bottom/README.md

bottom

A cross-platform graphical process/system monitor with a customizable interface and a multitude of features. Supports Linux, macOS, and Windows. Inspired by both gtop and gotop.

Theme based on gruvbox (--color gruvbox). Font is IBM Plex Mono, terminal is Kitty.

Note: If you are reading this on the master branch, then it may refer to in-development or un-released features/changes. Please refer to release branch or crates.io for the most up-to-date release documentation.

Table of Contents

• Support
  • Compatibility
  • Other known platform-specific issues
• Installation
  • Manually
  • Nightly
  • Cargo
  • AUR
  • Debian
  • Fedora/CentOS
  • Gentoo
  • Nix
  • Solus
  • Homebrew
  • Scoop
  • Chocolatey
  • winget
  • Auto-completion
• Usage
  • Flags
  • Keybindings
    • General
    • Process bindings
    • Process search bindings
  • Process sort bindings
    • Battery bindings
    • Basic memory bindings
  • Process searching keywords
    • Supported search types
    • Supported comparison operators
    • Supported logical operators
    • Supported units
    • Other syntax
  • Mousebindings
    • General
    • CPU bindings
    • Process bindings
• Features
  • Processes
    • Process searching
    • Process sorting
    • Tree mode
  • Zoom
  • Expand
  • Basic mode
  • Config files
    • Config flags
    • Theming
    • Layout
    • Disk, temperature, and network filtering
  • Battery
• FAQ
• Contribution
  • Contributors
• Thanks

Support

Note that bottom is:

• Built and released using the most recent stable version of Rust
• Officially supports:
  • macOS (x86_64)
  • Linux (x86_64, i686, aarch64)
  • Windows (x86_64, i686)

Operating systems, versions of Rust, or platforms that are outside of this list are not currently officially supported - even if it is built, tested, or works - and I may not be able to fix bugs for these!

Compatibility

The current compatibility of widgets with operating systems from personal testing:

OS	CPU	Memory	Disks	Temperature	Processes/Search	Networks	Battery
Linux	✓	✓	✓	✓	✓	✓	✓
Windows	✓	✓	✓	? (seems to require elevated access)	✓	✓	✓ (seems to have issues with dual batteries)
macOS	✓	✓	✓	✓	✓ (requires sudo btm to show everything)	✓	✓

Other known platform-specific issues

• M1-based macOS devices may have issues with temperature sensors not returning anything.

• For now, WSL has an issue reporting total memory usage.

• WSL and WSL2 (as far as I know) cannot correctly report temperature sensors.

• WSL2 will not match Windows' own Task Manager, this appears to be due to how WSL2 works.

Installation

Manually

There are a few ways to go about doing this manually. If you do so, please build using the current stable release of Rust. For example:

# If required, update Rust on the stable channel
rustup update stable

# Clone and install the newest master version all via Cargo
cargo install --git https://github.com/ClementTsang/bottom

# Clone from master and install manually
git clone https://github.com/ClementTsang/bottom
cd bottom
cargo install --path .

# Download from releases and install
curl -LO https://github.com/ClementTsang/bottom/archive/0.6.0.tar.gz
tar -xzvf 0.6.0.tar.gz
cargo install --path .

Or, you can just download the binary from the latest release.

Nightly

You can install pre-release nightly versions here. Builds are generated every day at 00:00 UTC, based on the most recent commit on the master branch.

Cargo

# If required, update Rust on the stable channel
rustup update stable

cargo install bottom

# OR, --locked may be required due to how cargo install works
cargo install bottom --locked

AUR

Normal package found here, binary package found here:

yay -S bottom

# If you instead want a pre-built binary:
yay -S bottom-bin

Debian

A .deb file is provided on each release:

curl -LO https://github.com/ClementTsang/bottom/releases/download/0.6.0/bottom_0.6.0_amd64.deb
sudo dpkg -i bottom_0.6.0_amd64.deb

