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Linuxers shows you how to get the Inode utilization data of a filesystem using df command



When we talk about a file in ex2/3/4 filesystems, it consists of two kinds of information - filename and inode. The latter is a special data structure to store information about the file - file type, size, ownership, access information(read,write,execute bits), location of the file content etc. Such type of information is also known as metadata.
  How to: Get the Inode utilization data of a filesystem using df command