ls .*
ls myfile.*[code]
That would match any file or directory that starts with "myfile." and has any characters afterwards.
So it would match "myfile.mp3", "myfile.ogg", "myfile.c", "myfile.h", "myfile.py", "myfile.jpg" and even just plain old "myfile." (assuming you had files with those names!)
And if you wanted to list all files of a particular type (e.g. .mp3) you would switch the pattern around to this:
[code]
ls *.mp3
ls /.*
ls | grep 'V.*s'