How to Add a User in Linux: Master the useradd Command in 2026 (Ubuntu, Debian, RHEL)
How to Add a User in Linux: Master the useradd Command in 2026 (Ubuntu, Debian, RHEL)
Mastering Linux User Management is a core skill for any DevOps Engineer. In Tutorial #5 of our Linux for Beginners series, we focus on the useradd and adduser commands—essential tools for managing access on Dev, QA, and Production servers.
Whether you are automating user creation or manually onboarding a teammate, knowing the right flags (like -m for home directories) is critical for a clean server setup.
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🛠️ What You Will Learn in This Lesson:
🔥 The difference between useradd (low-level) and adduser (interactive).
🔥 How to create a user with a Home Directory using the -m flag.
🔥 Setting up passwords safely with the passwd command.
🔥 Best practices for User Management in a DevOps environment.
🔥 Managing permissions: Adding users to the sudo group.
📌 Timestamps & Key Moments:
00:00 - Introduction: Linux User Management for DevOps
01:08 - Multi-User Systems: How Linux Handles Access
02:02 - UIDs & System Users: Understanding User IDs
04:28 - Hands-On Lab: Setting Up Your Linux Environment
05:38 - The /etc/passwd File: Verifying New Users
07:31 - Creating Home Directories: The -m Flag Explained
08:54 - Groups & Custom Paths: Managing Home Directories
11:14 - Security: How to Set & Change User Passwords
12:43 - Custom UIDs: Assigning Specific User IDs
13:20 - Advanced Options: Comments & Account Expiry Dates
15:18 - Cleaning Up: How to Use the userdel Command
17:45 - Summary: Best Practices for Server Security
📋 User Management Cheat Sheet:
🔥 Create a basic user:
sudo useradd username
🔥 Create user + Home Directory:
sudo useradd -m username
🔥 Set/Change password:
sudo passwd username
🔥 Delete a user (and their files):
sudo userdel -r username
🔥 Check all users on system:
cat /etc/passwd
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