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. is not a variable with a value. It is a (special) file in the filesystem. You cannot change it.


1

The Debian openjdk packages are marked Multi-Arch: same so you should be able to do: sudo dpkg --add-architecture i386 sudo apt-get update sudo apt-get install icedtea-6-plugin You might need to remove the amd64 version of the browser plugin first, but you can have both versions of java itself installed at the same time.


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Since this question is RPM specific, rpm is the way to get started (as answered by @Matteo). rpm flags -q is short for --query -l is short for --list Example rpm -ql jdk1.8.0_20 | grep "jdk1.8.0_20/bin$" /usr/java/jdk1.8.0_20/bin Knowing this may be desirable for setting a user or application's $JAVA_HOME variable. This is often needed when a ...


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I am sorry but you should really read each and every line of the output log to understand why the error happened. This is the error line: javac: invalid target release: 1.8 It means you do not have a JDK for Java version 1.8, I would suggest googling this error, that way you would for example see this other answer.



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