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useradd Command Guide: Create New User Accounts
`useradd` command is used to create new user accounts on a Linux system. This command goes beyond simply adding a username; it allows you to set various attributes of the account, such as the user's home directory, shell, group membership, and more. It is essential for system administrators when registering new users or creating service accounts. Use this guide to learn the basics of `useradd` and its various options.
userdel Command Guide: Delete User Accounts
`userdel` command is used to delete existing user accounts on a Linux system. This command is important for cleaning up system resources and maintaining security by removing user account information and optionally their home directories and mail spools. It is essential when system administrators need to remove accounts that are no longer necessary. Use this guide to learn the basics of using `userdel` and its various options.
usermod Command Guide: Modify User Account Properties
`usermod` command is used to modify the properties of an already created user account in a Linux system. It allows system administrators to easily modify various account information such as the user's home directory, shell, group membership, expiration date, etc., making it an essential tool for maintaining existing accounts. Through this guide, learn the basic usage of `usermod` and its various options.
vcgencmd: Querying Raspberry Pi System Information
`vcgencmd` is a command-line tool used to interact with the GPU firmware of the Raspberry Pi to check various system information. This command allows you to easily query CPU temperature, voltage, clock frequency, memory split, and more.