How to install htop on RHEL 8 using yum

I am a new user of Red Hat Enterprise Linux 8. How do I install htop on RHEL 8 using the yum command?

Introduction – htop is nothing but Interactive process viewer for RHEL (Red Hat Enterprise) 8 Linux . It is just like default top command with an additional set of options and better display on the screen. This page shows how to install htop on RHEL 8 using yum command.

How to install htop on RHEL 8 using yum

The procedure for installing htop on Red Hat Enterprise Linux 8 is as follows:

Open the terminal window.
For remote RHEL 8 server login using ssh command.
Enable EPEL repo for RHEL 8 server or desktop
Execute yum search htop command to search for htop on RHEL 8
Run sudo yum install htop to install htop in RHEL 8

Let us see all steps and command in details.

Enable EPEL repo for RHEL 8

sudo yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm sudo yum update

RHEL 8 install htop

Let us search for htop package using yum command:
yum search htop

Sample outputs:Last metadata expiration check: 0:07:38 ago on Thursday 22 August 2019 04:46:52 PM UTC.
======================================================================== Name Exactly Matched: htop ====
htop.x86_64 : Interactive process viewer

Get information about htop package

Run the following command:
yum info htop
Sample outputs:

Last metadata expiration check: 0:08:20 ago on Thursday 22 August 2019 04:46:52 PM UTC.
Available Packages
Name         : htop
Version      : 2.2.0
Release      : 6.el8
Arch         : x86_64
Size         : 112 k
Source       : htop-2.2.0-6.el8.src.rpm
Repo         : epel
Summary      : Interactive process viewer
URL          : http://hisham.hm/htop/
License      : GPLv2+
Description  : htop is an interactive text-mode process viewer for Linux, similar to
             : top(1).

Install htop

Finally, run the following to install htop on RHEL 8:
sudo yum install htop

How to use htop command

The syntax is:
htop htop [options] htop [options] arg
Running htop on RHEL 8 Linux server
One can use a monochrome color scheme, run:
htop -C htop --no-color
Want to see the tree view by default when running htop? Try:
htop -t htop --tree
Let us see only processes of a given user named vivek:
htop -u vivek htop --user=vivek htop --user=nginx
Limit and show process for only the given PIDs:
htop -p PID htop -p PID1,PID2 --pid=PID,[,PID,PID...] htop -p 1342 htop -p 7435,1367

htop keyboard shortcut keys

The following commands are supported while in htop:

Command	Description
`Up arrow key`	Select (highlight) the previous process in the process list. Scroll the list if necessary.
`Down arrow key`	Select (highlight) the next process in the process list. Scroll the list if necessary.
`Left arrow key`	Scroll the process list left.
`Right arrow key`	Scroll the process list right.
`PgUp, PgDn`	Scroll the process list up or down one window.
`Home`	Scroll to the top of the process list and select the first process.
`End`	Scroll to the bottom of the process list and select the last process.
`s`	Trace process system calls: if strace(1) is installed, pressing this key will attach it to the currently selected process, presenting a live update of system calls issued by the process.
`l`	Display open files for a process: if lsof(1) is installed, pressing this key will display the list of file descriptors opened by the process.
`u`	Show only processes owned by a specified user.
`M`	Sort by memory usage (top compatibility key).
`P`	Sort by processor usage (top compatibility key).
`T`	Sort by time (top compatibility key).
`F`	“Follow” process: if the sort order causes the currently selected process to move in the list, make the selection bar follow it. This is useful for monitoring a process: this way, you can keep a process always visible on screen. When a movement key is used, “follow” loses effect.
`K`	Hide kernel threads: prevent the threads belonging the kernel to be displayed in the process list. (This is a toggle key.)
`H`	Hide user threads: on systems that represent them differently than ordinary processes (such as recent NPTL-based systems), this can hide threads from userspace processes in the process list. (This is a toggle key.)
`p`	Show full paths to running programs, where applicable. (This is a toggle key.)
`Ctrl-L`	Rfresh the screen.
`F1`	See this help menu.
`h`	Same as above.
`?`	Again, same as above.
`F10`	Quit htop
`q`	Exit htop (same as above)

How to get help about htop

Simply pass the --help option. For example:
htop --help man htop

Conclusion

This page showed you how to install and use htop on RHEL 8. For more information see htop home page here.

This entry is 4 of 11 in the htop Tutorial series. Keep reading the rest of the series:

Posted by: Vivek Gite

The author is the creator of nixCraft and a seasoned sysadmin, DevOps engineer, and a trainer for the Linux operating system/Unix shell scripting. Get the latest tutorials on SysAdmin, Linux/Unix and open source topics via RSS/XML feed or weekly email newsletter.