passwd Command Examples in Linux¶

Introduction¶

These examples show practical ways to use passwd on a Linux terminal. Each example is written so you can adapt it for administration or troubleshooting.

Example 1: Basic Usage¶

passwd

This is the simplest form of the command and is a good starting point before adding options.

Example 2: Common Admin Task¶

sudo passwd student

This example reflects a common task on RHEL, Rocky Linux, AlmaLinux, or similar systems.

Example 3: Useful Option¶

sudo passwd -S student

This option helps narrow the result, change behavior, or handle a more realistic target.

Example 4: Real-World Scenario¶

sudo passwd -l student

Use this pattern when the task moves beyond a single basic command.

Example 5: Verification¶

sudo passwd -S student

Example output:

student LK 2026-05-30 0 99999 7 -1 (Password locked.)

Common Mistakes¶

• Assuming password lock blocks SSH key authentication.
• Unlocking an account without checking expiry or aging settings.
• Using weak temporary passwords on shared systems.

Quick Reference¶

passwd
sudo passwd student
sudo passwd -S student
sudo passwd -l student
sudo passwd -S student

Related Guides¶

• What is passwd?
• passwd lock and unlock explained
• passwd Password Aging
• passwd interview questions

Summary¶

Good passwd usage means choosing the right option, keeping the target clear, and verifying the result with output you can explain.