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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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.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.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.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.
usermod | 495
Linux
Commands
This is the Title of the Book, eMatter Edition
Copyright © 2006 O’Reilly & Associates, Inc. All rights reserved.
-D [options]
Set or display defaults. If options are specified, set them. If no
options are specified, display current defaults. The options
are:
-b dir
Home directory prefix to be used in creating home direc-
tories. If the -d option is not used when creating an
account, the user name will be appended to dir.
-e date
Expire date. Requires the use of shadow passwords.
-f days
Number of days after a password expires to disable an
account. Requires the use of shadow passwords.
-g group
Initial group name or ID number.
-s shell
Default login shell.
userdel
userdel [option] user
System administration command. Delete all entries for user in
system account files.
Option
-r Remove the home directory of user and any files contained in
it.
usermod
usermod [options] user
System administration command. Modify user account information.
Options
-c comment
Comment field.
-d dir
Home directory.
-e date
Account expiration date. date is in the format MM/DD/YYYY;
two-digit year fields are also accepted. The value is stored as
the number of days since January 1, 1970. This option
requires the use of shadow passwords.
-f days
Permanently disable account this many days after the pass-
word has expired. A value of -1 disables this feature. This
option requires the use of shadow passwords.
-g group
Initial ...
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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.