whoami and id commands in Linux CLI - Mini Project: Build & Apply

Using whoami and id Commands in Linux

📖 Scenario: You are working on a Linux system and want to learn how to find out your current username and user ID information using simple commands.

🎯 Goal: Learn to use the whoami command to display your current username and the id command to show your user ID, group ID, and group memberships.

📋 What You'll Learn

Use the whoami command to display the current username.

Use the id command to display user ID and group information.

💡 Why This Matters

🌍 Real World

Knowing your username and user ID is important for managing permissions and running commands with the right access on Linux systems.

💼 Career

System administrators and developers often need to check user identity and permissions quickly using these commands.

1

Display your current username using whoami

Type the command whoami to display your current username.

Linux CLI

# Type whoami command below
# Your code here

Need a hint?

The whoami command shows the username you are logged in as.

2

Display your user ID and group information using id

Type the command id to display your user ID, group ID, and groups you belong to.

Linux CLI

whoami
# Type id command below
# Your code here

Need a hint?

The id command shows detailed user and group information.

3

Use id command with your username

Use the command id $(whoami) to display the user ID and group information for your current username explicitly.

Linux CLI

whoami
id
# Type id command with $(whoami) below
# Your code here

Need a hint?

This runs id on the username returned by whoami.

4

Display only your user ID using id

Use the command id -u to display only your numeric user ID.

Linux CLI

whoami
id
id $(whoami)
# Type id -u command below
# Your code here

Need a hint?

The id -u command shows only your user ID number. The exact number depends on your system.