diff options
Diffstat (limited to '.html/java/install/ubuntu.html')
| -rw-r--r-- | .html/java/install/ubuntu.html | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/.html/java/install/ubuntu.html b/.html/java/install/ubuntu.html new file mode 100644 index 0000000..0d81292 --- /dev/null +++ b/.html/java/install/ubuntu.html @@ -0,0 +1,158 @@ +<!DOCTYPE html> +<html> +<head> + <title> + The Codex » + Installing Java on Ubuntu + </title> + + <link + rel='stylesheet' + type='text/css' + href='http://fonts.googleapis.com/css?family=Buenard:400,700&subset=latin,latin-ext'> + <link + rel="stylesheet" + type="text/css" + href="../../media/css/reset.css"> + <link + rel="stylesheet" + type="text/css" + href="../../media/css/grimoire.css"> +</head> +<body> + +<div id="shell"> + + <ol id="breadcrumbs"> + + <li class="crumb-0 not-last"> + + <a href="../../">index</a> + + </li> + + <li class="crumb-1 not-last"> + + <a href="../">java</a> + + </li> + + <li class="crumb-2 not-last"> + + <a href="./">install</a> + + </li> + + <li class="crumb-3 last"> + + ubuntu + + </li> + + </ol> + + + + <div id="article"> + <h1 id="installing-java-on-ubuntu">Installing Java on Ubuntu</h1> +<p>Accurate as of: Java 7, Ubuntu 12.04. The instructions below assume an amd64 +(64-bit) installation. If you're still using a 32-bit OS, work out the +differences yourself.</p> +<h2 id="via-package-management-apt">Via Package Management (Apt)</h2> +<p>OpenJDK 7 is available via apt by default.</p> +<p>To install the JDK:</p> +<pre><code>sudo aptitude update +sudo aptitude install openjdk-7-jdk +</code></pre> +<p>To install the JRE only (without the JDK):</p> +<pre><code>sudo aptitude update +sudo aptitude install openjdk-7-jre +</code></pre> +<p>To install the JRE without GUI support (appropriate for headless servers):</p> +<pre><code>sudo aptitude update +sudo aptitude install openjdk-7-jre-headless +</code></pre> +<p>(You can also use <code>apt-get</code> instead of <code>aptitude</code>.)</p> +<p>These packages interact with <a href="http://manpages.ubuntu.com/manpages/hardy/man8/update-alternatives.8.html">the <code>alternatives</code> +system</a>, +and have <a href="http://manpages.ubuntu.com/manpages/hardy/man8/update-java-alternatives.8.html">a dedicated <code>alternatives</code> manager +script</a>. +The <code>alternatives</code> system affects <code>/usr/bin/java</code>, <code>/usr/bin/javac</code>, and +browser plugins for applets and Java Web Start applications for browsers +installed via package management. It also affects the symlinks under +<code>/etc/alternatives</code> related to Java.</p> +<p>To list Java versions available, with at least one Java version installed via +Apt:</p> +<pre><code>update-java-alternatives --list +</code></pre> +<p>To switch to <code>java-1.7.0-openjdk-amd64</code> for all Java invocations:</p> +<pre><code>update-java-alternatives --set java-1.7.0-openjdk-amd64 +</code></pre> +<p>The value should be taken from the first column of the <code>--list</code> output.</p> +<h3 id="tool-support">Tool support</h3> +<p>Most modern Java tools will pick up the installed JDK via <code>$PATH</code> and do not +need the <code>JAVA_HOME</code> environment variable set explicitly. For applications old +enough not to be able to detect the JDK, you can set <code>JAVA_HOME</code> to +<code>/usr/lib/jvm/java-1.7.0-openjdk-amd64</code>.</p> +<h2 id="by-hand">By Hand</h2> +<p>The <a href="http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html">Java SE Development Kit +7</a> +tarballs can be installed by hand. Download the “Linux x64” <code>.tar.gz</code> version, +then unpack it in <code>/opt</code>:</p> +<pre><code>cd /opt +tar xzf ~/jdk-7u45-linux-x64.tar.gz +</code></pre> +<p>This will create a directory named <code>/opt/jdk1.7.0_45</code> (actual version number +may vary) containing a ready-to-use Java dev kit.</p> +<p>You will need to add the JDK's <code>bin</code> directory to <code>PATH</code> if you want commands +like <code>javac</code> and <code>java</code> to work without fully-qualifying the directory:</p> +<pre><code>cat > /etc/profile.d/oracle_jdk <<'ORACLE_JDK' +PATH="${PATH}:/opt/jdk1.7.0_45/bin" +export PATH +ORACLE_JDK +</code></pre> +<p>(This will not affect non-interactive use; setting PATH for non-interactive +programs like build servers is beyond the scope of this document. Learn to use +your OS.)</p> +<p>Installation this way does <em>not</em> interact with the alternatives system (but +you can set that up by hand if you need to).</p> +<p>For tools that cannot autodetect the JDK via <code>PATH</code>, you may need to set +<code>JAVA_HOME</code> to <code>/opt/jdk1.7.0_45</code>.</p> + </div> + + + +<div id="comments"> +<div id="disqus_thread"></div> +<script type="text/javascript"> + /* * * CONFIGURATION VARIABLES: EDIT BEFORE PASTING INTO YOUR WEBPAGE * * */ + var disqus_shortname = 'grimoire'; // required: replace example with your forum shortname + + /* * * DON'T EDIT BELOW THIS LINE * * */ + (function() { + var dsq = document.createElement('script'); dsq.type = 'text/javascript'; dsq.async = true; + dsq.src = 'http://' + disqus_shortname + '.disqus.com/embed.js'; + (document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(dsq); + })(); +</script> +<noscript>Please enable JavaScript to view the <a href="http://disqus.com/?ref_noscript">comments powered by Disqus.</a></noscript> +<a href="http://disqus.com" class="dsq-brlink">comments powered by <span class="logo-disqus">Disqus</span></a> +</div> + + + + <div id="footer"> + <p> + + The Codex — + + Powered by <a href="http://markdoc.org/">Markdoc</a>. + +<a href="https://bitbucket.org/ojacobson/grimoire.ca/src/master/wiki/java/install/ubuntu.md">See this page on Bitbucket</a> (<a href="https://bitbucket.org/ojacobson/grimoire.ca/history-node/master/wiki/java/install/ubuntu.md">history</a>). + + </p> + </div> + +</div> +</body> +</html>
\ No newline at end of file |