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= Linux Frequently Asked Questions ! |
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Apostolos rootApostolos@swarmlab.io |
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// Metadata: |
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:description: Intro and Install |
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:keywords: Linux |
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:data-uri: |
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:toc: right |
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:toc-title: Πίνακας περιεχομένων |
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:toclevels: 4 |
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:source-highlighter: highlight |
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:icons: font |
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[NOTE] |
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**** |
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Frequently Asked Questions |
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**** |
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== What is the difference between a symbolic link and a hard link? |
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- A file in the file system is basically a link to an inode. |
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- A hard link, then, just creates another file with a link to the same underlying inode. |
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A symbolic or soft link is an actual link to the original file, whereas a hard link is a mirror copy of the original file. |
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If you delete the original file, the soft link has no value, because it points to a non-existent file. |
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But in the case of hard link, it is entirely opposite. Even if you delete the original file, the hard link will still has the data of the original file. |
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Because hard link acts as a mirror copy of the original file. |
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NOTE: When you delete a file, it removes one link to the underlying inode. The inode is only deleted (or deletable/over-writable) when all links to the inode have been deleted. |
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CAUTION: Hard links are only valid within the same File System. Symbolic links can span file systems as they are simply the name of another file. |
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<meta name="author" content="Apostolos rootApostolos@swarmlab.io"> |
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<title>Linux Frequently Asked Questions !</title> |
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</head> |
|||
<body class="article toc2 toc-right"> |
|||
<div id="header"> |
|||
<h1>Linux Frequently Asked Questions !</h1> |
|||
<div class="details"> |
|||
<span id="author" class="author">Apostolos rootApostolos@swarmlab.io</span><br> |
|||
</div> |
|||
<div id="toc" class="toc2"> |
|||
<div id="toctitle">Πίνακας περιεχομένων</div> |
|||
<ul class="sectlevel1"> |
|||
<li><a href="#_what_is_the_difference_between_a_symbolic_link_and_a_hard_link">1. What is the difference between a symbolic link and a hard link?</a></li> |
|||
</ul> |
|||
</div> |
|||
</div> |
|||
<div id="content"> |
|||
<div id="preamble"> |
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<div class="sectionbody"> |
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<div class="paragraph"> |
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<p><br></p> |
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</div> |
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<div class="admonitionblock note"> |
|||
<table> |
|||
<tr> |
|||
<td class="icon"> |
|||
<i class="fa icon-note" title="Note"></i> |
|||
</td> |
|||
<td class="content"> |
|||
<div class="paragraph"> |
|||
<p>Frequently Asked Questions</p> |
|||
</div> |
|||
</td> |
|||
</tr> |
|||
</table> |
|||
</div> |
|||
</div> |
|||
</div> |
|||
<div class="sect1"> |
|||
<h2 id="_what_is_the_difference_between_a_symbolic_link_and_a_hard_link">1. What is the difference between a symbolic link and a hard link?</h2> |
|||
<div class="sectionbody"> |
|||
<div class="ulist"> |
|||
<ul> |
|||
<li> |
|||
<p>A file in the file system is basically a link to an inode.</p> |
|||
</li> |
|||
<li> |
|||
<p>A hard link, then, just creates another file with a link to the same underlying inode.</p> |
|||
<div class="literalblock"> |
|||
<div class="content"> |
|||
<pre>A symbolic or soft link is an actual link to the original file, whereas a hard link is a mirror copy of the original file.</pre> |
|||
</div> |
|||
</div> |
|||
<div class="literalblock"> |
|||
<div class="content"> |
|||
<pre>If you delete the original file, the soft link has no value, because it points to a non-existent file.</pre> |
|||
</div> |
|||
</div> |
|||
<div class="literalblock"> |
|||
<div class="content"> |
|||
<pre>But in the case of hard link, it is entirely opposite. Even if you delete the original file, the hard link will still has the data of the original file.</pre> |
|||
</div> |
|||
</div> |
|||
<div class="literalblock"> |
|||
<div class="content"> |
|||
<pre>Because hard link acts as a mirror copy of the original file.</pre> |
|||
</div> |
|||
</div> |
|||
</li> |
|||
</ul> |
|||
</div> |
|||
<div class="paragraph"> |
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<p>INFO: When you delete a file, it removes one link to the underlying inode. The inode is only deleted (or deletable/over-writable) when all links to the inode have been deleted.</p> |
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</div> |
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<div class="admonitionblock caution"> |
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<table> |
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<tr> |
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<td class="icon"> |
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<i class="fa icon-caution" title="Caution"></i> |
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</td> |
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<td class="content"> |
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Hard links are only valid within the same File System. Symbolic links can span file systems as they are simply the name of another file. |
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</td> |
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</tr> |
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</table> |
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</div> |
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</div> |
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</div> |
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</div> |
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<div id="footer"> |
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<div id="footer-text"> |
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Last updated 2020-11-06 09:59:11 UTC |
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</div> |
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</div> |
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</body> |
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</html> |
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