An Inode number is a number that is related to the file and unique across all file systems in Linux and Unix.
A number that is associated with the file and unique in that particular filesytem.
Explanation:
Whenever any files are created on the system, It is given a file name with a number (inode)is unique. To access this file on the system, the user usually will use the file name. But here, he or she will have to access the file along with an Inode number associated with it.
Where stored as numbers datatype in a table called the Inode table. The Inode table is created only when the file system is created. It shows how many inodes are filled and how many are free. The command “df-i” shows the inode table in Linux
