If no value is supplied for who, each permission bit specified in perm, for which the corresponding bit in the file mode creation mask is User, group and other mode bits are cleared. = The mode bits specified by the who value are cleared, or, if no who value is specified, the Otherwise, the mode specified who and perm values are cleared. Otherwise, mode for who and permision values are set. If no value is supplied for permission, + has no effect. + If no value is supplied for who, permission is set. O others not owner! s set-user-ID-on-execution and set-group-ID-on-execution bits. X e Xecute/search if the file is a directory or any of the execute/search flags are X e xecutable for file searchable for directory Where who is user, group, other (not owner) and Group members, read and execute by others, and no set-uid or set-gid behaviour is 755

This feature: see chmod(2) and the suiddir option to mount(8).Įxecutable with this bit set will run with effective gid set to the gid of the file owner.ġ000 sticky bit See chmod(2) and sticky(8).įor example, the absolute mode that permits read, write and execute by the owner, read and execute by Owner and not by the uid of the creating process, if the underlying file system supports

Will force all files and sub-directories created in them to be owned by the directory Modes Absolute which is the octal sum of:Įxecutable with this bit set will run withĮffective uid set to the uid of the file owner. Only the owner of a file or the super-user is permitted to change the mode of a file.Įxits 0 on success 1 if cannot access target or syntax is incorrect. Specified more than once, the old and new modes of the file will also be displayed, v -v verbose showing filenames as the mode is modified. h change the mode of the link itself rather than the target. Symbolic links encountered in the tree traversal are not followed by default. H symbolic links on the command line are followed.

H, -L and -P are ignored without -R, override each other and the results are the last specified. R Recursively change the modes of the file hierarchies rooted in files. f force (?)Do not display a message if modify fails for file. Modifies the file mode bits and Access Control Lists (ACLs) Chmod Mac OS chmod change mode read write xecute and Access Control List (ACL) features too _ _ _Ĭhmod linux chmod change file modes or Access Control Lists (ACL)Ĭhmod mode file …Ĭhmod ACE file …Ĭhmod file …

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