How to View Process Details in htop on Ubuntu

htop is a powerful system monitor for Ubuntu that provides a dynamic real-time view of running processes. While the main interface shows a summary, accessing detailed information about specific processes is crucial for troubleshooting and resource management. This guide explains the simple keystrokes required to open the detailed process information panel within htop to inspect command lines, environment variables, and more.

Prerequisites

Ensure htop is installed on your Ubuntu system. If it is not installed, open a terminal and run the following command:

sudo apt update
sudo apt install htop

Steps to View Detailed Process Information

1. Launch htop: Open your terminal and type htop, then press Enter. You may need to use sudo htop to view processes owned by other users.
2. Select a Process: Use the up and down arrow keys to navigate through the list and highlight the process you want to inspect.
3. Open Details Panel: Press the Enter key on your keyboard. This action opens the “Process Details” screen for the selected item.
4. Review Information: The panel displays detailed data including the full command line, environment variables, current working directory, and memory usage.
5. Exit Panel: Press Enter or Esc to close the detailed information panel and return to the main process list.
6. Quit htop: When finished, press F10 or q to exit the application completely.