Install OpenJDK 8

sudo apt install openjdk-8-jdk

Verify the Java installation by running the following command which will print the Java version:

java -version

The output should look something like this:

openjdk version "1.8.0_191"
OpenJDK Runtime Environment (build 1.8.0_191-8u191-b12-2ubuntu0.18.04.1-b12)
OpenJDK 64-Bit Server VM (build 25.191-b12, mixed mode)

Java is installed

JVM home

/usr/share/elasticsearch/jdk

Uninstall OpenJDK 8

step 1:take a look at installed OpenJDK packages

sudo dpkg --list | grep -i jdk

output

ii  openjdk-8-jdk:amd64                   8u292-b10-0ubuntu1~18.04                        amd64        OpenJDK Development Kit (JDK)
ii  openjdk-8-jdk-headless:amd64          8u292-b10-0ubuntu1~18.04                        amd64        OpenJDK Development Kit (JDK) (headless)
ii  openjdk-8-jre:amd64                   8u292-b10-0ubuntu1~18.04                        amd64        OpenJDK Java runtime, using Hotspot JIT
ii  openjdk-8-jre-headless:amd64          8u292-b10-0ubuntu1~18.04                        amd64        OpenJDK Java runtime, using Hotspot JIT (headless

step 2:

sudo apt-get remove --purge icedtea-* openjdk-*

Installation methods of Elasticsearch Server

https://www.elastic.co/guide/index.html

https://www.elastic.co/docs/deploy-manage/deploy/self-managed/installing-elasticsearch#installation-methods -> all Installation methods on all kind of

https://www.elastic.co/docs/deploy-manage/deploy/self-managed/installing-elasticsearch

Configure

Install IK

https://release.infinilabs.com/analysis-ik/stable/

https://www.iaspnetcore.com/blogpost-671c29410dde369ec2e3a923-elasticsearch-on-ubuntu-install-ik-analysis-for-elasticsearch-8x-on-ubuntu#mcetoc_1ib7in18414

Uninstall Elasticsearch

https://www.iaspnetcore.com/Blog/BlogPost/5e0cae0c2328b1510a080155/how-to-install-and-uninstall-reinstall-elasticsearch-7x-on-ubuntu-1804aliyun#mcetoc_1gp8mbf071f

Elasticsearch .Net clients

Elasticsearch clients

https://www.elastic.co/docs/reference/elasticsearch-clients/ -> all clients

Elasticsearch .Net Client

https://www.elastic.co/docs/reference/elasticsearch/clients/dotnet -> .Net Client

.Net Document

https://www.elastic.co/docs/reference/elasticsearch/clients/dotnet/examples -> .Net Client

https://www.elastic.co/docs/reference/elasticsearch/clients/dotnet/examples

https://github.com/elastic/elasticsearch-net

How To Install and uninstall reinstall OpenJDK on Ubuntu 18.04（aliyun）

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