The commands are,
add-apt-repository -y ppa:webupd8team/java apt-get -y update apt-get install -y oracle-java8-installer
The 3rd command threw bellow error.
Reading package lists... Done Building dependency tree Reading state information... Done Package oracle-java8-installer is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package 'oracle-java8-installer' has no installation candidate
After some search I found out from here that the Java is no longer free.
Question: Should I purchase Java License if I want to use/install ElasticSearch?