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<h2 class="title"><a name="install.redhat"></a>1.5. <span class="application">Python</span> on RedHat Linux
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<p>Installing under UNIX-compatible operating systems such as Linux is easy if you're willing to install a binary package. Pre-built
binary packages are available for most popular Linux distributions. Or you can always compile from source.
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<p>Download the latest <span class="application">Python</span> <span class="acronym">RPM</span> by going to <a href="http://www.python.org/ftp/python/">http://www.python.org/ftp/python/</a> and selecting the highest version number listed, then selecting the <tt class="filename">rpms/</tt> directory within that. Then download the <span class="acronym">RPM</span> with the highest version number. You can install it with the <span><b class="command">rpm</b></span> command, as shown here:
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<div class="example"><a name="d0e3510"></a><h3 class="title">Example 1.2. Installing on RedHat Linux 9</h3><pre class="screen">
<tt class="prompt">localhost:~$ </tt><span class="userinput">su -</span>
<tt class="prompt">Password: </tt><span class="userinput">[enter your root password]</span>
<tt class="prompt">[root@localhost root]# </tt><span class="userinput">wget http://python.org/ftp/python/2.3/rpms/redhat-9/python2.3-2.3-5pydotorg.i386.rpm</span>
<span class="computeroutput">Resolving python.org... done.
Connecting to python.org[194.109.137.226]:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 7,495,111 [application/octet-stream]
...</span>
<tt class="prompt">[root@localhost root]# </tt><span class="userinput">rpm -Uvh python2.3-2.3-5pydotorg.i386.rpm</span>
<span class="computeroutput">Preparing... ########################################### [100%]
1:python2.3 ########################################### [100%]</span>
<tt class="prompt">[root@localhost root]# </tt><span class="userinput">python</span> <a name="install.unix.1.1"></a><img src="../images/callouts/1.png" alt="1" border="0" width="12" height="12">
<span class="computeroutput">Python 2.2.2 (#1, Feb 24 2003, 19:13:11)
[GCC 3.2.2 20030222 (Red Hat Linux 3.2.2-4)] on linux2
Type "help", "copyright", "credits", or "license" for more information.</span>
<tt class="prompt">>>> </tt><span class="userinput">[press Ctrl+D to exit]</span>
<tt class="prompt">[root@localhost root]# </tt><span class="userinput">python2.3</span> <a name="install.unix.1.2"></a><img src="../images/callouts/2.png" alt="2" border="0" width="12" height="12">
<span class="computeroutput">Python 2.3 (#1, Sep 12 2003, 10:53:56)
[GCC 3.2.2 20030222 (Red Hat Linux 3.2.2-5)] on linux2
Type "help", "copyright", "credits", or "license" for more information.</span>
<tt class="prompt">>>> </tt><span class="userinput">[press Ctrl+D to exit]</span>
<tt class="prompt">[root@localhost root]# </tt><span class="userinput">which python2.3</span> <a name="install.unix.1.3"></a><img src="../images/callouts/3.png" alt="3" border="0" width="12" height="12">
<span class="computeroutput">/usr/bin/python2.3</span>
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<td valign="top" align="left">Whoops! Just typing <b class="userinput"><tt>python</tt></b> gives you the older version of <span class="application">Python</span> -- the one that was installed by default. That's not the one you want.
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<td valign="top" align="left">At the time of this writing, the newest version is called <b class="userinput"><tt>python2.3</tt></b>. You'll probably want to change the path on the first line of the sample scripts to point to the newer version.
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<td valign="top" align="left">This is the complete path of the newer version of <span class="application">Python</span> that you just installed. Use this on the <tt class="literal">#!</tt> line (the first line of each script) to ensure that scripts are running under the latest version of <span class="application">Python</span>, and be sure to type <b class="userinput"><tt>python2.3</tt></b> to get into the interactive shell.
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