How to install htop on FreeBSD

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I am a new user of FreeBSD operating system. How do I install htop on FreeBSD using the pkg command?

htop is nothing but Interactive process viewer for FreeBSD based system. 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 FreeBSD using command line options.

How to install htop on FreeBSD using pkg

The procedure for installing htop FreeBSD is as follows:

  1. Open the terminal window.
  2. For remote FreeBSD server login using ssh command.
  3. Execute pkg search htop command to search for htop on FreeBSD
  4. Run sudo pkg install htop to install htop in FreeBSD

Let us see all steps and examples in details.

FreeBSD install htop

It is important that you know how to search for any packages. Therefore type the following command to search for htop package using pkg command:
pkg search htop
Sample outputs:

htop-2.2.0_1                   Better top(1) - interactive process viewer

Find information about htop package

Run the following command:
pkg search -f htop
Sample outputs:

htop-2.2.0_1
Name           : htop
Version        : 2.2.0_1
Origin         : sysutils/htop
Architecture   : FreeBSD:12:amd64
Prefix         : /usr/local
Repository     : FreeBSD [pkg+http://pkg.FreeBSD.org/FreeBSD:12:amd64/quarterly]
Categories     : sysutils
Licenses       : GPLv2
Maintainer     : gaod@hychen.org
WWW            : https://hisham.hm/htop/
Comment        : Better top(1) - interactive process viewer
Options        :
	LSOF           : on
Annotations    :
	FreeBSD_version: 1200086
Flat size      : 160KiB
Pkg size       : 64.4KiB
Description    :
htop is an enhanced version of top, the interactive process viewer,
which can display the list of processes in a tree form.
 
Comparison between 'htop' and 'top'
 
	* In 'htop' you can scroll the list vertically and horizontally
	to see all processes and full command lines.
	* In 'top' you are subject to a delay for each unassigned
	key you press (especially annoying when multi-key escape
	sequences are triggered by accident).
	* 'htop' starts faster ('top' seems to collect data for a while
	before displaying anything).
	* In 'htop' you don't need to type the process number to
	kill a process, in 'top' you do.
	* In 'htop' you don't need to type the process number or
	the priority value to renice a process, in 'top' you do.
	* In 'htop' you can kill multiple processes at once.
	* 'top' is older, hence, more tested.
 
WWW: https://hisham.hm/htop/

Installing htop on FreeBSD

First, make sure you system is up to date:
sudo pkg update
sudo pkg upgrade

Finally, run the following to install htop on FreeBSD:
sudo pkg install htop

Install htop on FreeBSD using pkg command
Installing htop on FreeBSD

How to use htop command

The syntax is:
htop
htop [options]
htop [options] arg

Running htop on FreeBSD Unix server
htop in action

Press F10 or q to quit htop session.

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

FreeBSD htop keyboard shortcut keys

The following commands are supported while in htop:

CommandDescription
Up arrow keySelect (highlight) the previous process in the process list. Scroll the list if necessary.
Down arrow keySelect (highlight) the next process in the process list. Scroll the list if necessary.
Left arrow keyScroll the process list left.
Right arrow keyScroll the process list right.
PgUp, PgDnScroll the process list up or down one window.
HomeScroll to the top of the process list and select the first process.
EndScroll to the bottom of the process list and select the last process.
sTrace 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.
lDisplay open files for a process: if lsof(1) is installed, pressing this key will display the list of file descriptors opened by the process.

Other keyboard shortcuts

uShow only processes owned by a specified user.
MSort by memory usage (top compatibility key).
PSort by processor usage (top compatibility key).
TSort 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.
KHide kernel threads: prevent the threads belonging the kernel to be displayed in the process list. (This is a toggle key.)
HHide 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.)
pShow full paths to running programs, where applicable. (This is a toggle key.)
Ctrl-LRfresh the screen.
F1See this help menu.

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 FreeBSD Unix server. It has many more option. Hence, see the htop home page online here or read man page.

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.

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