Elasticsearch7.1中文文档-第一章-入门

安装openjdk 

wget --no-cookies --no-check-certificate --header "Cookie: oraclelicense=accept-securebackup-cookie" 
https://download.java.net/java/GA/jdk10/10.0.2/19aef61b38124481863b1413dce1855f/13/openjdk-10.0.2_linux-x64_bin.tar.gz

2.解压到/usr/local下

tar zxf openjdk-10.0.2_linux-x64_bin.tar.gz -C /usr/local

3.将目录换名（也可以不换）

mv /usr/local/jdk-10.0.2 /usr/local/jdk-10

修改方法三:

通过修改profile文件:

vim /etc/profile

/export PATH //找到设置PATH的行，添加

export PATH=/usr/local/mongodb/bin:$PATH

生效方法：系统重启

有效期限：永久有效

用户局限：对所有用户

vim /etc/profile

在最底部添加jdk的路径
export PATH=PATH:/usr/local/jdk10/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin
保存，重启服务器
reboot

查看java版本
java -version
openjdk version "10.0.2" 2018-07-17
OpenJDK Runtime Environment (build 10.0.2+13-Ubuntu-1ubuntu0.18.04.4)
OpenJDK 64-Bit Server VM (build 10.0.2+13-Ubuntu-1ubuntu0.18.04.4, mixed mode)

如果把PATH玩坏了用以下操作
1、在命令行中 输入export PATH=/usr/bin:/usr/sbin:/bin:/sbin

（export还能用）

2、然后将path改正确

下载安装包gz

root@ubuntu:~# wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.5.4.tar.gz
root@ubuntu:~# tar -xvf elasticsearch-6.5.4.tar.gz

解压完成将在当前目录中创建一组文件和文件夹，然后我们进入bin目录。

root@ubuntu:~# cd elasticsearch-6.5.4/bin
root@ubuntu:~/elasticsearch-6.5.4/bin# bash elasticsearch
OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.
[2019-01-09T10:43:22,092][WARN ][o.e.b.ElasticsearchUncaughtExceptionHandler] [unknown] 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-6.5.4.jar:6.5.4]
	at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:127) ~[elasticsearch-6.5.4.jar:6.5.4]
	at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~[elasticsearch-6.5.4.jar:6.5.4]
	at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) ~[elasticsearch-cli-6.5.4.jar:6.5.4]
	at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-cli-6.5.4.jar:6.5.4]
	at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:93) ~[elasticsearch-6.5.4.jar:6.5.4]
	at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:86) ~[elasticsearch-6.5.4.jar:6.5.4]
Caused by: java.lang.RuntimeException: can not run elasticsearch as root
	at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:103) ~[elasticsearch-6.5.4.jar:6.5.4]
	at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:170) ~[elasticsearch-6.5.4.jar:6.5.4]
	at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:333) ~[elasticsearch-6.5.4.jar:6.5.4]
	at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:136) ~[elasticsearch-6.5.4.jar:6.5.4]
	... 6 more

 报错很明显“can not run elasticsearch as root”，所以切换到普通用户重新来吧。

 

文件夹权限不够，修改权限
解决方法： chown -R 用户名:用户名  文件（目录）名