How to implement multi-user and permission management in Kirin operating system?

How to implement multi-user and permission management in Kirin operating system?

As an autonomous and controllable operating system oriented to the public domain and government affairs scenarios, Kirin operating system has strict security requirements in terms of multi-user and permission management. In this article, we will introduce the implementation of multi-user and permission management in Kirin operating system, including the creation and management of user accounts, the allocation and restriction of permissions, and related code examples.

1. Creation and management of user accounts

1. User account creation
   In the Kirin operating system, the creation of user accounts is completed by using the useradd command. The syntax of this command is as follows:

useradd [选项] 用户名

Among them, the user account related information (such as login name, user group, home directory, etc.) will be saved in the system's account database file /etc/passwd.

2. User Account Management
   Kirin Operating System provides a series of commands for managing user accounts, including modifying user information, deleting users, setting user passwords, etc. The following are some commonly used command examples:

# 修改用户信息
usermod [选项] 用户名

# 删除用户
userdel [选项] 用户名

# 设置用户密码
passwd [选项] 用户名

2. Assignment and restriction of permissions

1. Creation and management of user groups
   In the Kirin operating system, users Groups are a mechanism that groups multiple users together to facilitate management and assignment of permissions. The creation of user groups is accomplished using the groupadd command. The syntax of this command is as follows:

groupadd [选项] 组名

2. Allocation and restriction of permissions
   Kylin operating system allocates and restricts users' access to files or directories through the access control list (ACL) of the file system. access permission. ACL includes permission control for file owners, user groups, and other users. The following are some commonly used command examples:

# 设置文件权限
chmod [选项] 权限 文件名

# 为目录设置默认权限
setfacl [选项] -d -m 权限 目录名

3. Related code examples

The following is a simple code example showing how to create users and set up user groups in Kirin Operating System , assign permissions and other operations:

import os

# 创建用户
def create_user(username):
    os.system(f'useradd {username}')

# 创建用户组
def create_group(groupname):
    os.system(f'groupadd {groupname}')

# 分配权限
def set_permissions(filepath, permissions):
    os.system(f'chmod {permissions} {filepath}')

# 示例用法
create_user('user1')
create_group('group1')
set_permissions('/path/to/file.txt', '755')

In summary, Kirin operating system realizes multi-user and Rights management function. The implementation of these functions provides strong support for the security of Kirin operating system in public domain and government affairs scenarios.

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