How to use wildcard with files which names start with '-'?

Question

There are some files which names start with '-', such as '-1.png', '-2.png'. I can't operate them with wildcard, because those names are regarded as options:

bash-3.2$ ls *.png
ls: illegal option -- .
usage: ls [-ABCFGHLOPRSTUWabcdefghiklmnopqrstuwx1] [file ...]
bash-3.2$ rm *.png
rm: illegal option -- 1
usage: rm [-f | -i] [-dPRrvW] file ...
       unlink file

How to solve this problem?

Answer 1

Either use

ls -- *.png

or

ls ./*.png

The double dash is a common option in GNU tools to signify the end of options: any subsequent words starting with dash is a plain argument. rm works the same way.