[root@Hadoop config]# cd..
-bash: cd..: command not found
[root@Hadoop config]# cd ..
[root@Hadoop elasticsearch-6.4.3]# ls
bin config lib LICENSE.txt logs modules NOTICE.txt plugins README.textile
[root@Hadoop elasticsearch-6.4.3]# cd bin
[root@Hadoop bin]# ls
elasticsearch elasticsearch-cli.bat elasticsearch-migrate elasticsearch-service-mgr.exe elasticsearch-syskeygen x-pack-env
elasticsearch.bat elasticsearch-croneval elasticsearch-migrate.bat elasticsearch-service-x64.exe elasticsearch-syskeygen.bat x-pack-env.bat
elasticsearch-certgen elasticsearch-croneval.bat elasticsearch-plugin elasticsearch-setup-passwords elasticsearch-translog x-pack-security-env
elasticsearch-certgen.bat elasticsearch-env elasticsearch-plugin.bat elasticsearch-setup-passwords.bat elasticsearch-translog.bat x-pack-security-env.bat
elasticsearch-certutil elasticsearch-env.bat elasticsearch-saml-metadata elasticsearch-sql-cli elasticsearch-users x-pack-watcher-env
elasticsearch-certutil.bat elasticsearch-keystore elasticsearch-saml-metadata.bat elasticsearch-sql-cli-6.4.3.jar elasticsearch-users.bat x-pack-watcher-env.bat
elasticsearch-cli elasticsearch-keystore.bat elasticsearch-service.bat elasticsearch-sql-cli.bat x-pack
[root@Hadoop bin]# ./elasticsearch
[2020-02-27T03:17:44,388][WARN ][o.e.b.ElasticsearchUncaughtExceptionHandler] [] uncaught exception in thread [main]
org.elasticsearch.bootstrap.StartupException: java.lang.RuntimeException: can not run elasticsearch as root
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:140) ~[elasticsearch-6.4.3.jar:6.4.3]
at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:127) ~[elasticsearch-6.4.3.jar:6.4.3]
at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~[elasticsearch-6.4.3.jar:6.4.3]
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) ~[elasticsearch-cli-6.4.3.jar:6.4.3]
at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-cli-6.4.3.jar:6.4.3]
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:93) ~[elasticsearch-6.4.3.jar:6.4.3]
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:86) ~[elasticsearch-6.4.3.jar:6.4.3]
Caused by: java.lang.RuntimeException: can not run elasticsearch as root
at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:104) ~[elasticsearch-6.4.3.jar:6.4.3]
at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:171) ~[elasticsearch-6.4.3.jar:6.4.3]
at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:326) ~[elasticsearch-6.4.3.jar:6.4.3]
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:136) ~[elasticsearch-6.4.3.jar:6.4.3]
... 6 more
[root@Hadoop bin]#
[root@Hadoop bin]#
不能使用root 用户
