Sir,
I want to post a new thread but I am not able to find a new thread link anywhere in the home page.
Every time i used to go to new post and selecting contact administrator after that there is a link for new thread is it the right method.
You will not find a 'New Thread' link in the home page. Instead, you should go to one of the sub-forums in http://www.unix.com/forum_index.php and then click on the 'New Thread' link.