note">
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<p class="admonition-title">Note</p>
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<p>To add multiple bundles, add a space followed by the bundle name.</p>
|
||
</div>
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<p>The output of a successful installation should be similar to:</p>
|
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<div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="go">Downloading packs...</span>
|
||
|
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<span class="go">Extracting containers-virt pack for version 24430</span>
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<span class="go"> ...50%</span>
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<span class="go">Extracting kernel-container pack for version 24430</span>
|
||
<span class="go"> ...100%</span>
|
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<span class="go">Starting download of remaining update content. This may take a while...</span>
|
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<span class="go"> ...100%</span>
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<span class="go">Finishing download of update content...</span>
|
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<span class="go">Installing bundle(s) files...</span>
|
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<span class="go"> ...100%</span>
|
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<span class="go">Calling post-update helper scripts.</span>
|
||
<span class="go">Successfully installed 1 bundle</span>
|
||
</pre></div>
|
||
</div>
|
||
</li>
|
||
</ol>
|
||
</section>
|
||
<section id="example-3-verify-and-correct-system-file-mismatch">
|
||
<h3>Example 3: Verify and correct system file mismatch<a class="headerlink" href="#example-3-verify-and-correct-system-file-mismatch" title="Link to this heading">¶</a></h3>
|
||
<p><strong class="command">swupd</strong> can determine whether system directories and files have
|
||
been added to, overwritten, removed, or modified (e.g., permissions).</p>
|
||
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>sudo<span class="w"> </span>swupd<span class="w"> </span>diagnose
|
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</pre></div>
|
||
</div>
|
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<p>All directories that are watched by <strong class="command">swupd</strong> are verified according
|
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to the manifest data. Hash mismatches are flagged as follows:</p>
|
||
<div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="go">Verifying version 23300</span>
|
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<span class="go">Verifying files</span>
|
||
<span class="go"> ...0%</span>
|
||
<span class="go">Hash mismatch for file: /usr/bin/chardetect</span>
|
||
<span class="go">...</span>
|
||
<span class="go">...</span>
|
||
<span class="go">Hash mismatch for file: /usr/lib/python3.6/site-packages/urllib3/util/wait.py</span>
|
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<span class="go"> ...100%</span>
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||
<span class="go">Inspected 237180 files</span>
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<span class="go"> 423 files did not match</span>
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||
<span class="go">Verify successful</span>
|
||
</pre></div>
|
||
</div>
|
||
<p>In this case, Python* packages that were installed on top of the default
|
||
install were flagged as mismatched. <strong class="command">swupd</strong> can be directed to
|
||
ignore or fix issues based on command line options.</p>
|
||
<p><strong class="command">swupd</strong> can correct any issues it detects. Additional directives
|
||
can be added including a white list of directories to be ignored.</p>
|
||
<p>The following command repairs issues, removes unknown items, and
|
||
ignores files or directories matching <code class="file docutils literal notranslate"><span class="pre">/usr/lib/python</span></code>:</p>
|
||
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>sudo<span class="w"> </span>swupd<span class="w"> </span>repair<span class="w"> </span>--picky<span class="w"> </span>--picky-whitelist<span class="o">=</span>/usr/lib/python
|
||
</pre></div>
|
||
</div>
|
||
</section>
|
||
</section>
|
||
<section id="quick-reference">
|
||
<span id="swupd-quick-ref"></span><h2><a class="toc-backref" href="#id4" role="doc-backlink">Quick reference</a><a class="headerlink" href="#quick-reference" title="Link to this heading">¶</a></h2>
|
||
<dl class="simple">
|
||
<dt>swupd info</dt><dd><p>Returns the currently installed version and update servers.</p>
|
||
</dd>
|
||
<dt>swupd update <version number></dt><dd><p>Updates to a specific version or updates to latest version if no
|
||
arguments are used.</p>
|
||
</dd>
|
||
<dt>swupd bundle-list [–all]</dt><dd><p>Lists installed bundles.</p>
|
||
</dd>
|
||
<dt>swupd search <term></dt><dd><p>Finds a bundle that contains your search term.</p>
|
||
</dd>
|
||
<dt>swupd bundle-add <bundle name></dt><dd><p>Adds a bundle.</p>
|
||
</dd>
|
||
<dt>swupd bundle-remove <bundle name></dt><dd><p>Removes a bundle.</p>
|
||
</dd>
|
||
<dt>swupd –help</dt><dd><p>Lists additional <strong class="command">swupd</strong> commands.</p>
|
||
</dd>
|
||
<dt>man swupd</dt><dd><p>Opens the <strong class="command">swupd</strong> man page.</p>
|
||
</dd>
|
||
</dl>
|
||
<p>Refer to <a class="reference external" href="https://github.com/clearlinux/swupd-client/blob/master/docs/swupd.1.rst">swupd source documentation</a> on GitHub for more details.</p>
|
||
</section>
|
||
<section id="related-topics">
|
||
<h2><a class="toc-backref" href="#id5" role="doc-backlink">Related topics</a><a class="headerlink" href="#related-topics" title="Link to this heading">¶</a></h2>
|
||
<ul class="simple">
|
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<li><p><a class="reference internal" href="autospec.html#autospec"><span class="std std-ref">autospec</span></a></p></li>
|
||
<li><p><a class="reference internal" href="mixer.html#mixer"><span class="std std-ref">mixer</span></a></p></li>
|
||
<li><p><a class="reference internal" href="../../reference/bundles/bundles.html#bundles"><span class="std std-ref">Available bundles</span></a></p></li>
|
||
</ul>
|
||
</section>
|
||
</section>
|
||
|
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|
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<div>
|
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<h3><a href="../../index.html">Table of Contents</a></h3>
|
||
<ul>
|
||
<li><a class="reference internal" href="#">swupd</a><ul>
|
||
<li><a class="reference internal" href="#description">Description</a><ul>
|
||
<li><a class="reference internal" href="#versioning">Versioning</a></li>
|
||
<li><a class="reference internal" href="#updating">Updating</a></li>
|
||
</ul>
|
||
</li>
|
||
<li><a class="reference internal" href="#how-it-works">How it works</a><ul>
|
||
<li><a class="reference internal" href="#prerequisites">Prerequisites</a></li>
|
||
<li><a class="reference internal" href="#updates">Updates</a><ul>
|
||
<li><a class="reference internal" href="#manifests">Manifests</a></li>
|
||
<li><a class="reference internal" href="#fullfiles-packs-and-delta-packs">Fullfiles, packs, and delta packs</a></li>
|
||
</ul>
|
||
</li>
|
||
<li><a class="reference internal" href="#bundle-search">Bundle search</a></li>
|
||
</ul>
|
||
</li>
|
||
<li><a class="reference internal" href="#examples">Examples</a><ul>
|
||
<li><a class="reference internal" href="#example-1-disable-and-enable-automatic-updates">Example 1: Disable and enable automatic updates</a></li>
|
||
<li><a class="reference internal" href="#example-2-find-and-install-kata-containers">Example 2: Find and install Kata Containers*</a></li>
|
||
<li><a class="reference internal" href="#example-3-verify-and-correct-system-file-mismatch">Example 3: Verify and correct system file mismatch</a></li>
|
||
</ul>
|
||
</li>
|
||
<li><a class="reference internal" href="#quick-reference">Quick reference</a></li>
|
||
<li><a class="reference internal" href="#related-topics">Related topics</a></li>
|
||
</ul>
|
||
</li>
|
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<h3>This Page</h3>
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