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Book Overview & Buying
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Table Of Contents
Ubuntu Server Cookbook
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While installing Ubuntu, we add a primary user account on the server; if you are using the cloud image, it comes preinstalled with the default user. This single user is enough to get all tasks done in Ubuntu. There are times when you need to create more restrictive user accounts. This recipe shows how to add a new user to the Ubuntu server.
You will need super user or root privileges to add a new user to the Ubuntu server.
Follow these steps to create the new user account:
$ sudo adduser bob
sudo privileges:


Y to confirm that information is correct:
/etc/passwd:
In Linux systems, the adduser command is higher level command to quickly add a new user to the system. Since adduser requires root privileges, we need to use sudo along with the command, adduser completes following operations:
home directory with skeletal configuration (template) from /etc/skel.If you want to skip the password prompt and finger information while adding the new user, use the following command:
$ sudo adduser --disabled-password --gecos "" username
Alternatively, you can use the useradd command as follows:
$ sudo useradd -s <SHELL> -m -d <HomeDir> -g <Group> UserName
Where:
-s specifies default login shell for the user-d sets the home directory for the user-m creates a home directory if one does not already exist-g specifies the default group name for the userCreating a user with the command useradd does not set password for the user account. You can set or change the user password with the following command:
$sudo passwd bob
This will change the password for the user account bob.
Note that if you skip the username part from the above command you will end up changing the password of the root account.
With adduser, you can do five different tasks:
--group option and without the--system option--system optionCheck out the manual page man adduser to get more details.
You can also configure various default settings for the adduser command. A configuration file /etc/adduser.conf can be used to set the default values to be used by the adduser, addgroup, and deluser commands. A key value pair of configuration can set various default values, including the home directory location, directory structure skel to be used, default groups for new users, and so on. Check the manual page for more details on adduser.conf with following command:
$ man adduser.conf
useradd, a low level command to add new user to systemusermod, a command to modify a user account