Fedora/CentOS

Available in COPR:

sudo dnf copr enable atim/bottom -y
sudo dnf install bottom

Gentoo

Available in dm9pZCAq overlay

sudo eselect repository enable dm9pZCAq
sudo emerge --sync dm9pZCAq
sudo emerge sys-process/bottom::dm9pZCAq

Nix

nix-env -i bottom

Solus

sudo eopkg it bottom

Homebrew

brew tap clementtsang/bottom
brew install bottom

# If you need to be more specific, use:
brew install clementtsang/bottom/bottom

Scoop

scoop install bottom

Chocolatey

Choco package located here. Since you cannot upload a new package while a previous one is being validated, the newest version of a release may take a while to appear.

choco install bottom

# Version number may be required for newer releases, if available:
choco install bottom --version=0.6.0

winget

You can find the packages here. Since validation of the package takes time, it may take a while to become available after a release.

winget install bottom

You can also manually do the same thing by going to the latest release and installing via the .msi file.

You can uninstall via Control Panel or Options in Windows.

Auto-completion

Shell completions are included in binary releases, and are generated in the same directory as the binary if bottom is manually built.

• For bash, move btm.bash to $XDG_CONFIG_HOME/bash_completion or /etc/bash_completion.d/.
• For fish, move btm.fish to $HOME/.config/fish/completions/.
• For zsh, move _btm to one of your $fpath directories.
• For PowerShell, add . _btm.ps1 to your PowerShell profile.

Some install scripts (i.e. AUR) will automatically do this for you.

Usage

Run using btm.

Flags

Use btm --help for more information.

        --autohide_time                        Temporarily shows the time scale in graphs.
    -b, --basic                                Hides graphs and uses a more basic look.
        --battery                              Shows the battery widget.
    -S, --case_sensitive                       Enables case sensitivity by default.
    -c, --celsius                              Sets the temperature type to Celsius.
        --color <COLOR SCHEME>                 Use a color scheme, use --help for supported values.
    -C, --config <CONFIG PATH>                 Sets the location of the config file.
    -u, --current_usage                        Sets process CPU% to be based on current CPU%.
    -t, --default_time_value <MS>              Default time value for graphs in ms.
        --default_widget_count <INT>           Sets the n'th selected widget type as the default.
        --default_widget_type <WIDGET TYPE>    Sets the default widget type, use --help for more info.
        --disable_advanced_kill                Hides advanced options to stop a process on Unix-like systems.
        --disable_click                        Disables mouse clicks.
    -m, --dot_marker                           Uses a dot marker for graphs.
    -f, --fahrenheit                           Sets the temperature type to Fahrenheit.
    -g, --group                                Groups processes with the same name by default.
    -h, --help                                 Prints help information.  Use --help for more info.
    -a, --hide_avg_cpu                         Hides the average CPU usage.
        --hide_table_gap                       Hides the spacing between table headers and entries.
        --hide_time                            Completely hides the time scaling.
    -k, --kelvin                               Sets the temperature type to Kelvin.
    -l, --left_legend                          Puts the CPU chart legend to the left side.
        --mem_as_value                         Defaults to showing process memory usage by value.
        --network_use_binary_prefix            Displays the network widget with binary prefixes.
        --network_use_bytes                    Displays the network widget using bytes.
        --network_use_log                      Displays the network widget with a log scale.
        --process_command                      Show processes as their commands by default.
    -r, --rate <MS>                            Sets a refresh rate in ms.
    -R, --regex                                Enables regex by default.
        --show_table_scroll_position           Shows the scroll position tracker in table widgets.
    -d, --time_delta <MS>                      The amount in ms changed upon zooming.
    -T, --tree                                 Defaults to showing the process widget in tree mode.
        --use_old_network_legend               DEPRECATED - uses the older network legend.
    -V, --version                              Prints version information.
    -W, --whole_word                           Enables whole-word matching by default.

