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Mon Apr 25 13:37:00 UTC 2011 Slackware 13.37 x86_64 stable is released! Thanks to everyone who pitched in on this release: the Slackware team, the folks producing upstream code, and linuxquestions.org for providing a great forum for collaboration and testing. The ISOs are off to be replicated, a 6 CD-ROM 32-bit set and a dual-sided 32-bit/64-bit x86/x86_64 DVD. Please consider supporting the Slackware project by picking up a copy from store.slackware.com. We're taking pre-orders now, and offer a discount if you sign up for a subscription. As always, thanks to the Slackware community for testing, suggestions, and feedback. :-) Have fun!
275 lines
9.9 KiB
HTML
275 lines
9.9 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta name="generator" content="HTML Tidy, see www.w3.org" />
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<title>Handling Files and Directories</title>
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<meta name="GENERATOR" content="Modular DocBook HTML Stylesheet Version 1.7" />
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<link rel="HOME" title="Slackware Linux Essentials" href="index.html" />
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<link rel="NEXT" title="Pagers: more, less, and most" href="file-commands-pagers.html" />
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<link rel="STYLESHEET" type="text/css" href="docbook.css" />
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
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</head>
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<body class="CHAPTER" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#840084"
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alink="#0000FF">
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<div class="NAVHEADER">
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<table summary="Header navigation table" width="100%" border="0" cellpadding="0"
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cellspacing="0">
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<tr>
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<th colspan="3" align="center">Slackware Linux Essentials</th>
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</tr>
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<tr>
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<td width="10%" align="left" valign="bottom"><a href="filesystem-structure-nfs.html"
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accesskey="P">Prev</a></td>
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<td width="80%" align="center" valign="bottom"></td>
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<td width="10%" align="right" valign="bottom"><a href="file-commands-pagers.html"
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accesskey="N">Next</a></td>
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</tr>
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</table>
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<hr align="LEFT" width="100%" />
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</div>
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<div class="CHAPTER">
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<h1><a id="FILE-COMMANDS" name="FILE-COMMANDS"></a>Chapter 10 Handling Files and
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Directories</h1>
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<div class="TOC">
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<dl>
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<dt><b>Table of Contents</b></dt>
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<dt>10.1 <a href="file-commands.html#FILE-COMMANDS-NAVIGATION">Navigation : <tt
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class="COMMAND">ls</tt>, <tt class="COMMAND">cd</tt>, and <tt
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class="COMMAND">pwd</tt></a></dt>
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<dt>10.2 <a href="file-commands-pagers.html">Pagers: <tt class="COMMAND">more</tt>, <tt
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class="COMMAND">less</tt>, and <tt class="COMMAND">most</tt></a></dt>
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<dt>10.3 <a href="file-commands-output.html">Simple Output: <tt class="COMMAND">cat</tt>
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and <tt class="COMMAND">echo</tt></a></dt>
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<dt>10.4 <a href="file-commands-creation.html">Creation: <tt class="COMMAND">touch</tt>
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and <tt class="COMMAND">mkdir</tt></a></dt>
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<dt>10.5 <a href="file-commands-copymove.html">Copy and Move</a></dt>
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<dt>10.6 <a href="file-commands-deletion.html">Deletion: <tt class="COMMAND">rm</tt> and
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<tt class="COMMAND">rmdir</tt></a></dt>
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<dt>10.7 <a href="file-commands-link.html">Aliasing files with <tt
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class="COMMAND">ln</tt></a></dt>
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</dl>
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</div>
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<p>Linux aims to the most Unix-like it can be. Traditionally, Unix operating systems have
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been command-line oriented. We do have a graphical user interface in Slackware, but the
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command-line is still the main level of control for the system. Therefore, it is
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important to understand some of the basic file management commands.</p>
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<p>The following sections explain the common file management commands and provide
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examples of how they are used. There are many other commands, but these will help you get
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started. Also, the commands are only briefly discussed here. You will find more detail in
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the accompanying man pages for each command.</p>
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<div class="SECT1">
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<h1 class="SECT1"><a id="FILE-COMMANDS-NAVIGATION" name="FILE-COMMANDS-NAVIGATION">10.1
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Navigation : <tt class="COMMAND">ls</tt>, <tt class="COMMAND">cd</tt>, and <tt
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class="COMMAND">pwd</tt></a></h1>
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<div class="SECT2">
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<h2 class="SECT2"><a id="AEN3398" name="AEN3398">10.1.1 <tt
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class="COMMAND">ls</tt></a></h2>
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<p>This command lists files in a directory. Windows and DOS users will notice its
