In shell scripting, what does .[!.]* mean?

Question

A command that prints a list of files and folders in the current directory along with their total sizes is du -sh *. That command alone doesn\'t, however, list

Answer 1

. - match a ., prefix of hidden file

[!.] - match any character, as long as it is not a ., see ref

* - any number of characters

so this pattern means match files starts with . but not ..