chgrp

chgrp
	Example usage ofchgrpcommand to change the files' groups
Developer(s)	AT&T Bell Laboratories
Initial release	May 1975;49 years ago
Written in	Plan 9:C
Operating system	Unix,Unix-like,Plan 9,Inferno,IBM i
Platform	Cross-platform
Type	Command
License	Plan 9:MIT License

Thechgrp(fromchangegroup)commandmay be used byunprivilegedusers on variousoperating systemsto change thegroupassociated with afile systemobject (such as acomputer file,directory,or link) to one of which they are a member. A file system object has 3 sets of access permissions, one set for the owner, one set for the group and one set for others. Changing the group of an object could be used to change which users can write to a file.

History

Thechgrpcommand was originally developed as part of theUnixoperating system byAT&T Bell Laboratories.

It is also available in thePlan 9andInfernooperating systems and in mostUnix-likesystems.

Thechgrpcommand has also been ported to theIBM ioperating system.^[1]

The version ofchgrpbundled inGNU coreutilswas written by David MacKenzie.^[2]

Syntax

chgrp [options]groupFSO

Thegroupparameter specifies the new group with which the files or directories should be associated. It may either be a symbolic name or anidentifier.
TheFSOspecifies one or more file system objects, which may be the result of aglobexpression like*.conf.

Frequently implemented options

-Rrecurse through subdirectories.

-vverbosely output names of objects changed. Most useful when"FSO"is a list.

-fforce or forge ahead with other objects even if an error is encountered.

Example

$ls-l*.conf
-rw-rw-r-- 1 gbeeker wheel 3545 Nov 04 2011 prog.conf
-rw-rw-r-- 1 gbeeker wheel 3545 Nov 04 2011 prox.conf
$chgrpstaff*.conf
$ls-l*.conf
-rw-rw-r-- 1 gbeeker staff 3545 Nov 04 2011 prog.conf
-rw-rw-r-- 1 gbeeker staff 3545 Nov 04 2011 prox.conf

The above command changes the group associated with fileprog.conffromwheeltostaff(provided the executing user is a member of that group). This could be used to allow members of staff to modify the configuration for programsprogandprox.

References

^IBM."IBM System i Version 7.2 Programming Qshell"(PDF).IBM.Archived(PDF)from the original on 2020-09-18.Retrieved2020-09-05.
^chgrp(1)–LinuxUserManual– User Commands

External links

chgrp:change the file group ownership – Shell and Utilities Reference,The Single UNIX Specification,Version 4 fromThe Open Group
chgrp(1)–Plan 9Programmer's Manual, Volume 1
chgrp(1)–InfernoGeneral commandsManual

[1] IBM."IBM System i Version 7.2 Programming Qshell"(PDF).IBM.Archived(PDF)from the original on 2020-09-18.Retrieved2020-09-05.

[2] chgrp(1)–LinuxUserManual– User Commands

[1]

[2]

v t e Unix command-line interfaceprograms andshell builtins
File system	cat chattr chmod chown chgrp cksum cmp cp dd du df file fuser ln ls mkdir mv pax pwd rm rmdir split tee touch type umask
Processes	at bg crontab fg kill nice ps time
User environment	env exit logname mesg talk tput uname who write
Text processing	awk basename comm csplit cut diff dirname ed ex fold head iconv join m4 more nl paste patch printf read sed sort strings tail tr troff uniq vi wc xargs
Shell builtins	alias cd echo test unset wait
Searching	find grep
Documentation	man
Software development	ar ctags lex make nm strip yacc
Miscellaneous	bc cal expr lp od sleep true and false
Categories Standard Unix programs Unix SUS2008 utilities List

v t e Plan 9 command-line interfaceprograms andshell builtins
File system	chmod chgrp cmp cp dd du file gzip ls mkdir pwd rm split tee touch
Processes	kill ps
User environment	passwd who
Text processing	awk basename comm diff ed eqn join sed sort spell strings tail tr troff uniq wc
Shell builtins	echo test
Networking	ip/ipconfig ip/ping netstat
Searching	grep
Software development	ar hoc lex nm strip yacc
Miscellaneous	bc cal fortune sleep
Category

v t e GNU Core Utilities command-line interfaceprograms
File system	chcon chmod chown chgrp cksum cp dd df dir dircolors install ln ls mkdir mkfifo mknod mktemp mv realpath rm rmdir shred sync touch truncate vdir
Text utilities	b2sum base32 base64 cat cksum comm csplit cut expand fmt fold head join md5sum nl numfmt od paste ptx pr sha1sum shuf sort split sum tac tail tr tsort unexpand uniq wc
Shell utilities	arch basename chroot date dirname du echo env expr factor false groups hostid id link logname nice nohup nproc pathchk pinky printenv printf pwd readlink runcon seq sleep stat stdbuf stty tee test timeout true tty uname unlink uptime users who whoami yes