What is htop Command Line Tool
This article explains what htop is, a popular interactive system monitoring utility for Unix-like operating systems. It covers its core features, how it improves upon the classic top command, and provides resource links, including the htop Command line tool documentation website, to help you monitor and manage system processes efficiently.
Understanding htop
htop is an open-source, cross-platform interactive
process viewer and system monitor designed for the command line. It
provides a real-time, color-coded overview of your system’s resource
usage, including CPU activity, memory consumption, swap space, and
running tasks. System administrators and developers use it to quickly
diagnose performance bottlenecks and manage running applications.
Key Features of htop
Unlike the traditional top command, htop
offers several advanced features:
- Interactive Interface: You can scroll vertically to view the full list of processes and horizontally to see entire command lines.
- Mouse Support: It supports mouse clicks for navigating menus, selecting processes, and sorting columns.
- Easy Process Management: You can kill or re-prioritize (nice) processes directly from the interface without typing their Process IDs (PIDs).
- Visual Resource Bars: CPU cores, RAM, and swap usage are displayed using intuitive, colored progress bars.
Basic Navigation and Shortcuts
The bottom of the htop interface displays a functional
menu mapped to your keyboard’s function keys:
- F1 (Help): Opens the help menu.
- F2 (Setup): Customizes the display, colors, and columns.
- F3 (Search): Searches for a specific process by name.
- F4 (Filter): Filters the process list.
- F5 (Tree): Toggles tree view to show parent-child process relationships.
- F6 (Sort): Sorts processes by criteria like CPU%, MEM%, or PID.
- F9 (Kill): Sends signals (like SIGKILL) to terminate selected processes.
- F10 (Quit): Exits the program.
For a deeper dive into advanced configurations, keyboard shortcuts, and detailed installation guides across different operating systems, visit the official htop Command line tool documentation website.