In the windows operating system, the file path delimiter is a backslash ( "\\"), for example: E: \\ hsta \\ pdf (to prevent escape herein, it should be rewritten two backslash)
However linux operating system, a file delimiter is a slash ( "/"), for example: / opt / auto_test
But can not avoid dealing with the linux operating system in the daily development, the reason is very clear, that is because most of its customers have the security of web applications are deployed in linux environment!