If the first character of file name is printable but neither alphanumeric nor whitespace you use [[:punct:]] glob operator:

$ ls *.txt f1.txt f2.txt ♫abc.txt $ ls [[:punct:]]* ♫abc.txt 

If the first character of file name is printable but neither alphanumeric nor whitespace you can use [[:punct:]] glob operator:

$ ls *.txt f1.txt f2.txt ♫abc.txt $ ls [[:punct:]]*.txt ♫abc.txt