为什么“键入哪个”表示“哪个是散列的”?
如果是shell-builtins(例如type本身): $ type type type is a shell builtin $ which type <Doesn't return anything since it's a shell builtin, silently exits> 如果是命令(通常)(例如python): $ type python python is /usr/bin/python $ which python /usr/bin/python 如果是which(位于的命令/usr/bin/which) $ type which which is hashed (/usr/bin/which) $ which which /usr/bin/which 为什么type which这么说呢which is hashed?which散列的意义是什么?它的实际含义是什么?