What is user and user group in Linux?

Let’s start by talking about the ownership of Linux files. User: the owner of the file (person who created the file). Group: the group can contain multiple users. Therefore, all users in that group will have the same permissions. It makes things easier than assign permission for every user you want.

What groups is a user in Linux?

Every user on Linux belongs to a primary group. A user’s primary group is usually the group that is recorded in your Linux system’s /etc/passwd file. When a Linux user logs into their system, the primary group is usually the default group associated with the logged in account.

How do I get a list of users in Linux?

Use the “cat” command to list all the users on the terminal to display all the user account details and passwords stored in the /etc/passwd file of the Linux system. As shown below, running this command will display the usernames, as well as some additional information.

How groups are managed in Linux?

On Linux, group information is held in the /etc/group file. You can use commands to create a group, add a user to a group, display a list of the users who are in the group, and remove a user from a group.

How users are managed in Linux?

User management can be done in three ways on a Linux system. Graphical tools are easy and suitable for new users, as it makes sure you’ll not run into any trouble. Command line tools includes commands like useradd, userdel, passwd, etc. These are mostly used by the server administrators.

What is the difference between user and group?

Users can be either people, meaning accounts tied to physical users, or accounts which exist for specific applications to use. Groups are logical expressions of organization, tying users together for a common purpose. Users within the same group can read, write, or execute files owned by the group.

Why do we need groups in Linux?

User groups play an important role on Linux systems. They provide an easy way for a select groups of users to share files with each other. They also allow sysadmins to more effectively manage user privileges, since they can assign privileges to groups rather than individual users.