The names of files and subdirectories can be displayed with the ls (list) command. Typing ls lists the files and subdirectories located in the working directory that don't begin with a ``.''. To see all the names, use the all flag, i.e. ls -a.
Other interesting flags for the ls command are:
-F Marks directories with a trailing slash and executable files with
a trailing asterisk.
-l Lists in long format. Gives all sorts of information.
-R Recursively lists subdirectories encountered.
-s Gives the size of each file.
-t Sorts by time modified instead of by name.
It is possible to limit the scope of the files and subdirectories
by using the wildcard characters discussed in section [*].
For example, I would type
ls q*
if I wanted to list all the files and subdirectories
that began with a q.
Note that the ls command lists files in the working directory only, unless you include the pathname to another directory whose filenames you want to list.