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‎Slide/basiclinuxcommands.html

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<link rel="stylesheet" href="css/reveal.css">
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<link rel="stylesheet" href="css/theme/black.css" id="theme">
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<link rel="stylesheet" href="css/basiclinux.css">
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<!-- Code syntax highlighting -->
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<link rel="stylesheet" href="lib/css/zenburn.css">
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<h2>
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Basic Linux Commands
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</h2>
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<p><small>Created by: Aashish Satyajith</small></p>
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</section>
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<section>
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<h2>
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Introduction: What is Unix?
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Introduction: What is Linux?
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</h2>
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<ul>
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<li>An operating system</li>
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<li>Developed at AT&T Bell Labs in the 1960’s</li>
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<li>Developed at AT&amp;T Bell Labs in the 1960’s</li>
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<li>Command Line Interpreter</li>
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<li>GUIs (Window systems) are now available</li>
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</ul>
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</section>
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<section>
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<section id="aash_code">
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<h2>
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Introduction: Unix vs. Linux
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</h2>
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<ul>
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<li>Unix was the predecessor of Linux</li>
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<li>Linux is a variant of Unix</li>
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<li>So is Mac OS X, so much of this tutorial applies to Macs as well</li>
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<li>Linux is open source</li> </ul>
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</section>
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<section>
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<h2>
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Introduction: Why Unix/Linux?
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Introduction: Why Unix/Linux?
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</h2>
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<ul>
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<li>Linux is free</li>
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</h2>
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<ul>
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<li>The shell interprets commands the user types and manages their execution</li>
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<li>The shell communicates with the internal part of the operating system called the kernel</li>
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<li>The most popular shells are: tcsh, csh, korn, and bash</li>
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<li>For this tutorial, we are using bash</li>
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</ul>
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<h2>
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Help!
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</h2>
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Whenever you need help with a command type “man” and the command name </section>
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Whenever you need help with a command type <code><font color="green">man</font></code> followed by the command name
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</section>
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<section>
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<h1>FILE SYSTEM COMMANDS</h1>
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</section>
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<section>
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<h2>
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Command: pwd
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pwd
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</h2>
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To find your current path use “pwd”
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<p>
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To find your current path use “pwd”
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</p>
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<p>
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Syntax: <code><font color="green">pwd</font></code>
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</p>
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</section>
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<section>
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<h2>
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Command: cd filename
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cd
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</h2>
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<p>To change to a specific directory use “cd”</p>
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<p>To change to a specific directory use cd command</p>
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<p>
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Syntax: <code><font color="green">cd</font><font color="yellow"> &lt;filename&gt;</font></code>
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</p>
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<ul>
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<li> “~” is the location of your home directory</li>
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<li>“..” is the location of the directory below current one</li>
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</ul>
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</section>
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<section>
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<h2>
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Command: ls
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ls
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</h2>
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To list the files in the current directory use “ls”
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<p>
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Syntax: <code><font color="green">ls</font></code>
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</p>
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</section>
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<section>
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<h3>
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<section>
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<h3>Options can be combined:</h3>
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<ul>
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<li>Command: ls -ltr</li>
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<li>Command: <code><font color="green">ls</font><font color="yellow"> -ltr</font></code></li>
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</ul>
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<p>List files by time in reverse order with long listing</p>
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</section>
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</section>
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<section>
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<h2>
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Command: mkdir
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mkdir
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</h2>
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<p>
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To create a new directory use “mkdir”
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To create a new directory use mkdir
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</p>
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<p>
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Syntax: <code><font color="green">mkdir</font><font color="yellow"> &lt;dirname&gt;</font></code>
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</p>
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</section>
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<section>
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<h2>
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Command: rmdir
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rmdir
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</h2>
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<p>
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To remove and empty directory use “rmdir”
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</p>
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<p>
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Syntax: <code><font color="green">rmdir</font><font color="yellow"> &lt;dirname&gt;</font></code>
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</p>
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</section>
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<section>
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<h1>
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</section>
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<section>
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<h2>
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Command: cat
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cat
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</h2>
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<p>
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Dumps an entire file to standard output
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</p>
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<p>
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Syntax: <code><font color="green">cat</font><font color="yellow"> &lt;filename&gt;</font></code>
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</p>
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</section>
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<section>
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<h2>
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Command: less
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less
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</h2>
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<p>
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“less” displays a file, allowing forward/backward movement within it
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</p>
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<p>
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Syntax: <code><font color="green">less</font><font color="yellow"> &lt;filename&gt;</font></code>
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</p>
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<p>
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<ul>
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<li>return scrolls forward one line, space one page</li>
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</section>
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<h2>
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Command: head
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head
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<p>
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“head” displays the top part of a file
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</p>
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<p>
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Syntax: <code><font color="green">head</font><font color="yellow"> &lt;filename&gt;</font></code>
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</p>
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<ul>
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<li>return scrolls forward one line, space one page</li>
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<li>y scrolls back one line, b one page</li>
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</section>
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<section>
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<h2>
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Command: tail
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tail
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Same as head, but shows the last lines
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</p>
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<p>
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Syntax: <code><font color="green">tail</font><font color="yellow"> &lt;filename&gt;</font></code>
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</p>
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</section>
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</section>
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<section>
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<h2>
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Command: cp source destination
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cp
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</h2>
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<p>
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Copies a file from source to destination
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</p>
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<p>
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Syntax: <code><font color="green">cp</font><font color="yellow"> &lt;source&gt; &lt;destination&gt;</font></code>
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</p>
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</section>
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<section>
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<h2>
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Command: mv source destination
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mv
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<p>
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To move a file to a different location use “mv”
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</p>
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<p>
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Syntax: <code><font color="green">command</font><font color="yellow"> &lt;source&gt; &lt;destination&gt;</font></code>
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</p>
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<p>
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<li>mv can also be used to rename a file</li>
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</section>
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<h2>
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Command: rm filename
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rm
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</h2>
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To remove a file use “rm”
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</p>
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<p>
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Syntax: <code><font color="green">command</font><font color="yellow"> &lt;filename&gt;</font></code>
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</p>
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<ul>
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<li>To remove a file “recursively”: rm –r</li>
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<li>Used to remove all files and directories </li>
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</section>
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<section>
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<h2>
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Command: chmod
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chmod
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If you own the file, you can change its permissions with “chmod”
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Syntax: chmod [user/group/others/all]+[permission] [file(s)]
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</p>
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</section>
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<h1>PROCESS COMMANDS</h1>
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</section>
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<section>
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Command: ps
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</h2>
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<p>
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To view the processes that you’re running
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</p>
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</section>
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<section>
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<h2>
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Command: top
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</h2>
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To view the CPU usage of all processes
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</p>
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</section>
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<section>
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<h2>
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Command: kill
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</h2>
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<p>
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To terminate a process use “kill”
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</p>
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<p>
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Syntax: <code><font color="green">chmod</font><font color="yellow"> &lt;[user/group/others/all]+[permission] [file(s)]&gt;</font></code>
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</p>
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</section>
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<section>
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<h2>
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Command: wc
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wc
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<p>
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To count the characters, words, and lines in a file use “wc”
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<p>
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Syntax: <code><font color="green">command</font><font color="yellow"> &lt;filename&gt;</font></code>
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</p>
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<p>
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The first column in the output is lines, the second is words, and the last is characters
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</p>

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