[quote=parkourmumbai;207249]
First, I would like to know what the 'execute' permission setting exactly...
You need not set chkmod for PHP scripts. For Perl, you would need to place the *.pl script in you cgi-bin and set it to 755.


Second, what is the difference between the folders 'public_html' and 'www'?
One is a folder and the other is a shortcut.


Third, I am not familiar with Linux file systems, and file paths, they seem to be a bit different from the windows file paths.
When in dount right click the red cross (in place of the image) and check its properties.


Also, when storing my files in different folders, what permissions should I set to the folders and the files so that web visitors cannot access my folders themselves, but can access the files in them? Also, what file paths should I use in the html code?
chkmod 711 should work to bring up a forbiden error for folders.
A better way would be to have a index.html in there with a page that has similar formating to the webpage.


Fourth, I have an ad-free account, which gives my 300 MB of storage space.
Yet, when I go to the upload file page in file manager, it says that the space I have available for uploads is 50 MB only.
Ask about this in the "Free Hosting Forum", but I am sure you have what you signed up for. Check in your cPanel for bandwidth, disk space and usfull stats.