User and Group Management

Managing users and groups is essential for system administration in Linux. Here’s an explanation of the key commands:

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1.adduser

It is used to create a new user account.

sudo adduser user-name

Follow the prompts to set a password and provide additional information for the new user.

For verifying the user :

id <user-name>

2.addgroup

It is used to create new groups

sudo addgroup group-name

3. usermod

To add the user to a specific group

sudo usermod -aG group-name user-name

The -aG options stand for "append to groups."

4. id

It is used to display user ID (UID), group ID (GID), and other group memberships of a user.

Key Information Displayed:

• UID (User ID): A unique numerical identifier for the user.

• GID (Group ID): The primary group ID of the user.

• Groups: A list of all the groups the user belongs to.

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