delete — 参见 unlink() 或 unset()
这是个虚构的手册条目来给那些本来是找 unlink() 或者
Thank you for creating this dummy item. It helped me!
Unlink refers to the underlying UNIX command, unlink, which removes the symbolic or hard link to the file, not necessarily the file itself. The file is only removed when all links to the file are removed.