How to Search for a Process by Name or PID in htop?

The htop interactive process viewer is a powerful alternative to the traditional top command in Linux, offering a real-time, color-coded overview of system resources. While navigating a massive list of running processes can be overwhelming, htop provides dedicated, efficient built-in shortcuts to instantly filter or locate specific processes by their name or Process ID (PID). This guide will walk you through using the search and filter functions to pinpoint exactly what you are looking for in seconds.

Searching for a Process by Name

If you want to find a process but keep the rest of the process list visible, you can use the native search function. This highlights the matching results as you type.

• Step 1: Open htop in your terminal.
• Step 2: Press the F3 key (or the / key) to open the search prompt at the bottom of the screen.
• Step 3: Type the name of the process you want to find (for example, nginx or python).
• Step 4: The cursor will automatically jump to the first matching entry. To cycle through next matches, press F3 again.

Filtering the Process List by Name

When dealing with hundreds of active threads, it is often easier to hide everything else and only display the processes you care about. The filtering tool is perfect for this scenario.

• Step 1: Press the F4 key (or the \ key) to activate the filter bar.
• Step 2: Type the process name or keyword.
• Step 3: The screen will instantly update, hiding all unrelated processes and leaving only the ones that match your query.
• Step 4: To clear the filter and return to the full list, press F4, clear the text with Backspace, and hit Enter.

Finding a Process by PID

While typing a PID into the search (F3) or filter (F4) menus will successfully locate the numbers, htop also allows you to sort the entire process list by PID for easier navigation.

• Step 1: Click on the PID column header at the top of the process list using your mouse, or use the F6 key to open the “Sort by” menu.
• Step 2: Select PID from the menu and press Enter to sort the list numerically.
• Step 3: Use the F3 search function to type the exact PID number, which will instantly highlight the specific process on your sorted list.