CHMOD is the linux / unix command for changing the security / privacy settings of files and folders.
The command structure for changing the security settings is:
chmod [settings] <<filename>>
The settings are 3 sets of numbers of value 0-7
The first set is for permissions for the owner of the file / folder
The second sets the permissions for the user's group and
The third sets the permissions for everyone else.
The values of the permissions are added together to give the 0-7 value.
4 = read
2 = write
1 = execute
so if you wanted to give everybody read, write and execute permissions your command would be:
chmod 777 <<filename>>
if you wanted to have full access to your file / folder, but only allow other people to read it your command would be:
chmod 744 <<filename>>
Anon.
If you need anymore help just ask.
Oh and if it's a windows box that you're using, just right click the file / folder, go to properties and go to security or permissions (I forget the tag) and then tick the relevant checkboxes for owner, group, public