What are the common user management commands in the Linux operating system?

Do user management commands manage users?

Add user useradd

Delete the user userdel

Add group groupadd

Delete the groupdel

Change user passwords, passwd, etc.

Common user management commands in Linux:

groups

Lists all groups to which the current user belongs.

newgrp

groupname

Change the valid user group of the current user to groupname. A user can belong to multiple groups, but only one.

A valid user group, which belongs to a valid user group when it creates a new file.

dhome]

sshell]

ccomment]-m-k

template]]

finactive]-eex

pire-p

passwd

unameCreate a user with the username unamepasswd

useraccount]

Set a password for the useraccount.

usermod

lu][-c

Remarks] [d

Login to the directory "][e

Expiration date] [f

Buffer days] [g

Groups] [g

Group]-l

Account Name] [s

u[User ID].

Change some of the user's attributes.

userdel

r]username

To delete a user, -r means to delete along with the home directory.

finger

username

View information about usernam.

idusername]

Query the user's UID and GID data.

groupadd

ggid]r]groupname

Create a group named groupname, and -r indicates the establishment of a system user group.

groupmod

ggid]nnew_name]

ori_groupname

Change the name and ID of the group

groupdel

groupname]

Delete a user group.

gpasswd

Change the group password.

The Linux operating system consists of two main components:

Kernel: The Linux kernel is the core part of the operating system and is responsible for managing computer hardware and providing basic system functions. It handles interaction with hardware, memory management, process scheduling, device drivers, and more.

The kernel is the core engine of the Linux operating system.

User space: User space is the environment in the operating system for users and applications to run. It contains a variety of applications, tools, and services for users to interact with and perform a variety of tasks.

The user space provides functions such as file management, network communication, graphical interface, command line terminal, etc.

The user refers to the end user who operates the Xiaoqiao Zen system, and they can interact with the operating system through the graphical interface or command line interface to perform various operations and tasks.

In addition to the user and kernel, there are other important components that make up the complete Linux operating system, such as system libraries, file systems, network stacks, drivers, etc. These components work together to make the Linux operating system a powerful, flexible, and customizable open-source** operating system.

The Linux operating system consists of a kernel that is responsible for the underlying management and access to hardware resources, while the userspace provides a user interface and a variety of applications for users to interact with and perform tasks with the operating system.

Linux commands are commands that manage the Linux system. For the Linux system, whether it is the Zhonghui processor, memory, disk drive, keyboard, mouse, or user, etc., are all files, the Linux system management command is its normal operation with Biru core, similar to the previous DOS commands. There are two types of Linux commands in the system:

Built-in shell commands and Linux commands.

Mode switching. 1. From the graph to the character logout or init3.

2. From the character to the graphical interface init5.

3. Exit or exit or ctrld.

4. Cancel CtrlaltBackspace.

5. Shutdown poweroff or init0 or shutdown-hnow or halt-p.

6. Restart reboot or init6 or shutdown-rnow.

1. The common operation commands of the Linux system are as follows: ls: full spelling list, the function is to list the content of the directory and its content attribute information.

cd: spelling changedirectory,The function is to switch from the current working directory to the specified working directory。 cp：

Spelling copy,Its function is to copy files or directories。

2. Kill process killvi command vi vim is the most commonly used texter in linux, and it is very powerful.

3. The basic Linux operation command is as follows: Check the kernel version: uname-a.

Console-GUI: init5 or startx. Graphical Interface - Console:

4. Linux common command: pwd command, the English interpretation of this command is printworkingdirectory (print working directory). Enter the pwd command, and Linux will output the current directory.

cd command, the cd command is used to change the directory in which it is located.

5. There are two types of Linux commands in the system: built-in shell commands and Linux commands. The mode is switched from the graph to the character logout or init3.

From characters to the graphical interface init5. Exit or exit or slide potato ctrld. Log out of CtrlaltBackspace.

6. The grep command in Linux system is a powerful text search tool, grep allows the text file to be searched in the form of a room. If a matching pattern is found, grep prints all rows that contain the pattern. The general format of grep is:

When entering string roll parameters in the grep command, it is best to enclose them in quotation marks or double quotation marks. For example: grep'a'txt.