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	<title>swap &#8211; 21點情報網</title>
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		<title>CentOS/Red Hat增加swap空間</title>
		<link>https://ailog.tw/lifelog/2021/07/10/linux-swap/</link>
		
		<dc:creator><![CDATA[blackjack]]></dc:creator>
		<pubDate>Sat, 10 Jul 2021 10:34:16 +0000</pubDate>
				<category><![CDATA[3C資訊]]></category>
		<category><![CDATA[Linux]]></category>
		<category><![CDATA[CentOS/Red Hat增加swap空間]]></category>
		<category><![CDATA[swap]]></category>
		<category><![CDATA[暫存]]></category>
		<category><![CDATA[記憶體分頁]]></category>
		<guid isPermaLink="false">https://ailog.tw/lifelog/?p=10175</guid>

					<description><![CDATA[Linux有時會遇上系統的swap空間不足需要新增，小編今天要介紹如何在既有的系統中新增swap空間。01、查 &#8230; <p class="link-more"><a href="https://ailog.tw/lifelog/2021/07/10/linux-swap/" class="more-link">閱讀全文<span class="screen-reader-text">〈CentOS/Red Hat增加swap空間〉</span></a></p>]]></description>
										<content:encoded><![CDATA[<p><span style="font-size: 14pt; font-family: verdana, geneva;">Linux有時會遇上系統的swap空間不足需要新增，小編今天要介紹如何在既有的系統中新增swap空間。<span id="more-10175"></span><strong>01、查看目前系統的swap狀態</strong><br />
swapon -s<br />
<img fetchpriority="high" decoding="async" class="alignnone size-full wp-image-10176" src="https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-01.png" alt="" width="887" height="69" srcset="https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-01.png 887w, https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-01-300x23.png 300w, https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-01-768x60.png 768w" sizes="(max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px" /><br />
</span></p>
<p><strong><span style="font-size: 14pt; font-family: verdana, geneva;">02、查看系統磁碟狀態</span></strong><br />
<span style="font-size: 14pt; font-family: verdana, geneva;">df</span><br />
<span style="font-size: 14pt; font-family: verdana, geneva;"><img decoding="async" class="alignnone size-full wp-image-10177" src="https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-02.png" alt="" width="792" height="316" srcset="https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-02.png 792w, https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-02-300x120.png 300w, https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-02-768x306.png 768w" sizes="(max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px" /></span></p>
<p><strong><span style="font-size: 14pt; font-family: verdana, geneva;">03、建立一個2GB的swap檔案</span></strong><br />
<span style="font-size: 14pt; font-family: verdana, geneva;">dd if=/dev/zero of=/swapfile bs=1024 count=2048k</span><br />
<span style="font-size: 14pt; font-family: verdana, geneva;"><img decoding="async" class="alignnone size-full wp-image-10178" src="https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-03.png" alt="" width="758" height="88" srcset="https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-03.png 758w, https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-03-300x35.png 300w" sizes="(max-width: 706px) 89vw, (max-width: 767px) 82vw, 740px" /></span></p>
<p><strong><span style="font-size: 14pt; font-family: verdana, geneva;">04、初始化swap</span></strong><br />
<span style="font-size: 14pt; font-family: verdana, geneva;">mkswap /swapfile</span><br />
<span style="font-size: 14pt; font-family: verdana, geneva;"><img loading="lazy" decoding="async" class="alignnone size-full wp-image-10179" src="https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-04.png" alt="" width="575" height="66" srcset="https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-04.png 575w, https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-04-300x34.png 300w" sizes="auto, (max-width: 575px) 100vw, 575px" /></span></p>
<p><strong><span style="font-size: 14pt; font-family: verdana, geneva;">05、啟用swap</span></strong><br />
<span style="font-size: 14pt; font-family: verdana, geneva;">swapon /swapfile</span><br />
<span style="font-size: 14pt; font-family: verdana, geneva;"><img loading="lazy" decoding="async" class="alignnone size-full wp-image-10180" src="https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-05.png" alt="" width="678" height="45" srcset="https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-05.png 678w, https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-05-300x20.png 300w" sizes="auto, (max-width: 678px) 100vw, 678px" /></span></p>
<p><strong><span style="font-size: 14pt; font-family: verdana, geneva;">06、重新檢查swap狀態</span></strong><br />
<span style="font-size: 14pt; font-family: verdana, geneva;">swapon -s</span><br />
<span style="font-size: 14pt; font-family: verdana, geneva;"><img loading="lazy" decoding="async" class="alignnone size-full wp-image-10181" src="https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-06.png" alt="" width="890" height="87" srcset="https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-06.png 890w, https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-06-300x29.png 300w, https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-06-768x75.png 768w" sizes="auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px" /></span></p>
<p><strong><span style="font-size: 14pt; font-family: verdana, geneva;">07、設定開機自動掛載swap</span></strong><br />
<span style="font-size: 14pt; font-family: verdana, geneva;">echo &#8220;/swapfile swap swap defaults 0 0&#8221; &gt;&gt; /etc/fstab</span><br />
<span style="font-size: 14pt; font-family: verdana, geneva;"><img loading="lazy" decoding="async" class="alignnone size-full wp-image-10182" src="https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-07.png" alt="" width="813" height="45" srcset="https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-07.png 813w, https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-07-300x17.png 300w, https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-07-768x43.png 768w" sizes="auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px" /></span></p>
<p><strong><span style="font-size: 14pt; font-family: verdana, geneva;">08、變更swap檔案擁有者</span></strong><br />
<span style="font-size: 14pt; font-family: verdana, geneva;">chown root:root /swapfile</span><br />
<span style="font-size: 14pt; font-family: verdana, geneva;"><img loading="lazy" decoding="async" class="alignnone size-full wp-image-10183" src="https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-08.png" alt="" width="501" height="43" srcset="https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-08.png 501w, https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-08-300x26.png 300w" sizes="auto, (max-width: 501px) 100vw, 501px" /></span></p>
<p><strong><span style="font-size: 14pt; font-family: verdana, geneva;">09、變更swap檔案存取權限</span></strong><br />
<span style="font-size: 14pt; font-family: verdana, geneva;">chmod 0600 /swapfile</span><br />
<span style="font-size: 14pt; font-family: verdana, geneva;"><img loading="lazy" decoding="async" class="alignnone size-full wp-image-10184" src="https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-09.png" alt="" width="438" height="45" srcset="https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-09.png 438w, https://ailog.tw/lifelog/wp-content/uploads/2021/07/swapon-09-300x31.png 300w" sizes="auto, (max-width: 438px) 100vw, 438px" /></span></p>
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