How to Install Htop on Rocky Linux EL9 or EL8


Htop is an excellent tool for anyone who wants a closer look at what’s happening inside their computer. The following tutorial will teach you how to install Htop Interactive Process Viewer on Rocky Linux 9 or Rocky Linux 8 with the Enterprise Linux Extra Packages repository using the command line terminal.

Recommended Steps Before Installation

First, before proceeding, update your system to ensure no conflicts occur during the installation.

sudo dnf upgrade --refresh

Install Htop Interactive Viewer

By default, Rocky Linux does not have Htop available from its appstream so you will need the EPEL repository first.

Enable EPEL Repository

Import EPEL for Rocky Linux 9 (EL9)

First, enable the CRB.

sudo dnf config-manager --set-enabled crb

Next, install EPEL using the following (dnf) terminal command.

sudo dnf install \
    https://dl.fedoraproject.org/pub/epel/epel-release-latest-9.noarch.rpm \
    https://dl.fedoraproject.org/pub/epel/epel-next-release-latest-9.noarch.rpm

Import EPEL for Rocky Linux 8 (EL8)

Like Rocky Linux 9, install EPEL using the following (dnf) terminal command to install the EPEL repository for Rocky Linux 8.

sudo dnf install \
    https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm \
    https://dl.fedoraproject.org/pub/epel/epel-next-release-latest-8.noarch.rpm

Install Htop

To proceed with the installation, use the following command.

sudo dnf install htop -y

Confirm the installation and version build using the htop –version command.

htop --version

Example output:

[joshua@rocky-linux ~]$ htop --version
htop 3.2.1

How to use Htop – Terminal Commands

As the name suggests, use the following command to bring up Htop in your terminal.

htop

The first time you open Htop, and after having a look, I would suggest pressing the F2 button and beginning to do some configurations, as you can customize or add missing things you would like to see.

Example of configuration menu:

Further options can be added to the Htop command, such as some standard parameters below.

ParameterFunction

-d
–delay= 10
Specify the update rate in 1/10 seconds
-C
–no-color
–no-color
Start without colors
-h
–help
Show quick help
-u
–user=username
Show only the specified user
-s
–sort-key
Sort by a specific column. A list of the permitted column names can be htop -s help output with
-v
–version
Show Htop version

One of the most common parameters is delaying the update frequency of Htop, as many have the application constantly running to monitor system or network performances.

htop -d 10

As mentioned above, this has added a ten-second delay, but you can specify anything you want in seconds.

Htop Keyboard Shorts

Below is a list of the most commonly used shortcuts.

KeysFunction
← , ↑ , → , ↓Scroll through the process list
⇧ + URemove all tags
. or ,Incremental search for the PID
F1 , ? , HShow help
UShow the processes of a user
F2 , ⇧ + SOpen setup and change settings
⇧ + HShow/hide user  threads
F3, ⇧ + /Incremental process name search
⇧ + KShow/hide kernel threads
F4, \Filter by name
⇧ + F.Pin the cursor to a process
F5 , TActivate/deactivate tree view
+ , –Expand/collapse the tree
F6, >Select the column to sort
⇧ + PSort processes by CPU usage
F7Decrease Nice value
⇧ + MSort processes by memory usage
F8Increase Nice value
⇧ + TSort processes by the time
F9, KEnd the process or processes of a day
LOpen files with lsof open
F10 , Q , Ctrl + C   break up
SSystem calls to stracetrace
Space barTag process
⇧ + LTrack library ltracecalls
II / O control

Additional Commands & Tips

Remove (Uninstall) Htop

Removing Htop from your system is straightforward. Use the following command.

sudo dnf autoremove htop -y

It is advised to keep EPEL installed, as this repository provides many alternative packages you may require in the future.

See also
How to Install NVIDIA Drivers on Rocky Linux EL9 or EL8

Conclusion

The tutorial has demonstrated how to install the Htop interactive viewer on Rocky Linux 9 or 8 by importing the EPEL repository and installing the viewer for your alternative “top command” replacement. Overall, most users prefer using Htop over the traditional Top viewer. It’s fantastic and lightweight compared to other options, such as Glance’s system monitor, and works well for desktop or server users.

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