bottom/README.md

# bottom

[![Build Status](https://travis-ci.com/ClementTsang/bottom.svg?token=1wvzVgp94E1TZyPNs8JF&branch=master)](https://travis-ci.com/ClementTsang/bottom)
[![crates.io link](https://img.shields.io/crates/v/bottom.svg)](https://crates.io/crates/bottom)
[![tokei](https://tokei.rs/b1/github/ClementTsang/bottom?category=code)](https://github.com/ClementTsang/bottom)
[![All Contributors](https://img.shields.io/badge/all_contributors-2-orange.svg?style=flat-square)](#contributors-)

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](https://github.com/aksakalli/gtop) and [gotop](https://github.com/cjbassi/gotop).

![Quick demo recording showing off searching, maximizing, and process killing.](assets/summary_and_search.gif) _Theme based on [gruvbox](https://github.com/morhetz/gruvbox) (see [sample config](./sample_configs/demo_config.toml))._ Recorded on version 0.2.0.

This documentation is relevant to version 0.3.0. Please refer to [release branch](https://github.com/ClementTsang/bottom/tree/release/README.md) or [crates.io](https://crates.io/crates/bottom) for the most up-to-date _release_ version.

## Table of Contents

- [Installation](#installation)
  - [Manual](#manual)
  - [Cargo](#cargo)
  - [AUR](#aur)
  - [Debian (and Debian-based)](#debian)
  - [Homebrew](#homebrew)
  - [Scoop](#scoop)
  - [Chocolatey](#chocolatey)
- [Usage](#usage)
  - [Flags](#flags)
  - [Options](#options)
- [Keybindings](#keybindings)
  - [General](#general)
  - [CPU bindings](#cpu-bindings)
  - [Process bindings](#process-bindings)
  - [Process search bindings](#process-search-bindings)
- [Features](#features)
  - [Process filtering](#process-filtering)
  - [Zoom](#zoom)
  - [Maximizing](#maximizing)
  - [Basic mode](#basic-mode)
  - [Config files](#config-files)
    - [Config flags](#config-flags)
    - [Theming](#theming)
    - [Layout](#layout)
  - [Compatibility](#compatibility)
- [Contribution](#contribution)
- [Thanks](#thanks)

## Installation

Note that binaries are built on the stable version of Rust, and I mainly test and release for 64-bit.

### Manual

A few ways to go about doing this:

```bash
# Clone and install all via Cargo
cargo install --git https://github.com/ClementTsang/bottom

# Clone 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/releases/download/0.3.0/bottom_source_code.tar.gz
tar -xzvf bottom_source_code.tar.gz
cargo install --path .
```

### Cargo

```bash
cargo install bottom
```

### AUR

```bash
yay bottom

# If you instead want the binary version:
yay bottom-bin
```

### Debian

A `.deb` file is provided on each [release](https://github.com/ClementTsang/bottom/releases/latest):

```bash
curl -LO https://github.com/ClementTsang/bottom/releases/download/0.3.0/bottom_0.3.0_amd64.deb
sudo dpkg -i bottom_0.3.0_amd64.deb
```

### Homebrew

```bash
brew tap clementtsang/bottom
brew install bottom

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

### Scoop

```bash
scoop install bottom
```

### Chocolatey

```bash
choco install bottom

# Version number may be required for newer releases:
choco install bottom --version=0.3.0
```

## Usage

Run using `btm`.

### Flags

```
-h, --help                      Prints help information, including flags and options
-a, --avg_cpu                   Shows the average CPU usage in addition to per-core
-m, --dot-marker                Uses a dot marker instead of the default braille marker
-c, --celsius                   Displays the temperature type in Celsius [default]
-f, --fahrenheit                Displays the temperature type in Fahrenheit
-k, --kelvin                    Displays the temperature type in Kelvin
-l, --left_legend               Displays the CPU legend to the left rather than the right
-u, --current_usage             Sets process CPU usage to be based on current total CPU usage
-g, --group                     Groups together processes with the same name by default
-S, --case_sensitive            Search defaults to matching cases
-W, --whole                     Search defaults to searching for the whole word
-R, --regex                     Search defaults to using regex
-s, --show_disabled_data        Shows disabled CPU entries in the CPU legend
-b, --basic                     Enables basic mode, removing charts and condensing data
```

### Options

