Issue with setting up permissions on my linux server.

Hi..This is Snehal. I have some problem changing permissions for my folders on my server operating in linux. I have my wordpress website on it and when I tried to upload a theme, its giving me the following error " The uploaded file could not be moved to wp-content/uploads."

I think there's some problem with regards to permissions. Currently the 'wp-content' directory has a permission mentioned below.
drwxr-xr-x 5 root root 4096 Dec 28 05:21 wp-content

I'm not familiar with the linux commands and how it works. Please help me with this.