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| Original file line number | Diff line number | Diff line change |
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| <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> | ||
| <html lang="en"> | ||
| <head> | ||
| <meta charset="utf-8"> | ||
| <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"> | ||
| <meta name="generator" content="Zim 0.75.2"> | ||
| <meta name="description" content="Personal website for my programming, computing and finance hobbies"> | ||
| <meta name="keywords" content="karl, hunter, go, programming, computing, finance, personal, hobby, defiant-fg, defiant"> | ||
| <meta name="Zim template" content="HGE Bootstrap responsive template" /> | ||
| <meta name="template author" content="Hugo Gaibor E."> | ||
| <meta name="Author" content="Karl Hunter"> | ||
| <link rel="icon" href="../../../_resources/images/favicon.ico"> | ||
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| <title>Saturday 28 Sep 2024</title> | ||
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| You can change higlight code box style by choosing a different css style below, | ||
| all styles were included for ease of customization | ||
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| <link rel="stylesheet" href="https://karlhunter.co.uk/res/highlight/styles/base16/github.min.css"> | ||
| <script src="https://karlhunter.co.uk/res/highlight/highlight.min.js"></script> | ||
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| <!-- HGE styles and JS functions for this template --> | ||
| <link href="https://karlhunter.co.uk/res/css/hge-bootstrap_common.css" rel="stylesheet"> | ||
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| </head> | ||
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| <body> | ||
| <nav class="navbar navbar-dark sticky-top bg-dark flex-md-nowrap p-1 justify-content upper-nav-bar"> | ||
| <div class="btn-toolbar" role="toolbar" aria-label="Button groups"> | ||
| <div class="btn-group mr-2" role="group" aria-label="First group"> | ||
| <span class="text-white"> | ||
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| <div class="btn-group mr-2" role="group" aria-label="Navigation group"> | ||
| <button type="button" class="btn btn-info btn-xs" role="button" onclick="location.href='./16.html'">Prev</button> | ||
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| <li><a href="../../../About.html" title="About" class="page">About</a></li> | ||
| <li><a href="../../../Buy_Me_Coffee.html" title="Buy Me Coffee" class="page">Buy Me Coffee</a></li> | ||
| <li><a href="../../../Computing.html" title="Computing" class="page">Computing</a></li> | ||
| <li><a href="../../../Contact.html" title="Contact" class="page">Contact</a></li> | ||
| <li><a href="../../../index.html" title="index" class="page">index</a></li> | ||
| <li><a href="../../../Journal.html" title="Journal" class="page">Journal</a> | ||
| <ul> | ||
| <li><a href="../../2022.html" title="2022" class="page">2022</a></li> | ||
| <li><a href="../../2023.html" title="2023" class="page">2023</a></li> | ||
| <li><a href="../../2024.html" title="2024" class="page">2024</a> | ||
| <ul> | ||
| <li><a href="../01.html" title="01" class="page">01</a></li> | ||
| <li><a href="../02.html" title="02" class="page">02</a></li> | ||
| <li><a href="../03.html" title="03" class="page">03</a></li> | ||
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| <li><a href="../07.html" title="07" class="page">07</a></li> | ||
| <li><a href="../09.html" title="09" class="page">09</a> | ||
| <ul> | ||
| <li><a href="./16.html" title="16" class="page">16</a></li> | ||
| <li><b>28</b></li> | ||
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| <p>Please enable javascript</p></span> | ||
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| <h1>Saturday 28 Sep 2024<a name='Saturday 28 Sep 2024_1_1' class="offset-anchor"></a></h1> | ||
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| <hr> | ||
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| <h2>Unlock ZFS with a key file<a name='Unlock ZFS with a key file_1_2' class="offset-anchor"></a></h2> | ||
| <p> | ||
| Instead of typing a passphrase every time you mount your pool, why not try a key file. After you specify the location of the key file, during the mount of the zfs datasets, this location is queried for the key. You could store they key file on a USB drive or on a remote location (such as network share). | ||
