chgrp - Changes the group ownership of a file or directory
chgrp [-fhR] group file
The chgrp command changes the group associated with the specified file or
directory to group.
Interfaces documented on this reference page conform to industry standards
Refer to the standards(5) reference page for more information about indus-
try standards and associated tags.
-f [Tru64 UNIX] Suppresses all error reporting.
-h [Tru64 UNIX] If file is a symbolic link, the command chgrp -h file
changes the group of the symbolic link. The command chgrp file changes
the group of the file referenced by the symbolic link.
-R Causes chgrp to descend recursively through its directory arguments,
setting the specified group ID.
A group name from the group database or a numeric group ID. Either
specifies a group ID to be given to each file named by one of the file
operands. 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.
A pathname of a file whose group ID is to be modified.
To change the group ID of a file, you must have superuser privilege or your
effective user ID must match the owner ID of the file. If you do not have
superuser privilege you can change the group ID of a file only to your
effective group ID or to the value of a group of which you are a member.
The group argument must be either a valid group name that already exists in
the group database or a valid group ID.
For each file operand, the chgrp command performs actions equivalent to the
chown() function called with the following arguments:
+ The file operand is used as the path argument.
+ The user ID of the file is used as the owner argument.
+ The specified group ID is used as the group argument.
Unless the chgrp command is invoked by a process with appropriate
privileges, the set-user-ID and set-group-ID bits of a file are cleared
upon successful completion.
1. If the chgrp command is invoked with the -R option and attempts but
fails to change the group ID of a particular file in a specified file
hierarchy, it continues to process the remaining files in the hierar-
2. If the chgrp command cannot read or search a directory within a
hierarchy, it continues to process the other parts of the hierarchy
that are accessible.
The following exit values are returned:
0 Successful completion, all requested changes were made.
>>0 An error occurred.
To change the group ownership of the file or directory named proposals to
chgrp staff proposals
The group access permissions for proposals now apply to staff. See chmod
The following environment variables affect the execution of chgrp:
Provides a default value for the internationalization variables that
are unset or null. If LANG is unset or null, the corresponding value
from the default locale is used. If any of the internationalization
variables contain an invalid setting, the utility behaves as if none of
the variables had been defined.
If set to a non-empty string value, overrides the values of all the
other internationalization variables.
Determines the locale for the interpretation of sequences of bytes of
text data as characters (for example, single-byte as opposed to multi-
byte characters in arguments).
Determines the locale for the format and contents of diagnostic mes-
sages written to standard error.
Determines the location of message catalogues for the processing of
Contains group information.
Commands: chmod(1), chown(1), groups(1)
Functions: chmod(2), chown(2)