Can I use
.htaccess file for redirecting and other things in SharePoint 2010 site?
If Yes, tell me how.
If No, Please advice me.
Sharepoint runs on Windows not apache, so doesn't use htaccess. .hta files are not supported by sharepoint.
There are other ways to redirecting like following:
You can install and use the URL rewrite module for IIS, which is an extension for IIS Server version >7.
Here are some articles about how to use it and create rewrite rules: