ElasticSearch now provides a Debian repository that makes it much easier to install it and keep it updated. See:

http://www.elasticsearch.org/blog/apt-and-yum-repositories/

The basic install instructions are to install their key with:

wget -O - http://packages.elasticsearch.org/GPG-KEY-elasticsearch | apt-key add 

Then, create a new file "/etc/apt/sources.list.d/elasticsearch.list" containing:

deb http://packages.elasticsearch.org/elasticsearch/1.0/debian stable main

Then run:

apt-get update

apt-get install elasticsearch

Thanks Andrew, where you say "to install their key with:" Do I need to replace the first command where it says

wget -O - http://packages.elasticsearch.org/GPG-KEY-elasticsearch | apt-key add

With

wget -O - http://packages.elasticsearch.org/ACTUAL-KEY-I-DOWNLOADED | apt-key add

?

If so do I need to include the initial "-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v2.0.14 (GNU/Linux....... rest of key"

Like, literally copy the contents of the whole public key you can download here:

http://packages.elasticsearch.org/GPG-KEY-elasticsearch

Again apologies if this is ever so simple.

Just run the command as it is. It downloads the key on its own.

The "wget" command downloads the key from the url provided. The " | " is called a pipe. It passes the results of the "wget" command to what comes after it, in this case the "apt-key add" command. Try just running:

wget -O - http://packages.elasticsearch.org/GPG-KEY-elasticsearch

You'll see that it prints to the terminal the contents of the downloaded file. So when you add the second part, those contents are "piped" to the "apt-key add" command.

I hope that's clear. You might want to check out:

https://www.digitalocean.com/community/articles/an-introduction-to-linux-i-o-redirection

@Andrew SB

Thanks Andrew, I seem to have it working. My Putty is showing it's connected.

Jonny