| </p> | ||
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| <p> | ||
| <tt>zfs change-key -l -o keylocation=</tt><a href="file:///mnt/network_share/zfs.key" title="file:///mnt/network_share/zfs.key" class="file"><tt>file:///mnt/network_share/zfs.key</tt></a> <tt>-o keyformat=[passphrase | hex | raw] name_pool/dataset_name</tt> | ||
| </p> | ||
|
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| <p> | ||
| <tt>-l Load key</tt><br> | ||
| <tt>-o options</tt> | ||
| </p> | ||
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| <p> | ||
| For example (using raw mode on a dataset called pictures on a pool named, pool) | ||
| </p> | ||
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| <p> | ||
| <tt>zfs change-key -l -o keylocation=</tt><a href="file:///mnt/network_share/zfs.key" title="file:///mnt/network_share/zfs.key" class="file"><tt>file:///mnt/network_share/zfs.key</tt></a> <tt>-o keyformat=raw pool/pictures</tt> | ||
| </p> | ||
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| <p> | ||
| key formats | ||
| </p> | ||
| <ul> | ||
| <li>hex</li> | ||
| <li>passphrase</li> | ||
| <li>raw</li> | ||
| </ul> | ||
|
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| <p> | ||
| Let's generate a key file. You can use <tt>openssl</tt> or <tt>urandom</tt> to achieve this. | ||
| </p> | ||
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| <p> | ||
| I used a raw file as my key, but you can specify a passphrase instead. That way, you can manually mount if you know the key. That being said, if you backup the raw file you should be able to access. You must backup the key file - for without this you cannot mount (unless you know the password). | ||
| </p> | ||
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| <p> | ||
| <tt>openssl rand -out</tt> <a href="file:///path/to/keyfile/zfs.key" title="/path/to/keyfile/zfs.key" class="file"><tt>/path/to/keyfile/zfs.key</tt></a> <tt>32</tt> | ||
| </p> | ||
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| <ul> | ||
| <li><tt>rand</tt> (randomisation tool)</li> | ||
| <li><tt>-out</tt> (path to the output file)</li> | ||
| <li><tt>32</tt> (32-bit key - ZFS supports up to 32 bits)</li> | ||
| </ul> | ||
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| <p> | ||
| or | ||
| </p> | ||
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| <p> | ||
| <tt>dd if=/dev/urandom of=</tt><a href="file:///path/to/keyfile/zfs.key" title="/path/to/keyfile/zfs.key" class="file"><tt>/path/to/keyfile/zfs.key</tt></a> <tt>bs=32 count=1</tt> | ||
| </p> | ||
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| <ul> | ||
| <li><tt>bs</tt> (choose 32 for a 32-bit key - ZFS supports up to 32 bits)</li> | ||
| <li><tt>count</tt> (create 1 line)</li> | ||
| <li><tt>if</tt> (random device)</li> | ||
| <li><tt>of</tt> (path to the output file)</li> | ||
| </ul> | ||
|
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| <p> | ||
| That's it. The key file will look like this: | ||
| </p> | ||
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| <p> | ||
| <img src="./28/pasted_image.png"> | ||
| </p> | ||
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| <p> | ||
| This is OKAY, but if you want it in a human-readable format, consider using the passphrase or the hex option. | ||
| </p> | ||
|
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| <p> | ||
| <tt>openssl rand -hex -out</tt> <a href="file:///path/to/keyfile/zfs.key" title="/path/to/keyfile/zfs.key" class="file"><tt>/path/to/keyfile/zfs.key</tt></a> <tt>32</tt> | ||
| </p> | ||
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| <p> | ||
| <img src="./28/pasted_image001.png"> | ||
| </p> | ||
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| <span class="backlinks"> | ||
| <hr class='footnotes'> | ||
| <b>Backlinks:</b> | ||
| <br /> | ||
| <a href='../../../index.html'>index</a> | ||
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| <br /> | ||
| <a href='../../Index.html'>Journal:Index</a> | ||
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| <br /> | ||
| <a href='../09.html'>Journal:2024:09</a> | ||
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| </span> | ||
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| </main> | ||
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