Keybindings

General

q, Ctrl-c	Quit
Esc	Close dialog windows, search, widgets, or exit expanded mode
Ctrl-r	Reset display and any collected data
f	Freeze/unfreeze updating with new data
Ctrl-Left Shift-Left H A	Move widget selection left
Ctrl-Right Shift-Right L D	Move widget selection right
Ctrl-Up Shift-Up K W	Move widget selection up
Ctrl-Down Shift-Down J S	Move widget selection down
Left, h	Move left within widget
Down, j	Move down within widget
Up,k	Move up within widget
Right, l	Move right within widget
?	Open help menu
gg, Home	Jump to the first entry
Shift-g, End	Jump to the last entry
e	Toggle expanding the currently selected widget
+	Zoom in on chart (decrease time range)
-	Zoom out on chart (increase time range)
=	Reset zoom

Process bindings

dd	Kill the selected process
c	Sort by CPU usage, press again to reverse sorting order
m	Sort by memory usage, press again to reverse sorting order
p	Sort by PID name, press again to reverse sorting order
n	Sort by process name, press again to reverse sorting order
Tab	Group/un-group processes with the same name
Ctrl-f, /	Open process search widget
P	Toggle between showing the full command or just the process name
s, F6	Open process sort widget
I	Invert current sort
%	Toggle between values and percentages for memory usage
t, F5	Toggle tree mode

Process search bindings

Tab	Toggle between searching by PID or name
Esc	Close the search widget (retains the filter)
Ctrl-a	Skip to the start of the search query
Ctrl-e	Skip to the end of the search query
Ctrl-u	Clear the current search query
Ctrl-w	Delete a word behind the cursor
Ctrl-h	Delete the character behind the cursor
Backspace	Delete the character behind the cursor
Delete	Delete the character at the cursor
Alt-c, F1	Toggle matching case
Alt-w, F2	Toggle matching the entire word
Alt-r, F3	Toggle using regex
Left	Move cursor left
Right	Move cursor right

Process sort bindings

Down, j	Scroll down in list
Up, k	Scroll up in list
Mouse scroll	Scroll through sort widget
Esc	Close the sort widget
Enter	Sort by current selected column

Battery bindings

Left, Alt-h	Go to the next battery
Right, Alt-l	Go to the previous battery

Basic memory bindings

%	Toggle between values and percentages for memory usage

Process searching keywords

• None of the keywords are case sensitive.
• Use brackets to logically group together parts of the search.
• Furthermore, if you want to search a reserved keyword, surround the text in quotes - for example, "or" or "(sd-pam)" would be a valid search:

Supported search types

Keywords	Example	Description
	btm	Matches by process or command name; supports regex
pid	pid=1044	Matches by PID; supports regex
cpu, cpu%	cpu > 0.5	Matches the CPU column; supports comparison operators
memb	memb > 1000 b	Matches the memory column in terms of bytes; supports comparison operators
mem, mem%	mem < 0.5	Matches the memory column in terms of percent; supports comparison operators
read, r/s	read = 1 mb	Matches the read/s column in terms of bytes; supports comparison operators
write, w/s	write >= 1 kb	Matches the write/s column in terms of bytes; supports comparison operators
tread, t.read	tread <= 1024 gb	Matches he total read column in terms of bytes; supports comparison operators
twrite, t.write	twrite > 1024 tb	Matches the total write column in terms of bytes; supports comparison operators
user	user=root	Matches by user; supports regex
state	state=running	Matches by state; supports regex

Supported comparison operators

Keywords	Description
=	Checks if the values are equal
>	Checks if the left value is strictly greater than the right
<	Checks if the left value is strictly less than the right
>=	Checks if the left value is greater than or equal to the right
<=	Checks if the left value is less than or equal to the right

Supported logical operators

Note that the and operator takes precedence over the or operator.

