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chown(1)

chown(1)                         User Commands                        chown(1)



NAME
       chown - change file ownership

SYNOPSIS
   /usr/bin/chown
       chown [-c | -changes] [--dereference] [ -h | --no-dereference]
            [--from=CURRENT_OWNER:CURRENT_GROUP] [-f | --silent | --quiet]
            [--help] [-R | --recursive] [--no-preserve-root] [--preserve-root]
            [-v | --verbose] owner[:group] file...


       chown -R | -recursive [-c | -changes] [--dereference]
            [ -h | --no-dereference] [--from=CURRENT_OWNER:CURRENT_GROUP]
            [-f | --silent | --quiet] [--help] [-H | -L | -P]
            [--preserve-root] [--no-preserve-root] [-v | --verbose]
             owner[:group] file...


       chown [-c | -changes] [--dereference] [ -h | --no-dereference]
            [--from=CURRENT_OWNER:CURRENT_GROUP] [-f | --silent | --quiet]
            [--help] [-R | --recursive] [--no-preserve-root] [--preserve-root]
            [-v | --verbose] --reference=RFILE | -s ownersid[:groupsid] file ...


       chown -R | -recursive [-c | -changes] [--dereference]
            [ -h | --no-dereference] [--from=CURRENT_OWNER:CURRENT_GROUP]
            [-f | --silent | --quiet] [--help] [-H | -L | -P]
            [--preserve-root] [--no-preserve-root] [-v | --verbose]
            --reference=RFILE | -s ownersid[:groupsid] file ...

   /usr/xpg4/bin/chown
       /usr/xpg4/bin/chown [-fhR] owner[:group] file...


       /usr/xpg4/bin/chown -s [-fhR] ownersid[:groupsid] file...


       /usr/xpg4/bin/chown -R [-f] [-H | -L | -P] owner[:group] file...


       /usr/xpg4/bin/chown -s -R [-f] [-H | -L | -P] ownersid[:groupsid] file...

DESCRIPTION
   /usr/bin/chown and /usr/xpg4/bin/chown
       The  chown  utility  sets the user ID of the file named by each file to
       the user ID specified by owner, and, optionally, sets the group  ID  to
       that specified by group.


       If  chown  is invoked by other than the super-user, the set-user-ID bit
       is cleared.


       Only the owner of a file (or the super-user) can change  the  owner  of
       that file.


       The  file  system has a mountpoint option, rstchown, to restrict owner‐
       ship changes. When this option is in effect the owner of  the  file  is
       prevented  from  changing the owner ID of the file. Only the super-user
       can arbitrarily change owner IDs, whether or  not  this  option  is  in
       effect.


       chown  changes the ownership of each file to owner. owner can be speci‐
       fied as either a user name or a numeric user id. The group ownership of
       each  file can also be changed to group by appending :group to the user
       name.

OPTIONS
       The following options are supported for /usr/bin/chown:

       -c, --changes

           Like verbose (-v | --verbose). Reports only when a change is made.


       -f, --silent, --quiet

           Force. Does not report errors.


       --from=CURRENT_OWNER:CURRENT_GROUP

           Change the owner and/or group of each  file  only  if  its  current
           owner  and/or group match those specified here. Either may be omit‐
           ted, in which  case  a  match  is  not  required  for  the  omitted
           attribute


       -h, --no-dereference

           If  the  file  is a symbolic link, this option changes the owner of
           the symbolic link. Without this option, the owner of the file  ref‐
           erenced by the symbolic link is changed.


       --help

           Display usage message and exit.


       -H

           If the file specified on the command line is a symbolic link refer‐
           encing a file of type directory, this option changes the  owner  of
           the  directory referenced by the symbolic link and all the files in
           the file hierarchy below it. If a symbolic link is encountered when
           traversing  a  file  hierarchy,  the  owner  of  the target file is
           changed, but no recursion takes place.


       -L

           If the file is a symbolic link, this option changes  the  owner  of
           the  file referenced by the symbolic link. If the file specified on
           the command line, or encountered during the traversal of  the  file
           hierarchy, is a symbolic link referencing a file of type directory,
           then this option changes the owner of the directory  referenced  by
           the symbolic link and all files in the file hierarchy below it.


       --no-preserve-root

           Do not treat `/' specially. This is the default.


       --preserve-root

           Do not operate recursively on `/'.


       -P

           If the file specified on the command line or encountered during the
           traversal of a file hierarchy  is  a  symbolic  link,  this  option
           changes the owner of the symbolic link. This option does not follow
           the symbolic link to any other part of the file hierarchy.


       --reference=RFILE

           Uses RFILE's owner and group. If RFILE is  missing,  then  gives  a
           diagnostic  error  message  and  returns a non-zero exit code. This
           option and -s option are mutually exclusive.


       -R, --recursive

           Recursive. chown descends through the directory, and any  subdirec‐
           tories,  setting the specified group ID as it proceeds. When a sym‐
           bolic link is encountered, the group of the target file is changed,
           unless  the  -h  or  -P  option is specified. However, no recursion
           takes place, unless the -H or -L option is specified.


