Add delete new user in Linux/ubuntu

Operating environment: Ubuntu Server 14.04, there is only one user root on the system

1. adduser command to add a new user

#adduser username

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Note the difference between the AddUser and the Useradd command, Useradd is a binary executable tool in the Linux system, and AddUser is a script that can be executed after the useradd is encapsulated. So AddUser is more powerful and intelligent than Useradd, adduser to create user home directories and other related work while creating users.

2. Assigning new User Administrator privileges

Simply adding users to the sudo user group gives them administrator privileges.

#groups username//View the group to which the user belongs #usermod-g groupname username//Change the group to which the user belongs #usermod-g groupname username//Add user to New group #id username//view uid, GID for user

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3.deluser command to delete a user

The Deluser command without any parameters simply removes the user from the system, but all information and files related to that user, such as the home directory, are retained. To remove the user from the system cleanly and thoroughly, you need to join the--remove-all-files option.

#deluser--remove-all-files username//delete users and their related files and information #groupdel groupname//delete user Group Group

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4. Consistent creation of new users and actions to upgrade to administrators

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Reference link: Linux Add/Remove users and user groups

Appendix:

User's permission profile is set in the/etc/sudoers file

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# User Privilege Specificationroot all= (all:all) all

sudo group permission settings

# Allow members of the group sudo to execute any command%sudo all= (all:all) all

It is visible that the sudo group user has the same permissions as root, with a% name representing the user group, with no% as a single user name, so in order to give a user administrator permission you can also add a line with the following configuration information directly:

Username All= (All:all) all

Reference Link: sudoers configuration file

This article is from "Whispering Autumn Wind" blog, please be sure to keep this source http://xjhznick.blog.51cto.com/3608584/1670964

Add delete new user in Linux/ubuntu