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<!DOCTYPE html><html><head><meta name="viewport" content="width=device-width"/><meta charSet="utf-8"/><title>systemd-journald</title><script src="https://polyfill.io/v3/polyfill.min.js?features=es6"></script><script id="MathJax-script" async="" src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js"></script><script type="text/x-mathjax-config">
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</script><meta name="next-head-count" content="6"/><link rel="preload" href="/wiki/_next/static/css/52fc2ba29703df73922c.css" as="style"/><link rel="stylesheet" href="/wiki/_next/static/css/52fc2ba29703df73922c.css" data-n-g=""/><noscript data-n-css=""></noscript><link rel="preload" href="/wiki/_next/static/chunks/main-ae4733327bd95c4ac325.js" as="script"/><link rel="preload" href="/wiki/_next/static/chunks/webpack-50bee04d1dc61f8adf5b.js" as="script"/><link rel="preload" href="/wiki/_next/static/chunks/framework.9d524150d48315f49e80.js" as="script"/><link rel="preload" href="/wiki/_next/static/chunks/commons.0e1c3f9aa780c2dfe9f0.js" as="script"/><link rel="preload" href="/wiki/_next/static/chunks/pages/_app-8e3d0c58a60ec788aa69.js" as="script"/><link rel="preload" href="/wiki/_next/static/chunks/940643274e605e7596ecea1f2ff8d83317a3fb76.4841a16762f602a59f00.js" as="script"/><link rel="preload" href="/wiki/_next/static/chunks/pages/%5B%5B...slug%5D%5D-1aa198f87ede1cd0e1dc.js" as="script"/></head><body><div id="__next"><main><h1>systemd-journald</h1><section class="post-metadata"><span>Date: <!-- -->2021-08-07 20:12:30 +08:00</span><span>Date modified: <!-- -->2021-08-07 20:17:23 +08:00</span></section><nav class="toc"><ol class="toc-level toc-level-1"></ol></nav><p>systemd has a journal service storing logs from units.
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It provides a consistent and structured way how to check the logs.
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</p><p>The service also has the following interfaces.
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</p><ul><li><p><code class="inline-verbatim">journald</code> is the system logging functionality of systemd.
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</p></li><li><p>It comes with the system daemon service and the <code class="inline-verbatim">journalctl</code> command.
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See <a href="/wiki/cli.journalctl">Command line: journalctl</a> for more details.
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</p></li></ul><section><h2>Backlinks</h2><ul><li><a href="/wiki/cli.journalctl">Command line: journalctl</a></li><li><a href="/wiki/linux.systemd">systemd</a></li></ul></section></main></div><script id="__NEXT_DATA__" type="application/json">{"props":{"pageProps":{"metadata":{"date":"2021-08-07 20:12:30 +08:00","date_modified":"2021-08-07 20:17:23 +08:00","language":"en","source":""},"title":"systemd-journald","hast":{"type":"root","children":[{"type":"element","tagName":"nav","properties":{"className":"toc"},"children":[{"type":"element","tagName":"ol","properties":{"className":"toc-level toc-level-1"},"children":[]}]},{"type":"element","tagName":"p","properties":{},"children":[{"type":"text","value":"systemd has a journal service storing logs from units.\nIt provides a consistent and structured way how to check the logs.\n"}]},{"type":"element","tagName":"p","properties":{},"children":[{"type":"text","value":"The service also has the following interfaces.\n"}]},{"type":"element","tagName":"ul","properties":{},"children":[{"type":"element","tagName":"li","properties":{},"children":[{"type":"element","tagName":"p","properties":{},"children":[{"type":"element","tagName":"code","properties":{"className":["inline-verbatim"]},"children":[{"type":"text","value":"journald"}]},{"type":"text","value":" is the system logging functionality of systemd.\n"}]}]},{"type":"element","tagName":"li","properties":{},"children":[{"type":"element","tagName":"p","properties":{},"children":[{"type":"text","value":"It comes with the system daemon service and the "},{"type":"element","tagName":"code","properties":{"className":["inline-verbatim"]},"children":[{"type":"text","value":"journalctl"}]},{"type":"text","value":" command.\n See "},{"type":"element","tagName":"a","properties":{"href":"/cli.journalctl"},"children":[{"type":"text","value":"Command line: journalctl"}]},{"type":"text","value":" for more details.\n"}]}]}]}]},"backlinks":[{"path":"/cli.journalctl","title":"Command line: journalctl"},{"path":"/linux.systemd","title":"systemd"}]},"__N_SSG":true},"page":"/[[...slug]]","query":{"slug":["linux.systemd.journal"]},"buildId":"Ie9t5zutrXP6Of75Cb5xF","assetPrefix":"/wiki","nextExport":false,"isFallback":false,"gsp":true}</script><script nomodule="" src="/wiki/_next/static/chunks/polyfills-99d808df29361cf7ffb1.js"></script><script src="/wiki/_next/static/chunks/main-ae4733327bd95c4ac325.js" async=""></script><script src="/wiki/_next/static/chunks/webpack-50bee04d1dc61f8adf5b.js" async=""></script><script src="/wiki/_next/static/chunks/framework.9d524150d48315f49e80.js" async=""></script><script src="/wiki/_next/static/chunks/commons.0e1c3f9aa780c2dfe9f0.js" async=""></script><script src="/wiki/_next/static/chunks/pages/_app-8e3d0c58a60ec788aa69.js" async=""></script><script src="/wiki/_next/static/chunks/940643274e605e7596ecea1f2ff8d83317a3fb76.4841a16762f602a59f00.js" async=""></script><script src="/wiki/_next/static/chunks/pages/%5B%5B...slug%5D%5D-1aa198f87ede1cd0e1dc.js" async=""></script><script src="/wiki/_next/static/Ie9t5zutrXP6Of75Cb5xF/_buildManifest.js" async=""></script><script src="/wiki/_next/static/Ie9t5zutrXP6Of75Cb5xF/_ssgManifest.js" async=""></script></body></html>
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