WordPress ask ftp login details when upgrade ?

WordPress ask ftp login details when upgrade ?
Problem : When you have try to upgrade your wordpress blog or plugins then wordpress ask the ftp login details, you enter the correct ftp login details but it still not updated.
Solution : You are facing this problem because your domain is hosted on non-suexec server. There are 2 solution for this issue
1) You need to migrate your account to suexec enable server
or
2) Set the ownership nobody.nobody to  all wordpress related files.  But is  unsecured for your account. Your account is easily hacked due the nobody.nobody ownership.
Thanks