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similarity to the <tt class="COMMAND">dir</tt> command. By itself, <tt
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class="COMMAND">ls</tt>(1) will list the files in the current directory. To see what's in
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your root directory, you could issue these commands:</p>
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<table border="0" bgcolor="#E0E0E0" width="100%">
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<tr>
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<td>
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<pre class="SCREEN">
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<samp class="PROMPT">%</samp> <kbd class="USERINPUT">cd /</kbd>
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<samp class="PROMPT">%</samp> <kbd class="USERINPUT">ls</kbd>
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bin cdr dev home lost+found proc sbin tmp var
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boot cdrom etc lib mnt root suncd usr vmlinuz
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</pre>
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</td>
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</tr>
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</table>
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<p>The problem a lot of people have with that output is that you cannot easily tell what
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is a directory and what is a file. Some users prefer that <tt class="COMMAND">ls</tt> add
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a type identifier to each listing, like this:</p>
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<table border="0" bgcolor="#E0E0E0" width="100%">
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<tr>
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<td>
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<pre class="SCREEN">
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<samp class="PROMPT">%</samp> <kbd class="USERINPUT">ls -FC</kbd>
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bin/ cdr/ dev/ home/ lost+found/ proc/ sbin/ tmp/ var/
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boot/ cdrom/ etc/ lib/ mnt/ root/ suncd/ usr/ vmlinuz
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</pre>
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</td>
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</tr>
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</table>
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<p>Directories get a slash at the end of the name, executable files get an asterisk at
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the end of the name, and so on.</p>
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<p><tt class="COMMAND">ls</tt> can also be used to get other statistics on files. For
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example, to see the creation dates, owners, and permissions, you would look at a long
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listing:</p>
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<table border="0" bgcolor="#E0E0E0" width="100%">
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<tr>
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<td>
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<pre class="SCREEN">
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<samp class="PROMPT">%</samp> <kbd class="USERINPUT">ls -l</kbd>
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drwxr-xr-x 2 root bin 4096 May 7 09:11 bin/
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drwxr-xr-x 2 root root 4096 Feb 24 03:55 boot/
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drwxr-xr-x 2 root root 4096 Feb 18 01:10 cdr/
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drwxr-xr-x 14 root root 6144 Oct 23 18:37 cdrom/
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drwxr-xr-x 4 root root 28672 Mar 5 18:01 dev/
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drwxr-xr-x 10 root root 4096 Mar 8 03:32 etc/
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drwxr-xr-x 8 root root 4096 Mar 8 03:31 home/
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drwxr-xr-x 3 root root 4096 Jan 23 21:29 lib/
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drwxr-xr-x 2 root root 16384 Nov 1 08:53 lost+found/
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drwxr-xr-x 2 root root 4096 Oct 6 12:47 mnt/
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dr-xr-xr-x 62 root root 0 Mar 4 15:32 proc/
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drwxr-x--x 12 root root 4096 Feb 26 02:06 root/
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drwxr-xr-x 2 root bin 4096 Feb 17 02:02 sbin/
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drwxr-xr-x 5 root root 2048 Oct 25 10:51 suncd/
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drwxrwxrwt 4 root root 487424 Mar 7 20:42 tmp/
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drwxr-xr-x 21 root root 4096 Aug 24 03:04 usr/
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drwxr-xr-x 18 root root 4096 Mar 8 03:32 var/
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</pre>
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</td>
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</tr>
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</table>
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<p>Suppose you want to get a listing of the hidden files in the current directory. This
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command will do just that:</p>
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<table border="0" bgcolor="#E0E0E0" width="100%">
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<tr>
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<td>
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<pre class="SCREEN">
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<samp class="PROMPT">%</samp> <kbd class="USERINPUT">ls -a</kbd>
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. bin cdrom home mnt sbin usr
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.. boot dev lib proc suncd var
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.pwrchute_tmp cdr etc lost+found root tmp vmlinuz
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</pre>
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</td>
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</tr>
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</table>
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<p>Files beginning with a period (called dot files) are hidden when you run <tt
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class="COMMAND">ls</tt>. You will only see them if you pass the <var
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class="OPTION">-a</var> option.</p>
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<p>There are many more options that can be found in the online manual page. Don't forget
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that you can combine options that you pass to <tt class="COMMAND">ls</tt>.</p>
