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一.安裝Java
sudo apt-add-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install openjdk-8-jre-headless

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驗證
java -version

安裝JDK
sudo apt-get install openjdk-8-jdk-headless

驗證
javac

JAVA HOME /usr/lib/jvm/java-8-oracle
JAVA CLASSPATH /usr/share/java

export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64
export CLASSPATH=/usr/share/java
source /etc/profile

二.安裝ES
wget -qO - https://artifacts.elastic.co/GPG-KEY-elasticsearch | sudo apt-key add -

sudo apt-get install apt-transport-https

echo "deb https://artifacts.elastic.co/packages/7.x/apt stable main" | sudo tee -a /etc/apt/sources.list.d/elastic-7.x.list

sudo apt-get update

sudo apt-get install elasticsearch

ps -p 1

sudo /bin/systemctl daemon-reload
sudo /bin/systemctl enable elasticsearch.service
sudo systemctl start elasticsearch.service

//sudo systemctl stop elasticsearch.service
//sudo systemctl status elasticsearch.service

驗證
curl localhost:9200

三.安裝ik
sudo /usr/share/elasticsearch/bin/elasticsearch-plugin install https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v7.4.1/elasticsearch-analysis-ik-7.4.1.zip

重啟
sudo systemctl stop elasticsearch.service
sudo systemctl start elasticsearch.service

驗證
curl 'http://127.0.0.1:9200/_analyze?pretty=true' -H 'Content-Type: application/json' -d '{ "analyzer":"ik_max_word", "text":"士大夫敢死隊風格MN"}'

當前名稱：Ubuntu16.04的ElasticSearch的實踐
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