```
-r, --rate <MS>                 Set the refresh rate in milliseconds [default: 1000]
-C, --config <PATH>             Use the specified config file; if it does not exist it is automatically created
-t, --default_time_value <MS>   Sets the default time interval for charts in milliseconds [default: 60000]
-d, --time_delta <MS>           Sets the default amount each zoom in/out action changes by in milliseconds [default: 15000]
```

### Keybindings

#### General

|                                                    |                                                                                                |
| -------------------------------------------------- | ---------------------------------------------------------------------------------------------- |
| `q`, `Ctrl-c`                                      | Quit bottom                                                                                    |
| `Esc`                                              | Close dialog windows, search, widgets, or exit maximized mode                                  |
| `Ctrl-r`                                           | Reset display and any collected data                                                           |
| `f`                                                | Freeze/unfreeze updating with new data                                                         |
| `Ctrl`-arrow key<br>`Shift`-arrow key<br>`H/J/K/L` | Move to a different widget (on macOS some keybindings may conflict)                            |
| `Up`,`k`                                           | Scroll up in tables                                                                            |
| `Down`, `j`                                        | Scroll down in tables                                                                          |
| `?`                                                | Open help menu                                                                                 |
| `gg`, `Home`                                       | Jump to the first entry of a table                                                             |
| `Shift-g`, `End`                                   | Jump to the last entry of a table                                                              |
| `Enter`                                            | Maximize widget                                                                                |
| `+`                                                | Zoom in on a chart                                                                             |
| `-`                                                | Zoom out on a chart                                                                            |
| `=`                                                | Reset zoom                                                                                     |
| Mouse scroll                                       | Table: Scrolls through the list<br>Chart: Zooms in or out by scrolling up or down respectively |

#### CPU bindings

|         |                                              |
| ------- | -------------------------------------------- |
| `/`     | Open filtering for showing certain CPU cores |
| `Space` | Toggle enabled/disabled cores                |
| `Esc`   | Exit filtering mode                          |

#### 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                                 |

#### 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          |
| `Alt-c`/`F1` | Toggle matching case                         |
| `Alt-w`/`F2` | Toggle matching the entire word              |
| `Alt-r`/`F3` | Toggle using regex                           |

## Features

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

- CPU, memory, and network usage visualization

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

- Display temperatures from sensors

- Process management (process killing _is_ all you need, right?)

It also aims to be:

- Lightweight

- Cross-platform - supports Linux, Windows, and macOS

In addition to these things, bottom also currently has the following features:

### Process filtering

On any process widget, hit `/` to bring up a search bar. If your layout has
multiple process widgets, note this search is independent of other widgets. Searching
supports regex, matching case, and matching entire words. Use `Tab` to toggle between
searching by PID and by process name.

### Zoom

Using the `+`/`-` keys or the scroll wheel will move adjust the current time intervals of the currently selected widget.
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.

### Maximizing

Only care about the CPU widget right now? Then go to the widget and hit `Enter` to make it take
up the entire drawing area.

### 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.

![basic mode image](assets/basic_mode.png)

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 `~/.config/bottom/bottom.toml` or `C:\Users\<USER>\AppData\Roaming\bottom\bottom.toml` on Unix and Windows systems respectively.

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:
| Field | Type |
|------------------------|---------------------------------------------------------------------------------------|
| `avg_cpu` | Boolean |
| `dot_marker` | Boolean |
| `left_legend` | Boolean |
| `current_usage` | Boolean |
| `group_processes` | Boolean |
| `case_sensitive` | Boolean |
| `whole_word` | Boolean |
| `regex` | Boolean |
| `show_disabled_data` | Boolean |
| `basic` | Boolean |
| `rate` | Unsigned Int (represents milliseconds) |
| `default_time_value` | Unsigned Int (represents milliseconds) |
| `time_delta` | Unsigned Int (represents milliseconds) |
| `temperature_type` | String (one of ["k", "f", "c", "kelvin", "fahrenheit", "celsius"]) |
| `default_widget_type` | String (one of ["cpu", "proc", "net", "temp", "mem", "disk"], same as layout options) |
| `default_widget_count` | Unsigned Int (represents which `default_widget_type`) |

#### 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"`                                 |
| 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"`                       |

#### 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:

```toml
[[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:

![Sample layout](assets/sample_layout.png)

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 chart |
| `proc` | Process table and search |
| `net` | Network chart and legend |
| `temp` | Temperature table |
| `disk` | Disk table |
| `empty` | An empty space |

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](./sample_configs/default_config.toml), which contains the default layout.

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

```toml
[[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:
![CPU donut](./assets/cpu_layout.png)

### Compatibility

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

| OS      | CPU | Memory | Disks | Temperature | Processes/Search | Networks |
| ------- | --- | ------ | ----- | ----------- | ---------------- | -------- |
| Linux   | ✓   | ✓      | ✓     | ✓           | ✓                | ✓        |
| Windows | ✓   | ✓      | ✓     | ✗           | ✓                | ✓        |
| macOS   | ✓   | ✓      | ✓     | ✓           | ✓                | ✓        |

## Contribution

Contribution is always welcome - just submit a PR! Note that I currently develop and test on stable Rust.

Thanks to all contributors ([emoji key](https://allcontributors.org/docs/en/emoji-key)):

<!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
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<table>
  <tr>
    <td align="center"><a href="http://shilangyu.github.io"><img src="https://avatars3.githubusercontent.com/u/29288116?v=4" width="100px;" alt=""/><br /><sub><b>Marcin Wojnarowski</b></sub></a><br /><a href="https://github.com/ClementTsang/bottom/commits?author=shilangyu" title="Code">💻</a> <a href="#platform-shilangyu" title="Packaging/porting to new platform">📦</a></td>
    <td align="center"><a href="http://neosmart.net/"><img src="https://avatars3.githubusercontent.com/u/606923?v=4" width="100px;" alt=""/><br /><sub><b>Mahmoud Al-Qudsi</b></sub></a><br /><a href="https://github.com/ClementTsang/bottom/commits?author=mqudsi" title="Code">💻</a></td>
  </tr>
</table>

<!-- markdownlint-enable -->
<!-- prettier-ignore-end -->

<!-- ALL-CONTRIBUTORS-LIST:END -->

## Thanks

- This project is very much inspired by both
  [gotop](https://github.com/cjbassi/gotop) and [gtop](https://github.com/aksakalli/gtop).

- Basic mode is heavily inspired by [htop's](https://hisham.hm/htop/) 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.