Keywords	Usage	Description
and, &&, <Space>	<CONDITION 1> and/&&/<Space> <CONDITION 2>	Requires both conditions to be true to match
or, ||	<CONDITION 1> or/|| <CONDITION 2>	Requires at least one condition to be true to match

Supported units

Keywords	Description
B	Bytes
KB	Kilobytes
MB	Megabytes
GB	Gigabytes
TB	Terabytes
KiB	Kibibytes
MiB	Mebibytes
GiB	Gibibytes
TiB	Tebibytes

Other syntax

Keywords	Usage	Description
()	(<CONDITION 1> AND <CONDITION 2>) OR <CONDITION 3>	Group together a condition

Mousebindings

General

Scroll	Table: Scroll Chart: Zooms in or out by scrolling up or down respectively
Click	Selects the clicked widget, table entry, dialog option, or tab. Can be disabled via options/flags.

CPU bindings

Scroll	Scrolling over an CPU core/average shows only that entry on the chart

Process bindings

Click on process entry	If in tree mode and you click on a selected entry, it toggles whether the branch is expanded or not
Click on table header	Sorts the widget by that column, or inverts the sort if already selected

Features

As yet another process/system visualization and management application, bottom supports the typical features:

• CPU usage visualization, on an average and per-core basis

• RAM and swap usage visualization

• Network visualization for receiving and transmitting

• Display information about disk capacity and I/O per second

• Display temperatures from sensors

• Display information regarding processes, like CPU, memory, I/O usage, user, and process state

• Process management (well, if process killing is all you need)

It also aims to be:

• Lightweight

• Cross-platform - supports 64-bit Linux, Windows, and macOS

In addition, bottom also currently has the following features:

Processes

Process searching

On any process widget, hit / to bring up a search bar. If the layout has multiple process widgets, note this search is independent of other widgets.

By default, just typing in something will search by process name:

This simple search can be refined by matching by case, matching the entire word, or by using regex:

Now let's say you want to search for two things - luckily, we have the AND and OR logical operators:

Furthermore, one is able to refine their searches by CPU usage, memory usage, PID, and more. For example:

You can see all available keywords and query options here.

Process sorting

You can sort the processes list by any column you want by pressing s while on a process widget:

Tree mode

Use t or F5 to toggle tree mode in a process widget. This is somewhat similar to htop's tree mode.

Sorting works as well, but it is done per groups of siblings. For example, by CPU%:

You can also still filter processes. Branches that entirely do not match the query are pruned out, but if a branch contains an element that does match the query, any non-matching elements will instead just be greyed out, so the tree structure is still maintained:

Zoom

Using the +/- keys or the scroll wheel will move the current time intervals of the currently selected widget, and = to reset the zoom levels to the default. Widgets can hold different time intervals independently. These time intervals can be adjusted using the -t/--default_time_value and -d/--time_delta options, or their corresponding config options.

Expand

Only care about one specific widget? You can go to that widget and hit e to make that widget expand and take up the entire drawing area. You can minimize this expanded widget with Esc or pressing e again.

Basic mode

Using the -b or --basic_mode (or their corresponding config options) will open bottom in basic mode. There are no charts or expanded mode when using this, and tables are condensed such that only one table is displayed at a time.

Note custom layouts are currently not available when this is used.

Config files

bottom supports reading from a config file to customize its behaviour and look. By default, bottom will look at (based on dirs):

OS	Location
~/.config/bottom/bottom.toml or $XDG_CONFIG_HOME/bottom/bottom.toml	Linux
$HOME/Library/Application Support/bottom/bottom.toml	macOS
C:\Users\<USER>\AppData\Roaming\bottom\bottom.toml	Windows

Note that if a config file does not exist at either the default location or the passed in location via -C or --config, one is automatically created with no settings applied.

Config flags

The following options can be set under [flags] to achieve the same effect as passing in a flag on runtime. Note that if a flag is given, it will override the config file.

