Rails Permission denied @ dir_s_mkdir

We need to grant permission to access the required directory for the system root user

sudo chmod 777 -R your_project_directory_to_be_access

In your case you can use:

sudo chmod 777 -R /var/www/noise/public

For security reasons, just keep in your mind:

chmod 777 gives everybody read, write and execute rights which for most problems is definitively too much.

CodeHunter