Manage Linux users: list all users

Linux user management: To view all users, specific code examples are required

In Linux systems, user management is an important part of system management. Understanding and viewing all users is one of the essential operations. This article will introduce how to view all users and provide specific code examples.

To view all users, you can use the following methods:

1. Use the cat command to view the /etc/passwd file
   In the Linux system, all user information is saved In the /etc/passwd file. We can use the cat command to view the contents of this file to obtain information about all users.

cat /etc/passwd

After executing the above command, the system will list the information of all users. Each user occupies one line, including user name, user ID, group ID, user information, home directory and Shell, etc. This method allows you to view basic information about all users in the system.

2. Use the cut command to filter specific fields
   If you only want to list all user names without including other information, you can use the cut command to filter specific fields.

cat /etc/passwd | cut -d: -f1

In the above command, the -d option specifies that the field separator is colon ":", and the -f option specifies that the field to be extracted is the first field, which is the user name. After executing this command, the system will list all user names, making it easy to view the names of all users.

3. Use the getent command to view all users
   The getent command can be used to obtain all information in the database, including users, groups, hosts, etc. We can use the getent command combined with the passwd database to view the information of all users.

getent passwd

After executing the above command, the system will list the detailed information of all users, including user name, user ID, group ID, user information, home directory and Shell, etc. Compared with the cat /etc/passwd command, the getent command displays more comprehensive and detailed information.

Through the above three methods, we can easily view all users in the Linux system and obtain their basic information. User management is one of the foundations of system management. Proficiency in user management-related operations is crucial to managing Linux systems. We hope that the code examples provided in this article can help readers better understand and master the relevant knowledge of Linux user management.

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