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	<title>Raspbian &#8211; acm&#039;s blog</title>
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		<title>apt更換mirror站台後遭遇GPG NO_PUBKEY問題</title>
		<link>https://blog.acm.idv.tw/2022/07/17/apt%e6%9b%b4%e6%8f%9bmirror%e7%ab%99%e5%8f%b0%e5%be%8c%e9%81%ad%e9%81%87gpg-no_pubkey%e5%95%8f%e9%a1%8c/</link>
					<comments>https://blog.acm.idv.tw/2022/07/17/apt%e6%9b%b4%e6%8f%9bmirror%e7%ab%99%e5%8f%b0%e5%be%8c%e9%81%ad%e9%81%87gpg-no_pubkey%e5%95%8f%e9%a1%8c/#respond</comments>
		
		<dc:creator><![CDATA[kaffa9]]></dc:creator>
		<pubDate>Sun, 17 Jul 2022 07:28:49 +0000</pubDate>
				<category><![CDATA[系統維運]]></category>
		<category><![CDATA[apt]]></category>
		<category><![CDATA[Debian]]></category>
		<category><![CDATA[Linux]]></category>
		<category><![CDATA[Raspberry Pi]]></category>
		<category><![CDATA[Raspbian]]></category>
		<category><![CDATA[Ubuntu]]></category>
		<guid isPermaLink="false">https://kaffa9.com/?p=172</guid>

					<description><![CDATA[前一陣子購入了一批Raspberry Pi Desktop Kit，隨附的記憶卡中已經預先裝載好Raspbian，沒想到近日在更新套件時，頻頻遇到某某套件無法更...<p class="read-more"><a class="btn btn-default" href="https://blog.acm.idv.tw/2022/07/17/apt%e6%9b%b4%e6%8f%9bmirror%e7%ab%99%e5%8f%b0%e5%be%8c%e9%81%ad%e9%81%87gpg-no_pubkey%e5%95%8f%e9%a1%8c/"> Read More<span class="screen-reader-text">  Read More</span></a></p>]]></description>
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<p>前一陣子購入了一批Raspberry Pi Desktop Kit，隨附的記憶卡中已經預先裝載好Raspbian，沒想到近日在更新套件時，頻頻遇到某某套件無法更新的問題，apt錯誤訊息建議使用&#8211;fix-missing參數，實際執行完全無法解決問題。重新下了apt-get upgrade觀察了一下，發現更新失敗幾乎都是連不上某台伺服器（所以無法下載套件）造成的，於是心生一計──修改apt source list裡的URL，改為指向mirror site試試。</p>



<span id="more-172"></span>



<p>修改完後，想不到下了apt update直接告訴我GPG Error，這次是NO_PUBKEY的訊息。拜完谷歌大神，很快就得到答案：</p>



<blockquote class="wp-block-quote is-layout-flow wp-block-quote-is-layout-flow"><p><a href="https://askubuntu.com/questions/13065/how-do-i-fix-the-gpg-error-no-pubkey">https://askubuntu.com/questions/13065/how-do-i-fix-the-gpg-error-no-pubkey</a></p></blockquote>



<p>方法1：</p>



<pre class="EnlighterJSRAW" data-enlighter-language="shell" data-enlighter-theme="" data-enlighter-highlight="" data-enlighter-linenumbers="" data-enlighter-lineoffset="" data-enlighter-title="" data-enlighter-group="">sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys &lt;PUBKEY>
# &lt;PUBKEY> 為apt回應的NO_PUBKEY錯誤訊息中的金鑰值</pre>



<p>方法2：</p>



<pre class="EnlighterJSRAW" data-enlighter-language="shell" data-enlighter-theme="" data-enlighter-highlight="" data-enlighter-linenumbers="" data-enlighter-lineoffset="" data-enlighter-title="" data-enlighter-group="">sudo gpg --keyserver pgpkeys.mit.edu --recv-key  &lt;PUBKEY>
# &lt;PUBKEY> 為apt回應的NO_PUBKEY錯誤訊息中的金鑰值
sudo gpg -a --export &lt;PUBKEY> | sudo apt-key add -
sudo apt-get update</pre>
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