solr安装，无法启动示例(solr installation, cannot start examples)

 第一：我想学习solr。 所以我想从http://lucene.apache.org/solr/quickstart.html执行快速入门教程 
 
 在Ubuntu 14.04 64位我安装solr以下方式： 
 
 在/ opt每wget我采取了最新的版本6.3.0。 这是作为根。 
 
 然后我通过提取服务安装文件 
 
tar xzf solr-6.3.0.tgz solr-6.3.0/bin/install_solr_service.sh --strip-components=2
 
 也由根！ 
 
 我让它运行 
 
sudo ./install_solr_service.sh solr-6.3.0.tgz
 
 导致用户/组solr，启动solr作为服务，从/ opt / solr创建符号链接到/opt/solr-6.3.0，将solr.home作为用户solr作为所有者的/ var / solr。 
 
 Solr按预期启动，因此http：// localhost：8983 / solr /＃/显示浏览器中的破折号。 
 
 我停下来用通常的命令 
 
service solr stop 
 
 该服务启动示例。 
 
 这里的问题是： 
 
 当我以root身份启动时： 
 
root@duke:/opt/solr# bin/solr start -e cloud -noprompt
 
 这里结果如下： 
 
 “欢迎来到SolrCloud的例子！ 
 
 为示例SolrCloud群集启动2个Solr节点。 
 
 Solr主目录/ opt / solr / example / cloud / node1 / solr已经存在。 / opt / solr / example / cloud / node2已经存在。 
 
 使用以下命令启动端口8983上的Solr：/ opt / solr / bin / solr start -cloud -p 8983 -s“/ opt / solr / example / cloud / node1 / solr” 
 
 警告：以root用户身份启动Solr是一种安全风险，不被视为最佳做法。 退出。 请参阅参考指南。 要覆盖此检查，请从参数'-force'开始 
 
 错误：进程退出，出现错误：1（退出值：1）“ 
 
 所以root不是正确的所有者，我理解这是因为创建了一个新的用户solr。 
 
 然后我更改为solr作为用户启动示例： 
 
solr@duke:/opt/solr$ bin/solr start -e cloud -noprompt
 
 “欢迎来到SolrCloud的例子！ 
 
 为示例SolrCloud集群启动2个Solr节点。 
 
 创建Solr主目录/ opt / solr / example / cloud / node1 / solr 
 
 错误：无法创建目标'/ opt / solr / example / cloud / node1 / solr'目录“ 
 
 因此，作为root的第一个测试给我没有权限，因为solr，第二个作为用户solr没有权限创建目录/文件。 
 
 怎么办？ 

First: I want to learn solr. So I want to execute the quickstart tutorial from http://lucene.apache.org/solr/quickstart.html
 
On ubuntu 14.04 64 bit I installed solr the following way:
 
In /opt per wget I took the latest version 6.3.0. This was made as root.
 
Then I extracted the service installation file by
 
tar xzf solr-6.3.0.tgz solr-6.3.0/bin/install_solr_service.sh --strip-components=2
 
Also by root!
 
I let it run by
 
sudo ./install_solr_service.sh solr-6.3.0.tgz
 
that led to user/group solr, started solr as a service, made a symlink from /opt/solr to /opt/solr-6.3.0, made solr.home to /var/solr with user solr as owner etc.
 
Solr is started as expected so http://localhost:8983/solr/#/ shows me the dash in the browser.
 
I stop with the usual command
 
service solr stop 
 
the service to start the examples.
 
And here the problem:
 
When I start as root:
 
root@duke:/opt/solr# bin/solr start -e cloud -noprompt
 
here the results:
 
"Welcome to the SolrCloud example!
 
Starting up 2 Solr nodes for your example SolrCloud cluster.
 
Solr home directory /opt/solr/example/cloud/node1/solr already exists. /opt/solr/example/cloud/node2 already exists.
 
Starting up Solr on port 8983 using command: /opt/solr/bin/solr start -cloud -p 8983 -s "/opt/solr/example/cloud/node1/solr"
 
WARNING: Starting Solr as the root user is a security risk and not considered best practice. Exiting. Please consult the Reference Guide. To override this check, start with argument '-force'
 
ERROR: Process exited with an error: 1 (Exit value: 1)"
 
So root is not the correct owner, which I understand because there is a new user solr created.
 
Then I change to solr as user to start the examples:
 
solr@duke:/opt/solr$ bin/solr start -e cloud -noprompt
 
"Welcome to the SolrCloud example!
 
Starting up 2 Solr nodes for your example SolrCloud cluster.
 
Creating Solr home directory /opt/solr/example/cloud/node1/solr
 
ERROR: Destination '/opt/solr/example/cloud/node1/solr' directory cannot be created"
 
So the first test as root give me no permission because of solr and the second one as user solr give me no permission to create directories/files.
 
What is to do???

原文：https://stackoverflow.com/questions/41638868