我正在开发一个 shell 脚本，它会自动安装最新的 Elasticsearch 5.0.0 GA 版本和 X-Pack 插件。
这是我所拥有的：
#!/bin/bash
# ========= ES INSTALL =========
wget -qO - https://packages.elastic.co/GPG-KEY-elasticsearch | sudo apt-key add -
sudo apt-get install apt-transport-https
echo "deb https://artifacts.elastic.co/packages/5.x/apt stable main" | sudo tee -a /etc/apt/sources.list.d/elastic-5.x.list
apt-get update && apt-get install -y elasticsearch
# ===== ES PLUGINS INSTALL =====
yes | ./usr/share/elasticsearch/bin/elasticsearch-plugin install x-pack
在 X-Pack 安装时，我收到以下错误：
Exception in thread "main" java.nio.file.FileAlreadyExistsException: /usr/share/elasticsearch/bin/x-pack
at sun.nio.fs.UnixException.translateToIOException(UnixException.java:88)
at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:102)
at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:107)
at sun.nio.fs.UnixFileSystemProvider.createDirectory(UnixFileSystemProvider.java:384)
at java.nio.file.Files.createDirectory(Files.java:674)
at org.elasticsearch.plugins.InstallPluginCommand.installBin(InstallPluginCommand.java:519)
at org.elasticsearch.plugins.InstallPluginCommand.install(InstallPluginCommand.java:482)
at org.elasticsearch.plugins.InstallPluginCommand.execute(InstallPluginCommand.java:207)
at org.elasticsearch.plugins.InstallPluginCommand.execute(InstallPluginCommand.java:190)
at org.elasticsearch.cli.SettingCommand.execute(SettingCommand.java:54)
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:96)
at org.elasticsearch.cli.MultiCommand.execute(MultiCommand.java:69)
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:96)
at org.elasticsearch.cli.Command.main(Command.java:62)
at org.elasticsearch.plugins.PluginCli.main(PluginCli.java:42)
如果我没有调用 X-Pack 安装命令，yes |那么一切正常。有什么问题yes |？