There's a bit more to it than the selection of a utility to view files/directories ...
Linux/Unix implements a system of permissions for every file (including directories, device nodes, etc.). What you can "see" depends upon who you are (i.e., who you have logged in as), the group(s) to which you belong, and the permissions set on the file(s) you wish to view. As root, you have no restrictions; you can view, modify and generally muck about with anything that strikes your fancy. As a normal user (non-root), you are restricted by the permissions associated with each file, which specify the access rights for the owner, group-members and everyone else. The ls -l command will show you the persmissions associated with a particular file (unless it is a directory, in which case you will see the permissions associated with all files in the directory). The chmod man page (use man chmod to display) has some good info on the basic concepts.
Also, not sure what you mean by the "Linux directory", but before I launch into some long-winded explanation that turns out to be wide of the mark, I'll wait for clarification.
Hope this helps.
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