Linux Terminal Command: ps

The ps command is an essential tool in Process & Job Control. In this tutorial, we will explore what ps does, look at everyday examples, and cover advanced options to supercharge your command-line workflow.

Concept & Explanation

The ps command provides static process tracking data. It shows process IDs (PID), memory usage, CPU status, and command names.

Common Options & Syntax

ps [options] [arguments]

Here are the most common flags used with ps:

• Simple Usage: Basic default commands.
• Detailed View: Shows diagnostic information.
• Advanced Actions: Can chain parameters for scripting.

1. Interactive Example (Simple)

Here is how most people run the command:

# Example
ps

What it does: Lists active processes running in the current terminal session.

2. Power-User Example (Advanced)

For scripting and advanced diagnostics, use this configuration:

# Advanced
ps aux | grep nginx

What it does: Lists every running process on the system (a for all users, u for user details, x for processes not attached to terminal) and filters for Nginx.

⚙️ Warning & Common Pitfalls

[!WARNING] ps outputs a static snapshot. For real-time interactive process monitoring, use top or htop.

🔗 Related Commands

Here are some related posts on cli_tty1 you might want to check out:

• top : Display Linux processes in real time.
• htop : Interactive process viewer.