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The relationship between execute permission on a directory and its inode structure

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http://unix.stackexchange.com – My question deals with the relationship between the read and execute bits on a directory. I'm going to give my assumptions, first, all according to my current knowledge, then ask my question in bold in the context of those assumptions. Please feel free to correct any incorrect assumptions: Files and directories both are stored using inodes. Files and directories both have permissions (let's just focus on the rwx bits, forgetting the sticky, setuid, setguid (unless they're relevant)). The contents of a directory's inode's data blocks store a mapping of file names to inode numbers. Read permis (HowTos)