Module/theme installation error I couldn't installed new modules/theme, when i try to install it asks for FTP request for server. Here I spell out what I did,

At first, Update manager module was not enabled. As I couldn't find "install new module" link in the module page, I enabled the update manager module. Now, I got "install new module". The problem starts here: In the module's page, it shows some warnings. 


  fileowner()[function.fileowner]:stat failed for temporary




When I tried to install a new module (on click "install new module"), it shows warnings as follows. 



I found Installing modules without FTP, but I couldn't resolve my issue.
I don't have the write permissions for the directory /admin/config/media/file-system. So, I got to change the write permissions to files directory that appears in /sites/default path
- change permissions from dwrx-rx-x to dwrx-wrx-wrx 

If every thing goes well, you will no longer see the warning. Now, you are ready to install the new modules/themes.