htop Command: Tutorial & Examples
Monitoring system resources
htop command is an interactive process viewer, similar to the
command but with a more user-friendly interface and additional features. It not only shows the basic system information
such as CPU usage, memory usage, and load averages, but also provides a real-time, colorful, easy-to-read overview of
your system's running processes.
In a nutshell,
htop gathers information from the
/proc directory and presents it in a
human-readable format. The
/proc directory is a virtual filesystem in Linux that provides
process and kernel information to userspace.
htop is Important
htop offers several advantages over traditional
htopprovides a full list of processes running, instead of the top resource-consuming processes.
- It allows for scrolling the list vertically and horizontally to see all processes and complete command lines.
- In 'htop' you don’t need to remember process IDs to kill a process, you can simply scroll to select a process, then press the F9 key.
htopsupports mouse operation,
Examples of Using
To start using
htop, you simply need to type
htop at the shell prompt. Here are some examples
of how to use
This command will start
htop on your terminal.
htop -u username
This command will filter the process list to include only those owned by the specified user.
htop -p 123,456,789
This command will monitor only the processes with the specified process IDs.
htop output is divided into three sections:
- The first section provides statistics about your system, like the usage of CPU, Memory, and Swap.
- The second section contains a list of all the processes running on your system.
- The third section has a footer menu with options that you can use to manage processes, filter the list, or exit the program.
Here's an example of what
htop output might look like:
1 [||||||| 17.2%] Tasks: 33, 57 thr; 2 running
2 [|||||||| 20.2%] Load average: 0.08 0.02 0.01
Mem[||||||||||||||||||||||||||||| 972M/3.86G] Uptime: 00:11:22
PID USER PRI NI VIRT RES SHR S CPU% MEM% TIME+ Command
1084 alan 20 0 657M 5372 3848 R 6.2 0.1 0:00.18 htop
htop command is an excellent tool for monitoring system resources and managing processes. Its user-friendly
interface and robust features make it an essential tool for every Linux system administrator. Take the time to get
htop and it will make your life a whole lot easier when you need to diagnose and resolve