How do I deal with a filename that starts with the hyphen (-) character?
You can refer to it either using ./-filename or some command will allow you to put it after double dash:
linux
How to open a “-” dashed filename using terminal?
This type of approach has a lot of misunderstanding because using – as an argument refers to STDIN/STDOUT i.e dev/stdin or dev/stdout .So if you want to open this type of file you have to specify the full location of the file such as ./- .For eg. , if you want to see what is in that file use cat ./-