diff options
| author |   Patrick J Volkerding <volkerdi@slackware.com> | 2009-08-26 10:00:38 -0500 |
|---|---|---|
| committer |   Eric Hameleers <alien@slackware.com> | 2018-05-31 22:41:17 +0200 |
| commit | 5a12e7c134274dba706667107d10d231517d3e05 (patch) | |
| tree | 55718d5acb710fde798d9f38d0bbaf594ed4b296 /slackbook/html/filesystem-structure-links.html | |
| download | current-5a12e7c134274dba706667107d10d231517d3e05.tar.gz current-5a12e7c134274dba706667107d10d231517d3e05.tar.xz | |
Slackware 13.0slackware-13.0
Wed Aug 26 10:00:38 CDT 2009
Slackware 13.0 x86_64 is released as stable! Thanks to everyone who
helped make this release possible -- see the RELEASE_NOTES for the
credits. The ISOs are off to the replicator. This time it will be a
6 CD-ROM 32-bit set and a dual-sided 32-bit/64-bit x86/x86_64 DVD.
We're taking pre-orders now at store.slackware.com. Please consider
picking up a copy to help support the project. Once again, thanks to
the entire Slackware community for all the help testing and fixing
things and offering suggestions during this development cycle.
As always, have fun and enjoy! -P.
Diffstat (limited to 'slackbook/html/filesystem-structure-links.html')
| -rw-r--r-- | slackbook/html/filesystem-structure-links.html | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/slackbook/html/filesystem-structure-links.html b/slackbook/html/filesystem-structure-links.html new file mode 100644 index 000000000..451270e5e --- /dev/null +++ b/slackbook/html/filesystem-structure-links.html @@ -0,0 +1,105 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" + "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> +<html xmlns="http://www.w3.org/1999/xhtml"> +<head> +<meta name="generator" content="HTML Tidy, see www.w3.org" /> +<title>Links</title> +<meta name="GENERATOR" content="Modular DocBook HTML Stylesheet Version 1.7" /> +<link rel="HOME" title="Slackware Linux Essentials" href="index.html" /> +<link rel="UP" title="Filesystem Structure" href="filesystem-structure.html" /> +<link rel="PREVIOUS" title="Permissions" href="filesystem-structure-permissions.html" /> +<link rel="NEXT" title="Mounting Devices" href="filesystem-structure-mounting.html" /> +<link rel="STYLESHEET" type="text/css" href="docbook.css" /> +<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> +</head> +<body class="SECT1" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#840084" +alink="#0000FF"> +<div class="NAVHEADER"> +<table summary="Header navigation table" width="100%" border="0" cellpadding="0" +cellspacing="0"> +<tr> +<th colspan="3" align="center">Slackware Linux Essentials</th> +</tr> + +<tr> +<td width="10%" align="left" valign="bottom"><a +href="filesystem-structure-permissions.html" accesskey="P">Prev</a></td> +<td width="80%" align="center" valign="bottom">Chapter 9 Filesystem Structure</td> +<td width="10%" align="right" valign="bottom"><a +href="filesystem-structure-mounting.html" accesskey="N">Next</a></td> +</tr> +</table> + +<hr align="LEFT" width="100%" /> +</div> + +<div class="SECT1"> +<h1 class="SECT1"><a id="FILESYSTEM-STRUCTURE-LINKS" +name="FILESYSTEM-STRUCTURE-LINKS">9.3 Links</a></h1> + +<p>Links are pointers between files. With links, you can have files exist in many +locations and be accessible by many names. There are two types of links: hard and +soft.</p> + +<p>Hard links are names for a particular file. They can only exist within a single +filesystem and are only removed when the real name is removed from the system. These are +useful in some cases, but many users find the soft link to be more versatile.</p> + +<p>The soft link, also called a symbolic link, can point to a file outside of its +filesystem. It is actually a small file containing the information it needs. You can add +and remove soft links without affecting the actual file. And since a symbolic link is +actually a small file containing its own information, they can even point at a directory. +It's rather common to have <tt class="FILENAME">/var/tmp</tt> actually be a symbolic link +to <tt class="FILENAME">/tmp</tt> for example.</p> + +<p>Links do not have their own set of permissions or ownerships, but instead reflect +those of the file they point to. Slackware uses mostly soft links. Here is a common +example:</p> + +<table border="0" bgcolor="#E0E0E0" width="100%"> +<tr> +<td> +<pre class="SCREEN"> +<samp class="PROMPT">%</samp> <kbd class="USERINPUT">ls -l /bin/sh</kbd> +lrwxrwxrwx 1 root root 4 Apr 6 12:34 /bin/sh -> bash +</pre> +</td> +</tr> +</table> + +<p>The <tt class="COMMAND">sh</tt> shell under Slackware is actually <tt +class="COMMAND">bash</tt>. Removing links is done using <tt class="COMMAND">rm</tt>. The +<tt class="COMMAND">ln</tt> command is used to create links. These commands will be +discussed in more depth in <a href="file-commands.html">Chapter 10</a>.</p> + +<p>It's very important to be careful about symlinks in particular. Once, I was working on +a machine that was consistently failing to back-up to tape each night. Two symlinks had +been made to directories beneath each other. The back-up software kept appending those +same directories to the tape until it was out of space. Normally, a set of checks will +prevent creating a symlink in this situation, but ours was a special case.</p> +</div> + +<div class="NAVFOOTER"> +<hr align="LEFT" width="100%" /> +<table summary="Footer navigation table" width="100%" border="0" cellpadding="0" +cellspacing="0"> +<tr> +<td width="33%" align="left" valign="top"><a href="filesystem-structure-permissions.html" +accesskey="P">Prev</a></td> +<td width="34%" align="center" valign="top"><a href="index.html" +accesskey="H">Home</a></td> +<td width="33%" align="right" valign="top"><a href="filesystem-structure-mounting.html" +accesskey="N">Next</a></td> +</tr> + +<tr> +<td width="33%" align="left" valign="top">Permissions</td> +<td width="34%" align="center" valign="top"><a href="filesystem-structure.html" +accesskey="U">Up</a></td> +<td width="33%" align="right" valign="top">Mounting Devices</td> +</tr> +</table> +</div> +</body> +</html> + |