shell(3)

-rw-r--r--              Access rights to the file.The first character indicated the type of file.

                            a leading dash means a regular file, while a 'd' indicates a directory.

                            the next three characters are the access rights for the file's owner,

                            the next three are for members of the file's group, and the final three

                            are for everyone else.

 

file:

          the file command to determine a file's type.

less:

        the less command is a program to view test files.

        command                          action

             b                                scroll back one page

             space                        scroll forward one page

            uparrow                      scroll up one line

            G                                 Move to the end of the test file