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+ <!DOCTYPE html>
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+ <html lang="en" xmlns="http://www.w3.org/1999/xhtml">
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+ <head>
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+ <title>In Place Upgrade Debian 11 Bullseye to 12 Bookworm</title>
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+ <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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+ <meta charset="UTF-8">
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+ <meta name="keywords" content="In Place Upgrade,Update,Upgrade,Debian,Home Lab,Home Lab Ideas,Bullseye,Bookworm,Update Debian 11 To Debian 12,Debian 11,Debian 11 Bullseye,Debian 12,Debian 12 Bookworm,Linux,In-Place Upgrade,Upgrading Debian In Place,How To,Tutorial,i12bretro">
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+ <meta name="author" content="i12bretro">
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+ <meta name="description" content="In Place Upgrade Debian 11 Bullseye to 12 Bookworm">
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+ <meta name="viewport" content="width=device-width, initial-scale=1.0">
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+ <meta name="revised" content="06/29/2023 02:17:28 PM" />
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+ <link rel="icon" type="image/x-icon" href="includes/favicon.ico">
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+ <script type="text/javascript" src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
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+ <script type="text/javascript" src="includes/js/steps.js"></script>
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+ <link href="css/steps.css" rel="stylesheet" type="text/css" />
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+ </head>
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+ <body>
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+ <div id="gridContainer">
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+ <div class="topMargin"></div>
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+ <div id="listName" class="topMargin">
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+ <h1>In Place Upgrade Debian 11 Bullseye to 12 Bookworm</h1>
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+ </div>
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+ <div></div>
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+ <div id="content">
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+ <ol>
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+ <li>Log into the Debian 11 device</li>
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+ <li>Run the following commands in a terminal window
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+ <div class="codeBlock"># clean apt cache<br />
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+ sudo apt clean<br />
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+ # update apt repositories from bullseye to bookworm<br />
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+ find /etc/apt -type f -name "*.list" -print0 | xargs -0 sudo sed -i.bak "s/bullseye/bookworm/g"<br />
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+ # add optional non-free repos<br />
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+ echo "deb https://deb.debian.org/debian/ bookworm main contrib non-free non-free-firmware" | sudo tee /etc/apt/sources.list<br />
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+ # update software repositories<br />
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+ sudo apt update<br />
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+ # install software updates<br />
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+ sudo apt dist-upgrade -y<br />
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+ # remove unnecessary packages<br />
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+ sudo apt autoremove -y<br />
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+ # clean apt cache<br />
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+ sudo apt clean<br />
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+ # reboot<br />
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+ sudo reboot now</div>
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+ </li>
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+ <li>That's it, Debian 11 Bullseye has been updated in place to Debian 12 Bookworm</li>
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+</ol> </div>
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+ </div>
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+ </body>
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+ </html>
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+
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i12bretro