setfattr(1) — Linux manual page


SETFATTR(1)                    File Utilities                    SETFATTR(1)

NAME         top

       setfattr - set extended attributes of filesystem objects

SYNOPSIS         top

       setfattr [-h] -n name [-v value] pathname...
       setfattr [-h] -x name pathname...
       setfattr [-h] --restore=file

DESCRIPTION         top

       The setfattr command associates a new value with an extended
       attribute name for each specified file.

OPTIONS         top

       -n name, --name=name
           Specifies the name of the extended attribute to set.

       -v value, --value=value
           Specifies the new value of the extended attribute. There are
           three methods available for encoding the value.  If the given
           string is enclosed in double quotes, the inner string is treated
           as text. In that case, backslashes and double quotes have special
           meanings and need to be escaped by a preceding backslash. Any
           control characters can be encoded as a backslash followed by
           three digits as its ASCII code in octal. If the given string
           begins with 0x or 0X, it expresses a hexadecimal number. If the
           given string begins with 0s or 0S, base64 encoding is expected.
           Also see the --encoding option of getfattr(1).

       -x name, --remove=name
           Remove the named extended attribute entirely.

       -h, --no-dereference
           Do not follow symlinks.  If pathname is a symbolic link, it is
           not followed, but is instead itself the inode being modified.

           Restores extended attributes from file.  The file must be in the
           format generated by the getfattr command with the --dump option.
           If a dash (-) is given as the file name, setfattr reads from
           standard input.

           Do not decode the attribute value. Can be used to set values
           obtained with getfattr --only-values.

           Print the version of setfattr and exit.

           Print help explaining the command line options.

       --  End of command line options.  All remaining parameters are
           interpreted as file names, even if they start with a dash

EXAMPLES         top

       Add extended attribute to user namespace:

       $ setfattr -n -v bar file.txt

       To add md5sum of the file as an extended attribute:

       # setfattr -n trusted.md5sum -v d41d8cd98f00b204e00998ecf8427e file.txt

AUTHOR         top

       Andreas Gruenbacher, <> and the SGI XFS
       development team, <>.

       Please send your bug reports or comments to
       < > or <acl->.

SEE ALSO         top

       getfattr(1), attr(5)

COLOPHON         top

       This page is part of the attr (manipulating filesystem extended
       attributes) project.  Information about the project can be found at
       ⟨⟩.  If you have a bug report
       for this manual page, see
       ⟨⟩.  This page was ob‐
       tained from the project's upstream Git repository
       ⟨git://⟩ on 2020-11-01.  (At that
       time, the date of the most recent commit that was found in the repos‐
       itory was 2020-10-08.)  If you discover any rendering problems in
       this HTML version of the page, or you believe there is a better or
       more up-to-date source for the page, or you have corrections or im‐
       provements to the information in this COLOPHON (which is not part of
       the original manual page), send a mail to

Dec 2001                     Extended Attributes                 SETFATTR(1)

Pages that refer to this page: attr(1)getfattr(1)fgetxattr(2)flistxattr(2)fremovexattr(2)fsetxattr(2)getxattr(2)lgetxattr(2)listxattr(2)llistxattr(2)lremovexattr(2)lsetxattr(2)removexattr(2)setxattr(2)tmpfiles.d(5)xattr(7)