This
post will outline the steps required to install Java in Kali Linux 2.0 – Kali
Sana. This post got the same instructions which also applies to Kali Linux 1.x
and it’s still valid. I’ve had other readers confirming the process. Do verify
and if it worked for you, let me know via comments section. I’ve also updated
instructions for latest Java SE Development Kit 7u79 i.e. jdk-7u79-linux-x64.tar.gz,
so you can pretty much copy paste it as long the versions are matching.
Otherwise, replace the version number and you will be fine.
So lets get on with the
installation:
Download
latest Java SE SDK
Note
that I’m using x64 which is 64-bit. 32-bit users should choose their versions accordingly. Not that tough really!
Download
and save the file in /root directory.
Uncompress archive
Now you
uncompress and move the whole uncompressed folder to/opt (optional)
directory.
tar -xzvf /root/jdk-7u79-linux-x64.tar.gz
mv jdk1.7.0_79 /opt
cd /opt/jdk1.7.0_79
Install
and register binaries
This step registers the
downloaded version of Java as an alternative, and switches it to be used as the
default:
update-alternatives --install /usr/bin/java java
/opt/jdk1.7.0_79/bin/java 1
update-alternatives --install /usr/bin/javac javac
/opt/jdk1.7.0_79/bin/javac 1
update-alternatives --install /usr/lib/mozilla/plugins/libjavaplugin.so
mozilla-javaplugin.so /opt/jdk1.7.0_79/jre/lib/amd64/libnpjp2.so 1
update-alternatives --set java /opt/jdk1.7.0_79/bin/java
update-alternatives --set javac /opt/jdk1.7.0_79/bin/javac
update-alternatives --set mozilla-javaplugin.so
/opt/jdk1.7.0_79/jre/lib/amd64/libnpjp2.so
Testing
your installation
First of
all, close your browser and re-open. You won’t believe how many users actually
forgets to do this step and later complains Java ain’t working. I’d advise to
bookmark this site to be able to reopen these instructions quickly, or simply
copy these into a leafpad / vi / text-editor.
To check the version of Java you
are now running
java -version
To check
the browser plugin just click Do I have Java?
This should take you to Oracles
Java website and you will see a confirmation message.
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