1、下載安裝包：
2、常見錯誤及解決方案：
2.1、[unknown] uncaught exception in thread [main]org.elasticsearch.bootstrap.StartupException: java.lang.RuntimeException: can not run elasticsearch as root
切換用戶為普通用戶：
sudo aibaiyang
2.1、Exception in thread "main" java.nio.file.AccessDeniedException: /usr/local/software/elasticsearch-6.8.3/config/jvm.options
切換到root賬號：
su
給aibaiyang賬號賦予elasticsearch-6.8.3 文件夾權限：
chown -R aibaiyang:aibaiyang /usr/local/software/elasticsearch-6.8.3