Editing Tutorials/Setting up a server (section)

=== Installing Java ===

Due to performance and crash issue with OpenJDK and ''Minecraft'' server, we will install Oracle JRE made for linux.

Before installing this JRE, you have to install the linux binary compatibility on FreeBSD, you can follow this [http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/linuxemu-lbc-install.html documentation].<br>
Jave requires some information about the proc. You have to mount linprocfs, type:
<syntaxhighlight lang="sh">
kldload linprocfs
mount -t linprocfs linprocfs /compat/linux/proc
</syntaxhighlight>
and add this line to <code>/etc/fstab</code>:
<pre>
linprocfs   /compat/linux/proc   linprocfs   rw   0  0
</pre>

The Oracle JRE has a dependency marked as forbidden and the installation will fail. Go to <code>/usr/ports/textproc/linux-f10-expat2.0.1/</code> and in the Makefile remove the line which starts with <code>FORBIDDEN=</code>.

Next you have to manually get the linux tarball due to licence issue (like `jre-7u65-linux-i586.tar.gz') from java official web site and copy the file to <code>/usr/ports/distfiles</code>.
Then to install the JRE, go to <code>/usr/ports/java/linux-sun-jre17/</code> and run <code>make install distclean</code>.

''Note: The previous version of this part, tested on FreeBSD 9.2 amd64, was explained like this: You may have to set JRE_UPDATE_VERSION variable in your Makefile to the actual number (e.g. 45 like in this example) and run 'make install NO_CHECKSUM=1'.''

Try running <code>java -version</code>. You may end up with a message that it cannot find <code>libjli.so</code>. One way to fix it is to add your java paths to the search explicitly.
Make a symlink:
<syntaxhighlight lang="sh">
ln -s /usr/local/linux-sun-jre1.7.0/lib/i386 /compat/linux/usr/lib/java
</syntaxhighlight>
And in <code>/compat/linux/etc/ld.so.conf.d/java.conf</code> add:
<pre>
/usr/lib/java
/usr/lib/java/jli
</pre>

Run <code>/compat/linux/sbin/ldconfig</code>.
Now <code>java -version</code> should work.