At once I faced an issue, while created a new account through WHM it was creating frontpage extensions and the image folder under public_html directory by default. Due to which I was not able to install joomla getting the error as :

The installation can not be completed:
- You chose to install in the main directory of the domain temp.****.com, but there are conflicting filenames, therefore we can not proceed. Following filenames already exist in the main directory of the domain temp.****.com (path="/home/****/public_html/temp/").You must manually remove these files before proceeding with auto-installation:
images

Solution : I checked my hosting packages and they were having frontpage extensions installed so I have edited the packages and the issue resolved.

:) 

How to check the version of Joomla! (from files / via ftp)

To check the version of joomla! that you are using on for your website you can simply login to the admin panel and see the version on the top right of the admin panel once you are logged in. However, some times there could be situations when you can’t it that simply, like:

• you cannot/don’t have access to login to the joomla! admin panel
• the admin panel template is edited and doesn’t show the version on the top right

So in that situation, you can simply check the version your joomla! is on your website by browsing through the files on the hard disk or via ftp to this file location:

<joomla! root>/libraries/joomla/version.php

Find and open/edit the file. In the version.php on the above location in your joomla installation, check for this part:

class JVersion
{
/** @var string Product */
var $PRODUCT     = ‘Joomla!’;
/** @var int Main Release Level */
var $RELEASE     = ‘1.5‘;
/** @var string Development Status */
var $DEV_STATUS = ‘Stable’;
/** @var int Sub Release Level */
var $DEV_LEVEL     = ‘15‘;

The release + dev_status is your joomla! current version. Like in this case its 1.5.15