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Linux in a Nutshell

This directory of Linux commands is from Linux in a Nutshell, 5th Edition.

Click on any of the 687 commands below to get a description and list of available options. All links in the command summaries point to the online version of the book on Safari Bookshelf.

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groupmod

groupmod [options] group

System administration command. Modify group information for group.

Options

-g gid

Change the numerical value of the group ID. Any files that have the old gid must be changed manually. The new gid must be unique, unless the -o option is used.

-n name

Change the group name to name.

-o

Override. Accept a nonunique gid.