Linux command to get current value of java.io.tmpdir

unix properties command system
mujeeb picture mujeeb · Apr 10, 2012 · Viewed 57k times · Source

I need a Linux command to get current value of java.io.tmpdir Also can you tell me the command to get all the system propeties.

Answer

Tomasz Szymulewski picture Tomasz Szymulewski · Mar 7, 2014

JDK provides tools with which you can achieve your goal. Using the specified command, you can display the value of a system variable java.io.tmpdir.

jinfo <process id> | grep "java.io.tmpdir"

The <process id> is the number of the java process for which you want to display the value of the system variable. Id of the java process you can get by using the jps tool, which list all java processes running on your machine.

To see all system variables of the java process, please use this command

 jinfo <process id>

All JDK tools are located in $JAVA_HOME/bin directory.

java.io.tmpdir is one of java system properties, so its value exists only inside jvm. To find out what is the value of java.io.tmpdir property you can also write a simple program in java. It may look something like this piece of code:

public class JSystemProperties {
    public static void main(String[] args) {
        System.getProperties().list(System.out);
    }
}

The code above will print all java system properties, but you can modify this to print only one system property with name you pass through args array (using System.getProperty(key) method). After you compile this class you can create script (which will run compiled java class) that can be treated as Linux command to get current values of java system properties.

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