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</div>
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<div class="SECT2">
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<h2 class="SECT2"><a id="AEN3436" name="AEN3436">10.1.2 <tt
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class="COMMAND">cd</tt></a></h2>
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<p>The <tt class="COMMAND">cd</tt> command is used to change working directories. You
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simply type <tt class="COMMAND">cd</tt> followed by the path name to change to. Here are
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some examples:</p>
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<table border="0" bgcolor="#E0E0E0" width="100%">
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<tr>
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<td>
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<pre class="SCREEN">
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darkstar:~$ <kbd class="USERINPUT">cd /bin</kbd>
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darkstar:/bin$ <kbd class="USERINPUT">cd usr</kbd>
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bash: cd: usr: No such file or directory
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darkstar:/bin$ <kbd class="USERINPUT">cd /usr</kbd>
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darkstar:/usr$ <kbd class="USERINPUT">ls</kbd>
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bin
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darkstar:/usr$ <kbd class="USERINPUT">cd bin</kbd>
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darkstar:/usr/bin$
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</pre>
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</td>
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</tr>
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</table>
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<p>Notice that without the preceding slash, it tries to change to a directory in the
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current directory. Also executing <tt class="COMMAND">cd</tt> with no options will move
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you to your home directory.</p>
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<p>The <tt class="COMMAND">cd</tt> command is not like the other commands. It is a
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builtin shell command. Shell builtins are discussed in <a
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href="shell-bash.html#SHELL-BASH-ENVIRONMENT">Section 8.3.1</a>. This may not make any
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sense to you right now. Basically it means there is no man page for this command.
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Instead, you have to use the shell help. Like this:</p>
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<table border="0" bgcolor="#E0E0E0" width="100%">
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<tr>
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<td>
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<pre class="SCREEN">
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<samp class="PROMPT">%</samp> <kbd class="USERINPUT">help cd</kbd>
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</pre>
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</td>
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</tr>
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</table>
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<p>It will display the options for <tt class="COMMAND">cd</tt> and how to use them.</p>
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</div>
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<div class="SECT2">
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<h2 class="SECT2"><a id="AEN3463" name="AEN3463">10.1.3 <tt
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class="COMMAND">pwd</tt></a></h2>
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<p>The <tt class="COMMAND">pwd</tt> command is used to show your current location. To use
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the <tt class="COMMAND">pwd</tt> command just type <tt class="COMMAND">pwd</tt>. For
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example:</p>
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<table border="0" bgcolor="#E0E0E0" width="100%">
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<tr>
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<td>
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<pre class="SCREEN">
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<samp class="PROMPT">%</samp> <kbd class="USERINPUT">cd /bin</kbd>
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<samp class="PROMPT">%</samp> <kbd class="USERINPUT">pwd</kbd>
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/bin
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<samp class="PROMPT">%</samp> <kbd class="USERINPUT">cd /usr</kbd>
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<samp class="PROMPT">%</samp> <kbd class="USERINPUT">cd bin</kbd>
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<samp class="PROMPT">%</samp> <kbd class="USERINPUT">pwd</kbd>
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/usr/bin
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</pre>
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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 class="NAVFOOTER">
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<hr align="LEFT" width="100%" />
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cellspacing="0">
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<td width="33%" align="left" valign="top"><a href="filesystem-structure-nfs.html"
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accesskey="P">Prev</a></td>
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<td width="34%" align="center" valign="top"><a href="index.html"
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accesskey="H">Home</a></td>
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<td width="33%" align="right" valign="top"><a href="file-commands-pagers.html"
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accesskey="N">Next</a></td>
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<tr>
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<td width="33%" align="left" valign="top">NFS Mounts</td>
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<td width="34%" align="center" valign="top"> </td>
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<td width="33%" align="right" valign="top">Pagers: <tt class="COMMAND">more</tt>, <tt
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class="COMMAND">less</tt>, and <tt class="COMMAND">most</tt></td>
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</tr>
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</table>
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</div>
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</body>
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</html>
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