July 2005
Intermediate to advanced
944 pages
158h 24m
English
book
Linux in a Nutshell, Fifth Edition
by Ellen Siever, Aaron Weber, Stephen Figgins, Robert Love, Arnold Robbins
Content preview from Linux in a Nutshell, Fifth Edition
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grpck | 197
Linux
Commands
This is the Title of the Book, eMatter Edition
Copyright © 2006 O’Reilly & Associates, Inc. All rights reserved.
--service servicename
Add the group to a special service category. Normally, this is
“files,” but it may also be “ldap.”
--usage
Display a very short list of acceptable options for the
command.
-v, --version
Print the version number, then quit.
groupdel
groupdel group
System administration command. Remove group from system
account files. You may still need to find and change permissions on
files that belong to the removed group.
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.
groups
groups [options] [users]
Show the groups that each user belongs to (default user is the
owner of the current group). Groups are listed in /etc/passwd and
/etc/group.
Options
--help
Print help message.
--version
Print version information.
grpck
grpck [option] [files]
System administration command. Remove corrupt or duplicate
entries in the /etc/group and /etc/gshadow files. Generate warnings
for other errors found. grpck will prompt for a “yes” or “no” before
deleting entries. If the user replies “no,” the
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.