Editing Ext2 (section)

===Inodes===
Every file or directory is represented by an [[inode]]. The term "inode" comes from "index node" (over time, it became i-node and then inode).<ref>"Programmer's Journal", Volume 5, 1987, p. 174</ref> The inode includes data about the size, permission, ownership, and location on disk of the file or directory.

Example of ext2 inode structure:

<div align="center">[[File:Ext2-inode.svg|Estructure]]</div>

Quote from the Linux kernel documentation for ext2:<ref>{{Cite web |title=The Second Extended File System |url=https://www.nongnu.org/ext2-doc/ext2.html |access-date=2019-12-11 |website=www.nongnu.org}}</ref>
{{blockquote|There are pointers to the first 12 blocks which contain the file's data in the inode.  There is a pointer to an indirect block (which contains pointers to the next set of blocks), a pointer to a doubly indirect block and a pointer to a trebly indirect block.}}

Thus, there is a structure in ext2 that has 15 pointers. Pointers 1 to 12 point to direct blocks, pointer 13 points to an indirect block, pointer 14 points to a doubly indirect block, and pointer 15 points to a triply indirect block.