How to set JAVA_HOME in Linux for all users

by
  1. find /usr/lib/jvm/java-1.x.x-openjdk

  2. vim /etc/profile

    Prepend sudo if logged in as not-privileged user, ie. sudo vim

  3. Press ‘i’ to get in insert mode

  4. add:

    export JAVA_HOME="path that you found"

export PATH=$JAVA_HOME/bin:$PATH
  5. logout and login again, reboot, or use source /etc/profile to apply changes immediately in your current shell

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