How to Scroll Horizontally in htop?
This article provides a quick overview and step-by-step guide on how
to navigate horizontally within the htop interactive
process viewer in Linux. When a running process has a long command line,
the text often cuts off at the edge of the terminal window. By using
specific keyboard arrow keys or standard navigation shortcuts, you can
easily shift the view to reveal the hidden arguments and full paths of
any running command.
Identifying the Need for Horizontal Scrolling
When monitoring system processes, the COMMAND column
in htop frequently contains extensive details, such as long
file paths, environment variables, or complex arguments. Because your
terminal width is limited, htop truncates this text by
default, which can obscure critical information needed for
troubleshooting or identification.
Step-by-Step Navigation
To view the full, hidden text of a process command line, use the
following interactive controls within the htop
interface:
- Scroll Right: Press the Right Arrow key ($$). This shifts the entire process list view to the right, exposing the truncated parts of the command line.
- Scroll Left: Press the Left Arrow key ($$). This shifts the view back to the left so you can see the process IDs (PIDs), user details, and resource usage metrics again.
Alternative Navigation Shortcuts
If you prefer using standard Unix text-navigation shortcuts or want
to move across the screen more quickly, htop also supports
the following keyboard inputs:
| Key Binding | Action |
|---|---|
| Ctrl + E or End | Automatically scrolls all the way to the end of the longest visible command lines. |
| Ctrl + A or Home | Snaps the view instantly back to the far left side of the screen. |
Using these built-in keyboard controls allows you to inspect any complex process string without needing to resize your terminal window or restart the tool with different arguments.