For example, I want all the files in /home/trusktr/Downloads/ to remain hidden from other users, except for one.I tried chmod 777 /home/trusktr/Downloads/someFile.avi but someFile.avi is still invisible to other users.How do I make only someFile.avi visible to all users?RELEVANT INFO PERHAPS:    [21:48:25/starlancer/trusktr/~] ls -ld /home/trusktrdrwx------ 80 trusktr users 4096 Jan  9 21:29 /home/trusktr/[21:48:34/starlancer/trusktr/~] ls -ld /home/trusktr/Downloadsdrwxr-xr-x 8 trusktr users 4096 Jan  9 20:57 /home/trusktr/Downloads/[21:48:43/starlancer/trusktr/~] ls -l /home/trusktr/Downloads/someFile.avi -rwxrwxrwx 1 trusktr users 2575522316 Jan  9 20:40 /home/trusktr/Downloads/someFile.avi*
How do I give global access to a file in a private folder?
filesystems;files
The drwx------ on your home directory is preventing other users from traversing it, i.e. seeing the Downloads folder and its contents.  You can let others through to see files they know the path to but prevent them from listing your files with --x perms, so you'll want to chmod 711 /home/trusktr, and check that other files and directories in there have appropriate permissions.