Unix Inode 0: A Forgotten Corner

This article explores the limitations of inode numbers in early Unix systems and the special case of inode 0. The author found that while the POSIX standard doesn't explicitly prohibit the use of inode 0, many systems and programs may rely on non-zero inode numbers in practice. Using inode 0 may lead to unexpected behavior, as some programs might interpret it as a 'no such file' signal. While experimenting with inode 0 is possible using user-space filesystems, it's not recommended due to potential compatibility issues and unpredictable results.