       -s

           The owner and/or group arguments  are  Windows  SID  strings.  This
           option  requires  a file system that supports storing SIDs, such as
           ZFS. This option and --reference option are mutually exclusive.


       -v, --verbose

           Give a diagnostic for every file processed.



       Specifying more than one of the mutually-exclusive options -H,  -L,  or
       -P is not considered an error. The last option specified determines the
       behavior of chown.


       The following options are supported for /usr/xpg4/bin/chown:

       -f    Force. Does not report errors.


       -h    If the file is a symbolic link, this option changes the owner  of
             the  symbolic  link.  Without  this option, the owner of the file
             referenced by the symbolic link is changed.


       -H    If the file specified on the command line is a symbolic link ref‐
             erencing  a file of type directory, this option changes the group
             of the directory referenced by the  symbolic  link  and  all  the
             files  in  the  file  hierarchy  below  it. If a symbolic link is
             encountered when traversing a file hierarchy, the  group  of  the
             target file is changed, but no recursion takes place.


       -L    If  the file is a symbolic link, this option changes group of the
             file referenced by the symbolic link. If the  file  specified  on
             the command line, or encountered during the traversal of the file
             hierarchy, is a symbolic link referencing a file of  type  direc‐
             tory,  then this option changes the group of the directory refer‐
             enced by the symbolic link and all files in  the  file  hierarchy
             below it.


       -P    If  the  file specified on the command line or encountered during
             the traversal of a file hierarchy is a symbolic link, this option
             changes the group of the symbolic link. This option does not fol‐
             low the symbolic link to any other part of the file hierarchy.


       -R    Recursive. chown descends through the directory, and  any  subdi‐
             rectories,  setting the specified group ID as it proceeds. When a
             symbolic link is encountered, the group of  the  target  file  is
             changed,  unless the -h or -P option is specified. Unless the -H,
             -L, or -P option is specified, the  -L  option  is  used  as  the
             default mode.


       -s    The  specified  group is Windows SID. This option requires a file
             system that supports storing SIDs, such as ZFS.



       Specifying more than one of the mutually-exclusive options -H,  -L,  or
       -P is not considered an error. The last option specified determines the
       behavior of chown.

OPERANDS
       The following operands are supported:

       owner[:group]     A user ID and optional group ID  to  be  assigned  to
                         file.  The  owner  portion  of this operand must be a
                         user name from the user database or  a  numeric  user
                         ID.  Either  specifies  a user ID to be given to each
                         file named by file. If a numeric owner exists in  the
                         user  database  as  a  user  name, the user ID number
                         associated with that user name is used  as  the  user
                         ID.  Similarly,  if the group portion of this operand
                         is present, it must be a group name  from  the  group
                         database  or  a  numeric group ID. Either specifies a
                         group ID to be given to each file. If a numeric group
                         operand exists in the group database as a group name,
                         the group ID number associated with that  group  name
                         is used as the group ID.


       file              A  path  name  of a file whose user ID is to be modi‐
                         fied.


EXAMPLES
       Example 1 Changing Ownership of All Files in the Hierarchy



       The following command changes ownership of all files in the  hierarchy,
       including symbolic links, but not the targets of the links:


         example% chown −R −h owner[:group] file...


ENVIRONMENT VARIABLES
       See  environ(7) for descriptions of the following environment variables
       that affect the execution of chown:  LANG,  LC_ALL,  LC_CTYPE,  LC_MES‐
       SAGES, and NLSPATH.

EXIT STATUS
       The following exit values are returned:

       0     The  utility executed successfully and all requested changes were
             made.


       >0    An error occurred.


FILES
       /etc/passwd    System password file


ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:

   /usr/bin/chown
       tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE  TYPEAT‐
       TRIBUTE  VALUE _ Availabilitysystem/core-os _ CSIEnabled. See NOTES.  _
       Interface StabilityCommitted _ StandardSee standards(7).


   /usr/xpg4/bin/chown
       tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE  TYPEAT‐
       TRIBUTE  VALUE _ Availabilitysystem/xopen/xcu4 _ CSIEnabled. See NOTES.
       _ Interface StabilityCommitted _ StandardSee standards(7).


SEE ALSO
       chgrp(1),  chmod(1),  chown(2),  fpathconf(2),  passwd(5),   system(5),
       attributes(7), environ(7), standards(7)

NOTES
       chown is CSI-enabled except for the owner and group names.


       In  previous  releases  of  Solaris, there was a /usr/ucb/chown command
       which had different -R semantics with respect  to  how  symbolic  links
       were handled. /usr/ucb/chown changed ownership of the symbolic link but
       not the target file. To get this behavior  with  /usr/bin/chown,  addi‐
       tional flags need to be specified.



Oracle Solaris 11.4               4 Feb 2015                          chown(1)
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