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This article mainly shows you how to view all users of the Linux system, the content is simple and easy to understand, and the organization is clear. I hope it can help you solve your doubts. Let Xiaobian take you to study and learn "How to view all users of the Linux system".

*1. View all users in Linux *

(1)In the terminal. The file/etc/passwd is not included.

(2)Look at the third parameter:500 or more, is built behind the user. Others are users of the system.

Or cat /etc/passwd| cut -f 1 -d :

2. User management commands

useradd Note: add user

adduser Note: add user

passwd Note: Set password for user

usermod Note: Modify user commands, you can modify the login name, user's home directory, etc. through usermod;

pwcov Note: Synchronizing users from/etc/passwd to/etc/shadow

pwck Note: pwck is to verify whether the contents of the user configuration files/etc/passwd and/etc/shadow are legal or complete;

pwunconv Note: This is the reverse operation of pwcov, which creates/etc/passwd from/etc/shadow and/etc/passwd, and then deletes the/etc/shadow file;

finger Note: View User Information Tool

id Note: View the UID, GID and user group to which the user belongs

chfn Note: Change User Information Tool

su Note: User Switching Tool

sudo Note: sudo is to execute a command as another user, su is used to switch users, and then switch to the user to complete the corresponding task, but sudo can directly execute the command, such as sudo does not need the root password to execute the root assigned to the execution only root can execute the corresponding command; but through visudo to edit/etc/sudoers to achieve;

visodo Note: visodo is the command to edit/etc/sudoers; you can also use vi to edit/etc/sudoers directly without this command. The effect is the same;

sudoedit Note: Similar to sudo;

3. Tools or commands for managing user groups;

groupadd Note: Add a user group;

groupdel Note: Delete user groups;

groupmod Note: Modify user group information

groups Note: Displays the user groups to which the user belongs

grpck

grpconv Note: synchronize or create/etc/gshadow by the contents of/etc/group and/etc/gshadow files, or create/etc/gshadow if it does not exist;

grpunconv Note: Sync or create/etc/group by the contents of the/etc/group and/etc/gshadow files, then delete the gshadow file

Linux is a free-to-use and freely distributed UNIX-like operating system, is a POSIX-based multi-user, multitasking, multi-threaded and multi-CPU operating system, using Linux to run major Unix tools, applications and network protocols.

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