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chgrp(1) General Commands Manual chgrp(1) NAME chgrp - Changes the group ownership of a file or directory SYNOPSIS chgrp [-fhR] group file The chgrp command changes the group associated with the specified file or directory to group. STANDARDS Interfaces documented on this reference page conform to industry stan- dards as follows: chgrp: XPG4, XPG4-UNIX Refer to the standards(5) reference page for more information about in- dustry standards and associated tags. OPTIONS [DIGITAL] Suppresses all error reporting. [DIGITAL] If file is a symbolic link, the command chgrp -h file changes the group of the sym- bolic link. The command chgrp file changes the group of the file refer- enced by the symbolic link. Causes chgrp to descend recursively through its directory arguments, setting the specified group ID. OPERANDS 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 modi- fied. DESCRIPTION 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 ex- ists 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 ar- gument. Unless the chgrp command is invoked by a process with appropriate priv- ileges, the set-user-ID and set-group-ID bits of a file are cleared upon successful completion. NOTES 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- chy. 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. EXIT STATUS The following exit values are returned: Successful completion, all re- quested changes were made. An error occurred. EXAMPLES To change the group ownership of the file or directory named proposals to staff, enter: chgrp staff proposals The group access permissions for proposals now apply to staff. See chmod for details. ENVIRONMENT VARIABLES The following environment variables affect the execution of chgrp: Pro- vides 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 vari- ables contain an invalid setting, the utility behaves as if none of the variables had been defined. If set to a non-empty string value, over- rides the values of all the other internationalization variables. De- termines 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 messages written to standard error. Deter- mines the location of message catalogues for the processing of LC_MES- SAGES. FILES Contains group information. SEE ALSO Commands: chmod(1), chown(1), groups(1) Functions: chmod(2), chown(2) Files: group(4) Standards: standards(5) chgrp(1)