hadoop -version java version "1.8.0_161" Java(TM) SE Runtime Environment (build 1.8.0_161-b12) Java HotSpot(TM) 64-Bit Server VM (build 25.161-b12, mixed mode) Step 6 - Configure Hadoop Now we are ready to configure the most important part - Hadoop configurations which involves Core, YARN, MapReduce, HDFS configurations. Here is the command line for installing in silent mode: .exe is the single executable installer for the Java Runtime Environment (JRE); /L, if used, sets the localized language for the installer (see , if used, is either jrecore [,extra] [,other_US], if used, indicates that the Plug-in should be registered with the Internet I am trying get the latest JRE installed in windows using dir command. I Have JRE 1.6 and 1.8 installed on my Windows but I need to get whatever the latest version installed in windows (even in future it may change to 1.8 to 2.0*). Can any one please help on this. The wildcard only matches JARs, not class files; to get all classes in a directory, just end the classpath entry at the directory name. The above two options can be combined to include all JAR and class files in a directory, and the usual classpath precedence rules apply. E.g. -cp /classes;/jars/*. The argument files can also contain the main class name and all options. If an argument file contains all of the options required by the java command, then the command line could simply be: java @argfile. See java Command-Line Argument Files for a description and examples of using @-argfiles. Extra Options for Java Command-Line Installation This section describes the command-line options for the JRE Windows Offline Installer. Run the installer as follows: jre [INSTALLCFG=configuration_file_path] [options] jre refers to the JRE Windows Offline Installer base file name (for example, jre-8u05-windows-i586.exe ). Java is typically installed (on Windows) as C:\Program Files\Java\jdk That installation directory has a subdirectory bin which you need to append to your PATH environment variable via the control panel. Then, the commands like java, javac etc. will be available on the command line. BTW, the same is true for Grails. The easiest option for installing Java is using the version packaged with Ubuntu. Specifically, this will install OpenJDK 8, the latest and recommended version. First, update the package index. sudo apt-get update. Next, install Java. Specifically, this command will install the Java Runtime Environment (JRE). sudo apt-get install default-jre. .

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