Suppose you find that you have a file with a special character and you want to delete it:

$ ls -badfile.txt PrintHood reg57.txt Favorites Recent scripts $ rm -badfile.txt rm: invalid option -- 'b' Try 'rm ./-badfile.txt' to remove the file '-badfile.txt'. Try 'rm --help' for more information. $ ls *.txt ls: invalid option -- 'e' Try 'ls --help' for more information.