bottom

A graphical top clone, written in Rust. Inspired by both gtop and gotop

Features

Features of bottom include:

• CPU widget to show a visual representation of per-core usage. Average CPU display also exists.

• Memory widget to show a visual representation of both RAM and SWAP usage.

• Networks widget to show a log-based visual representation of network usage.

• Sortable and searchable process widget. Searching supports regex, and you can search by PID and process name.

• Disks widget to display usage and I/O per second.

• Temperature widget to monitor detected sensors in your system.

The compatibility of each widget and operating systems are, as of version 0.1.0, as follows:

OS/Widget	CPU	Memory	Disks	Temperature	Processes	Networks
Linux (tested on Arch Linux)	✓	✓	✓	✓	✓	✓
Windows (tested on Windows 10)	✓	✓	✓	Currently not working	✓	Partially supported (total RX/TX unavailable)
macOS	Untested	Untested	Untested	Untested	Untested	Untested

Installation

In all cases you can install the in-development version by cloning and using cargo build --release. Note this is built and tested with Rust Stable (1.40.0 as of writing). You can also get release versions using cargo install bottom, or manually building from the Releases page by downloading and building.

Linux

Other installation methods based on distros are as follows:

Arch Linux

You can get the release versions from the AUR by installing bottom.

Windows

You may need to install a font like FreeMono and use a terminal like cmder for font support to work properly, unfortunately.

macOS

macOS support will hopefully come soon^TM. I've had reports of it working already, but I cannot personally confirm whether things are working until then.

Usage

Run using btm.

Command line options

• -h, --help shows the help screen and exits.

• -a, --avgcpu enables also showing the average CPU usage in addition to per-core CPU usage.

• -m, --dot-marker uses a dot marker instead of the default braille marker.

• -c, --celsius displays the temperature type in Celsius. This is the default.

• -f, --fahrenheit displays the temperature type in Fahrenheit.

• -k, --kelvin displays the temperature type in Kelvin.

• -v, --version displays the version number and exits.

• -d, --debug enables debug logging.

• -r <RATE>, --rate <RATE> will set the refresh rate in milliseconds. Lowest it can go is 250ms, the highest it can go is 2¹²⁸ - 1. Defaults to 1000ms, and lower values may take more resources due to more frequent polling of data, and may be less accurate in some circumstances.

• -l, --left_legend will move external table legends to the left side rather than the right side. Right side is default.

• -u, --current_usage will make a process' CPU usage be based on the current total CPU usage, rather than assuming 100% CPU usage. Only affects Linux for now.

• -g, --group will group together processes with the same name by default (equivalent to pressing Tab).

• -i, --case_insensitive will default to not matching cases when searching processes.

Keybindings

General

• q, Ctrl-c to quit. Note if you are currently in the search widget, q will not work so you can still type.

• Ctrl-r to reset the screen and reset all collected data.

• f to freeze the screen from updating with new data. Press f again to unfreeze. Note that monitoring will still continue in the background.

• Ctrl-Up or Ctrl-k, Ctrl-Down or Ctrl-j, Ctrl-Left or Ctrl-h, Ctrl-Right or Ctrl-l to navigate between widgets.

• Esc to close a dialog window.

• ? to get a help screen explaining the controls. Note all controls except Esc to close the dialog will be disabled while this is open.

Scrollable Tables

• Up or k and Down or j scrolls through the list if the widget is a table (Temperature, Disks, Processes).

• gg or Home to jump to the first entry of the current table.

• G (Shift-g) or End to jump to the last entry of the current table.

Processes

• dd to kill the selected process

• c to sort by CPU usage. Sorts in descending order by default. Press again to reverse sorting order.

• m to sort by memory usage. Sorts in descending order by default. Press again to reverse sorting order.

• p to sort by PID. Sorts in ascending order by default. Press again to reverse sorting order.

• n to sort by process name. Sorts in ascending order by default. Press again to reverse sorting order.

• Tab to group together processes with the same name. Disables PID sorting. dd will now kill all processes covered by that name.

• Ctrl-f or / to open the search widget.

Search Widget

• Ctrl-p or Ctrl-n to switch between searching for PID and name respectively.

• Ctrl-s to toggle between a simple search and a regex search.

• Ctrl-a and Ctrl-e to jump to the start and end of the search bar respectively.

• Esc or Ctrl-f to close.

• Left and Right arrow keys to move the cursor within the search bar.

Note that q is disabled while in the search widget.

Mouse actions

• Scrolling with the mouse will scroll through the currently selected list if the widget is a scrollable table.

Thanks, kudos, and all the like

• This project is very much inspired by both gotop and gtop.

• This application was written with the following libraries:

  • chrono
  • clap
  • crossterm
  • failure
  • fern
  • futures-rs
  • futures-timer
  • heim
  • log
  • sysinfo
  • tokio
  • tui-rs
  • winapi
  • lazy_static