What is used to identify each file in the linux file system

What is used to identify each file in the Linux file system?

Each file in the Linux file system is identified by an index node.

Linux file system uses index nodes to record file information, which is similar to the file allocation table of Windows. The index node is a data structure that contains the file name, location, size, creation or modification time of a file. , file control information such as access permissions and ownership relationships. A file system maintains an array of index nodes. Each file or directory corresponds to a unique element in the index node array. The system assigns an array to each index node. The number, which is the index number of the node in the array, is called the index node number.

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