# Search Guard Installation Error

**URL:** <https://forum.search-guard.com/t/search-guard-installation-error/909>\
**Category:** Search Guard\
**Created:** [May 11, 2018, 7:12am UTC](https://forum.search-guard.com/t/search-guard-installation-error/909 "2018-05-11T07:12:25Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![VISHNU\_A.P](https://avatars.discourse-cdn.com/v4/letter/v/b77776/32.png) [@VISHNU\_A.P](https://forum.search-guard.com/u/VISHNU_A.P)\
**Post date:** [May 11, 2018, 7:12am UTC](https://forum.search-guard.com/t/search-guard-installation-error/909/1 "2018-05-11T07:12:25Z")

</div>

Hi Everyone,

I used _ **elasticsearch-plugin install -b file://C:/Users/G102043/Downloads/search-guard-6-6.2.3-22.1.zip** _ command

and getting and java exception given below

Exception in thread “main” java.net.UnknownHostException: C

at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184)

at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)

at java.net.Socket.connect(Socket.java:589)

at java.net.Socket.connect(Socket.java:538)

at sun.net.ftp.impl.FtpClient.doConnect(FtpClient.java:957)

at sun.net.ftp.impl.FtpClient.tryConnect(FtpClient.java:917)

at sun.net.ftp.impl.FtpClient.connect(FtpClient.java:1012)

at sun.net.ftp.impl.FtpClient.connect(FtpClient.java:998)

at sun.net.www.protocol.ftp.FtpURLConnection.connect(FtpURLConnection.java:294)

at sun.net.www.protocol.ftp.FtpURLConnection.getInputStream(FtpURLConnection.java:393)

at org.elasticsearch.plugins.InstallPluginCommand.downloadZip(InstallPluginCommand.java:334)

at org.elasticsearch.plugins.InstallPluginCommand.download(InstallPluginCommand.java:253)

at org.elasticsearch.plugins.InstallPluginCommand.execute(InstallPluginCommand.java:221)

at org.elasticsearch.plugins.InstallPluginCommand.execute(InstallPluginCommand.java:212)

at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86)

at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124)

at org.elasticsearch.cli.MultiCommand.execute(MultiCommand.java:75)

at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124)

at org.elasticsearch.cli.Command.main(Command.java:90)

at org.elasticsearch.plugins.PluginCli.main(PluginCli.java:48)

Using Elastic Search 6.2.3, Windows 10

---

<div class="post-metadata">

**Author:** ![jkressin](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.search-guard.com/jkressin/32/9_2.png) [@jkressin](https://forum.search-guard.com/u/jkressin)\
**Post date:** [May 11, 2018, 9:17am UTC](https://forum.search-guard.com/t/search-guard-installation-error/909/2 "2018-05-11T09:17:45Z")

</div>

You miss a slash in your command:

_ **elasticsearch-plugin install -b file:///C:/Users/G102043/Downloads/search-guard-6-6.2.3-22.1.zip** _

> **···**
>
> On Friday, May 11, 2018 at 9:12:25 AM UTC+2, VISHNU. A.P wrote:
> 
> > Hi Everyone,
> 
> > I used _ **elasticsearch-plugin install -b file://C:/Users/G102043/Downloads/search-guard-6-6.2.3-22.1.zip** _ command
> 
> > 
> 
> > and getting and java exception given below
> 
> > 
> 
> > Exception in thread “main” java.net.UnknownHostException: C
> 
> > at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184)
> 
> > at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
> 
> > at java.net.Socket.connect(Socket.java:589)
> 
> > at java.net.Socket.connect(Socket.java:538)
> 
> > at sun.net.ftp.impl.FtpClient.doConnect(FtpClient.java:957)
> 
> > at sun.net.ftp.impl.FtpClient.tryConnect(FtpClient.java:917)
> 
> > at sun.net.ftp.impl.FtpClient.connect(FtpClient.java:1012)
> 
> > at sun.net.ftp.impl.FtpClient.connect(FtpClient.java:998)
> 
> > at sun.net.www.protocol.ftp.FtpURLConnection.connect(FtpURLConnection.java:294)
> 
> > at sun.net.www.protocol.ftp.FtpURLConnection.getInputStream(FtpURLConnection.java:393)
> 
> > at org.elasticsearch.plugins.InstallPluginCommand.downloadZip(InstallPluginCommand.java:334)
> 
> > at org.elasticsearch.plugins.InstallPluginCommand.download(InstallPluginCommand.java:253)
> 
> > at org.elasticsearch.plugins.InstallPluginCommand.execute(InstallPluginCommand.java:221)
> 
> > at org.elasticsearch.plugins.InstallPluginCommand.execute(InstallPluginCommand.java:212)
> 
> > at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86)
> 
> > at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124)
> 
> > at org.elasticsearch.cli.MultiCommand.execute(MultiCommand.java:75)
> 
> > at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124)
> 
> > at org.elasticsearch.cli.Command.main(Command.java:90)
> 
> > at org.elasticsearch.plugins.PluginCli.main(PluginCli.java:48)
> 
> > 
> 
> > 
> 
> > Using Elastic Search 6.2.3, Windows 10