September 2009
Beginner
942 pages
85h 34m
English
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Name
useradd
Synopsis
useradd [options] [user]
System administration command. Create new user accounts or update default account information. Unless invoked with the -D option, user must be given. useradd will create new entries in system files. Home directories and initial files may also be created as needed.
Options
- -b dir, --base-dir dir
Specify base dir for home directories. The default is /home.
- -c comment, --comment comment
Comment field.
- -d dir, --home dir
Home directory. The default is to use user as the directory name under the home directory specified with the -D option.
- -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, --base-dir dir
Home directory prefix to be used in creating home directories. If the -d option is not used when creating an account, the user name is appended to dir.
- -e date, --expiredate date
Expire date. Requires the use of shadow passwords.
- -f days, --inactive days
Number of days after a password expires to disable an account. Requires the use of shadow passwords.
- -g group, --gid group
Initial group name or ID number.
- -s shell, --shell shell
Default login shell.
- -e date, --expiredate date
Account expiration date. Use 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, --inactive days
Permanently disable account this many days after the password ...
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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.