Linux hidden files are prefixed with a . for example .htaccess would make this a hidden file, by default when you list a directories contents in Linux they are not displayed.
Linux Show Hidden Files Command
Change to the directory you wish to list the hidden files and enter the ls command with the following options:
ls -la (the Linux show hidden files command) should give you an output similar to the following:
1 2 3 4 5 6 7 8 9