Cesium – How to make an InfoBox pop up on demand ?


Cesium – How to show tooltip in cesium ?


How do I find ElasticSearch path to install plugins?

This is for new ElasticSearch user.

If you have installed elastic search and unable to install plugins, here are the easy steps.

1. Type this command


Locate your home directory ( Look for Settings -> Path -> Home for value )
2. Go to Location (Example on the picture above)

How to test –

Open this URL


If you see this, your plugin is working.

similarly, you can install other plugins –

About BigDesk Plugin phpmind-elasticsearch-bigdesk-plugin

How to test – http://localhost:9200/_plugin/bigdesk/


kopf is a simple web administration tool for elasticsearch written in JavaScript + AngularJS + jQuery + Twitter bootstrap

How to install –

<pre>sudo bin/plugin install https://github.com/lukas-vlcek/bigdesk/archive/master.zip</pre>



How to test –  http://localhost:9200/_plugin/kopf


About  koph 


How to access external data from Kibana Plugin?


To make AJAX call from Kibana Visualization to external web service.

There are two separate headers that are necessary here: access-control-allow-origin and access-control-allow-headers. You’re currently setting access-control-allow-origin but I don’t see anywhere you’re setting access-control-allow-headers.


How to make download file forcefully and securely ?

Warning – Be careful with this script i have modified this just for me but you can use it anyways.


How protect files using php and .htaccess ?


You can secure any file using this script.
It will not allow you to access without username and password.

1st step is to create .htaccess file in a folder which you want to protected.
2nd step is add index.php as shown in example. This will not work as it is but you can modify.


How to use PHP to output an mp4 video ?

I want my videos URL to keep hidden from the users while still, they can able to see the video. 

It have 2 parts.

1. PHP code and
2. HTML video Code


How to uninstall Elasticsearch and Kibana



(1) Remove previous versions of ElasticSearch:

(2) Remove the ElasticSearch directories:

(3) Install ElasticSearch 1.6:

(4) Start the service:

(5) Test if it works:


Remove Kibana

Things you can use to resolve this situation:

  1. reinstalling and then removing
  2. single remove without purge
  3. force installing and removing
  4. force removing by dpkg

How do I determine the total size of a directory (folder) from the command line?

The command du “summarizes disk usage of each FILE, recursively for directories,” e.g.,

How to find the path of the local git repository when I am possibly in a sub-directory?

How do I remove a folder?

Be sure the folder is really empty (hidden files/folders might be in there). Look at the file contents again with

If you’re absolutely certain that it doesn’t contain anything you want to have (including subdirectories), delete it with

The -r makes it delete the folder (and subfolders), even if it is non-empty, -f is for force (this might be unnecessary).

How to know elastic search installed version from kibana?

/opt/kibana/bin/kibana --version


How to rotate flight marker towards arrival airport in leaflet ?



First it is important to know how it works –

    1. Check out Leaflet Rotated Marker  plugin https://github.com/bbecquet/Leaflet.RotatedMarker

rotationAngle property need a value and this is key. You will have to generate that dynamically based on aircraft position and destination airport.  Function below does the same calculate  and give rotationAngle.

Function in Python

Keep in mind that lat1 and long1 are the aircraft’s position. And lat2, long2 are airport destination where aircraft is heading.


Function in PHP

Function in JavaScript