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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 | <html><head><title>System Information Commands</title><link rel="stylesheet" type="text/css" href="help:/common/kde-default.css"><link rel="stylesheet" type="text/css" href="help:/common/kde-docs.css"><link rel="stylesheet" type="text/css" href="help:/common/kde-localised.css"><link rel="stylesheet" type="text/css" href="help:/common/kubuntu.css"><meta name="generator" content="DocBook XSL Stylesheets V1.76.1"><link rel="home" href="index.html" title="Introduction To The Command Line"><link rel="up" href="index.html" title="Introduction To The Command Line"><link rel="prev" href="files-directories.html" title="File and Directory Commands"><link rel="next" href="elevated-privileges.html" title="Executing Commands with Elevated Privileges"><link rel="copyright" href="legal.html" title="Credits and License"><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><meta name="GENERATOR" content="KDE XSL Stylesheet V1.14 using libxslt"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div id="content"><div id="header"><div id="header_content"><div id="header_left"><div id="header_right"><img src="help:/common/top-kde.jpg" width="36" height="34"> System Information Commands</div></div></div></div><div class="navCenter"><table class="navigation"><tr><td class="prevCell"><a accesskey="p" href="files-directories.html">Prev</a></td><td class="upCell"> </td><td class="nextCell"><a accesskey="n" href="elevated-privileges.html">Next</a></td></tr></table></div><div id="contentBody"><div class="sect1"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="sysinfo"></a>System Information Commands</h2></div></div></div><div class="sect2"><div class="titlepage"><div><div><h3 class="title"><a name="df"></a>df - display amount of disk space</h3></div></div></div><p>
The <span xmlns:doc="http://nwalsh.com/xsl/documentation/1.0" class="command"><span class="command"><strong>df</strong></span></span> command displays filesystem disk space usage for all
partitions. (<acronym class="acronym">df</acronym> stands for <span class="quote">“<span class="quote">disk free</span>”</span>).
</p><pre class="screen">df -h</pre><p> will give information using megabytes
(<abbr class="abbrev">M</abbr>) and gigabytes (<abbr class="abbrev">G</abbr>) instead of blocks
(<span xmlns:doc="http://nwalsh.com/xsl/documentation/1.0" class="command"><span class="command"><strong>-h</strong></span></span> means <span class="quote">“<span class="quote">human readable</span>”</span>).
</p></div><div class="sect2"><div class="titlepage"><div><div><h3 class="title"><a name="free"></a>free - display amount of free and used memory</h3></div></div></div><p>
The <span xmlns:doc="http://nwalsh.com/xsl/documentation/1.0" class="command"><span class="command"><strong>free</strong></span></span> command displays the amount of free and used memory
in the system. </p><pre class="screen">free -m</pre><p> will give the information using
megabytes, which is probably the most useful for current computers.
</p></div><div class="sect2"><div class="titlepage"><div><div><h3 class="title"><a name="top"></a>top - display top consuming processes</h3></div></div></div><p>
The <span xmlns:doc="http://nwalsh.com/xsl/documentation/1.0" class="command"><span class="command"><strong>top</strong></span></span> command displays information on the
<span class="trademark">Linux</span>™ system - processes that are running, system
resources including <acronym class="acronym">CPU</acronym>, <acronym class="acronym">RAM</acronym> & swap
usage, and the total number of tasks being run. To exit <span xmlns:doc="http://nwalsh.com/xsl/documentation/1.0" class="command"><span class="command"><strong>top</strong></span></span>,
press <span class="keycap"><strong>q</strong></span>.
</p></div><div class="sect2"><div class="titlepage"><div><div><h3 class="title"><a name="uname"></a>uname - print details about the current machine</h3></div></div></div><p>
The <span xmlns:doc="http://nwalsh.com/xsl/documentation/1.0" class="command"><span class="command"><strong>uname</strong></span></span> command with the <span xmlns:doc="http://nwalsh.com/xsl/documentation/1.0" class="command"><span class="command"><strong>-a</strong></span></span> option
displays all system information, including machine name, kernel name &
version, and other details. This command is useful for checking which kernel is
in use. (<abbr class="abbrev">uname</abbr> is short for <span class="quote">“<span class="quote">unix name</span>”</span>).
</p></div><div class="sect2"><div class="titlepage"><div><div><h3 class="title"><a name="lsb_release"></a>lsb_release - print details about current Linux release</h3></div></div></div><p>
The <span xmlns:doc="http://nwalsh.com/xsl/documentation/1.0" class="command"><span class="command"><strong>lsb_release</strong></span></span> with the <span xmlns:doc="http://nwalsh.com/xsl/documentation/1.0" class="command"><span class="command"><strong>-a</strong></span></span> option prints
version information for the <span class="trademark">Linux</span>™ release in use. For
example, typing: </p><pre class="screen">lsb_release -a</pre><p> will display:
</p><pre class="screen">No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 12.04
Release: 12.04
Codename: precise
</pre><p>
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