These are the following supported flag config values, which correspond to the flag of the same name described in Flags:

Field	Type	Functionality
hide_avg_cpu	Boolean	Hides the average CPU usage.
dot_marker	Boolean	Uses a dot marker for graphs.
left_legend	Boolean	Puts the CPU chart legend to the left side.
current_usage	Boolean	Sets process CPU% to be based on current CPU%.
group_processes	Boolean	Groups processes with the same name by default.
case_sensitive	Boolean	Enables case sensitivity by default.
whole_word	Boolean	Enables whole-word matching by default.
regex	Boolean	Enables regex by default.
basic	Boolean	Hides graphs and uses a more basic look.
use_old_network_legend	Boolean	DEPRECATED - uses the older network legend.
battery	Boolean	Shows the battery widget.
rate	Unsigned Int (represents milliseconds)	Sets a refresh rate in ms.
default_time_value	Unsigned Int (represents milliseconds)	Default time value for graphs in ms.
time_delta	Unsigned Int (represents milliseconds)	The amount in ms changed upon zooming.
temperature_type	String (one of ["k", "f", "c", "kelvin", "fahrenheit", "celsius"])	Sets the temperature unit type.
default_widget_type	String (one of ["cpu", "proc", "net", "temp", "mem", "disk"], same as layout options)	Sets the default widget type, use --help for more info.
default_widget_count	Unsigned Int (represents which default_widget_type)	Sets the n'th selected widget type as the default.
disable_click	Boolean	Disables mouse clicks.
color	String (one of ["default", "default-light", "gruvbox", "gruvbox-light", "nord", "nord-light"])	Use a color scheme, use --help for supported values.
mem_as_value	Boolean	Defaults to showing process memory usage by value.
tree	Boolean	Defaults to showing the process widget in tree mode.
show_table_scroll_position	Boolean	Shows the scroll position tracker in table widgets.
process_command	Boolean	Show processes as their commands by default.
disable_advanced_kill	Boolean	Hides advanced options to stop a process on Unix-like systems.
network_use_binary_prefix	Boolean	Displays the network widget with binary prefixes.
network_use_bytes	Boolean	Displays the network widget using bytes.
network_use_log	Boolean	Displays the network widget with a log scale.

Theming

The config file can be used to set custom colours for parts of the application under the [colors] object. The following labels are customizable with strings that are hex colours, RGB colours, or specific named colours.

Supported named colours are one of the following strings: Reset, Black, Red, Green, Yellow, Blue, Magenta, Cyan, Gray, DarkGray, LightRed, LightGreen, LightYellow, LightBlue, LightMagenta, LightCyan, White.

Labels	Details	Example
Table header colours	Colour of table headers	table_header_color="255, 255, 255"
CPU colour per core	Colour of each core. Read in order.	cpu_core_colors=["#ffffff", "white", "255, 255, 255"]
Average CPU colour	The average CPU color	avg_cpu_color="White"
All CPUs colour	The colour for the "All" CPU label	all_cpu_color="White"
RAM	The colour RAM will use	ram_color="#ffffff"
SWAP	The colour SWAP will use	swap_color="#ffffff"
RX	The colour rx will use	rx_color="#ffffff"
TX	The colour tx will use	tx_color="#ffffff"
Widget title colour	The colour of the label each widget has	widget_title_color="#ffffff"
Border colour	The colour of the border of unselected widgets	border_color="#ffffff"
Selected border colour	The colour of the border of selected widgets	highlighted_border_color="#ffffff"
Text colour	The colour of most text	text_color="#ffffff"
Graph colour	The colour of the lines and text of the graph	graph_color="#ffffff"
Cursor colour	The cursor's colour	cursor_color="#ffffff"
Selected text colour	The colour of text that is selected	scroll_entry_text_color="#ffffff"
Selected text background colour	The background colour of text that is selected	scroll_entry_bg_color="#ffffff"
High battery level colour	The colour used for a high battery level (100% to 50%)	high_battery_color="green"
Medium battery level colour	The colour used for a medium battery level (50% to 10%)	medium_battery_color="yellow"
Low battery level colour	The colour used for a low battery level (10% to 0%)	low_battery_color="red"

Layout

bottom supports customizable layouts via the config file. Currently, layouts are controlled by using TOML objects and arrays.

