IXwebhosting how to host multiple domains in same space or to make it clear. I have multiple domains a.com and b,com 
how to make sure that both of them points to the same website and give me the same pages. 

Got to ixwebhosting.com
Login using your username and password
-> Click On hosting products
-> Manage
-> Select Main -> Account Settings
-> Click On domainname.com
-> click add in Domain aliases
-> Fill in new domain name and click on submit. 
(WHAT IS DOMAIN ALIASES )
Each domain name can have aliases - secondary names that refer to the primary i. e. original domain. For instance if your web site is called company.com, you can have an alias company.net point to company.com.
Click the Add icon to add a new alias to the domain name.
Click either the alias name link or the Edit icon to view/change your alias settings.
Click the Trash Can icon to delete the alias.