1.Search Guard（安全认证）

切换到elasticsearch目录，通过使用elasticsearch plugin命令安装Search Guard插件

./bin/elasticsearch-plugin install -b com.floragunn:search-guard-6:<version>

参数参考: https://github.com/floragunncom/search-guard/wiki

例：./bin/elasticsearch-plugin install -b com.floragunn:search-guard-6:6.6.2-24.2

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2. IK分词器

切换到elasticsearch目录，通过使用elasticsearch plugin命令安装IK插件

./bin/elasticsearch-plugin install https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v<version>/elasticsearch-analysis-ik-<version>.zip

参数参考: https://github.com/medcl/elasticsearch-analysis-ik/releases

例：./bin/elasticsearch-plugin install https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v6.6.2/elasticsearch-analysis-ik-6.6.2.zip

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