For example, given the sample layout:

[[row]]
  [[row.child]]
  type="cpu"
[[row]]
    ratio=2
    [[row.child]]
      ratio=4
      type="mem"
    [[row.child]]
      ratio=3
      [[row.child.child]]
        type="temp"
      [[row.child.child]]
        type="disk"

This would give a layout that has two rows, with a 1:2 ratio. The first row has only the CPU widget. The second row is split into two columns with a 4:3 ratio. The first column contains the memory widget. The second column is split into two rows with a 1:1 ratio. The first is the temperature widget, the second is the disk widget.

This is what the layout would look like when run:

Each [[row]] represents a row in the layout. A row can have any number of child values. Each [[row.child]] represents either a column or a widget. A column can have any number of child values as well. Each [[row.child.child]] represents a widget. A widget is represented by having a type field set to a string.

The following type values are supported:

"cpu"	CPU chart and legend
"mem", "memory"	Memory chart
"net", "network"	Network chart and legend
"proc", "process", "processes"	Process table and search
"temp", "temperature"	Temperature table
"disk"	Disk table
"empty"	An empty space
"batt", "battery"	Battery statistics

Each component of the layout accepts a ratio value. If this is not set, it defaults to 1.

For an example, look at the default config, which contains the default layout.

Furthermore, you can have duplicate widgets. This means you could do something like:

[[row]]
  ratio=1
  [[row.child]]
  type="cpu"
  [[row.child]]
  type="cpu"
  [[row.child]]
  type="cpu"
[[row]]
  ratio=1
  [[row.child]]
  type="cpu"
  [[row.child]]
  type="empty"
  [[row.child]]
  type="cpu"
[[row]]
  ratio=1
  [[row.child]]
  type="cpu"
  [[row.child]]
  type="cpu"
  [[row.child]]
  type="cpu"

and get the following CPU donut:

Disk, temperature, and network filtering

You can hide specific disks, temperature sensors, and networks by name in the config file via disk_filter and mount_filter, temp_filter, and net_filter respectively. Regex (regex = true), case-sensitivity (case_sensitive = true), and matching only if the entire word matches (whole_word = true) are supported, but are off by default. Filters default to denying entries that match and can be toggled by setting is_list_ignored to false in the config file.

For example, here's the disk widget with no filter:

The following in the config file would filter out some entries by disk name:

[disk_filter]
is_list_ignored = true
list = ["/dev/sda"]
regex = true
case_sensitive = false
whole_word = false

If there are two potentially conflicting filters (i.e. when you are using both a disk and mount filter), the filter that explicitly allows an entry takes precedence over a filter that explicitly denies one. So for example, let's say I set a disk filter accepting anything with /dev/sda, but deny anything with /mnt/.* or /. So to do so, I write in the config file:

[disk_filter]
is_list_ignored = false
list = ["/dev/sda"]
regex = true
case_sensitive = false
whole_word = false

[mount_filter]
is_list_ignored = true
list = ["/mnt/.*", "/"]
regex = true
case_sensitive = false
whole_word = true

Which gives me:

Battery

You can get battery statistics (charge, time to fill/discharge, consumption in watts, and battery health) via the battery widget.

Since this is only useful for devices like laptops, it is off by default. You can either enable the widget in the default layout via the --battery flag, or by specifying the widget in a layout:

FAQ

Please see the FAQ for answers to frequently asked questions.

Contribution

Contribution is always welcome! Please take a look at CONTRIBUTING.md for details on how to help.

Contributors

Thanks to all contributors (emoji key):

Marcin Wojnarowski 💻 📦	Mahmoud Al-Qudsi 💻	Andy 💻	Kim Brose 💻	Sven-Hendrik Haase 📖	Artem Polishchuk 📦 📖	Trung Lê 📦 🚇
dm9pZCAq 📦 📖	Lukas Rysavy 💻	Erlend Hamberg 💻	Frederick Zhang 💻	pvanheus 💻	Zeb Piasecki 💻	georgybog 📖

Thanks

• This project is very much inspired by gotop, its successor ytop, and gtop.

• Basic mode is heavily inspired by htop's design.

• This application was written with many, many libraries, and built on the work of many talented people. This application would be impossible without their work. I used to thank them all individually but the list got too large...

• And of course, thanks to all contributors!