dua (-> Disk Usage Analyzer) is a tool to conveniently learn about the usage of disk space of a given directory. It's parallel by default and will max out your SSD, providing relevant information as fast as possible. Optionally delete superfluous data, and do so more quickly than rm.

Installation

Binary Release

MacOS

curl -LSfs https://raw.githubusercontent.com/Byron/dua-cli/master/ci/install.sh | \
    sh -s -- --git Byron/dua-cli --crate dua --tag v2.29.0

MacOS via MacPorts:

sudo port selfupdate
sudo port install dua-cli

MacOS via Homebrew

brew update
brew install dua-cli

Linux

Linux requires the target to be specified explicitly to obtain the MUSL build.

curl -LSfs https://raw.githubusercontent.com/Byron/dua-cli/master/ci/install.sh | \
    sh -s -- --git Byron/dua-cli --target x86_64-unknown-linux-musl --crate dua --tag v2.29.0

Windows via Scoop

scoop install dua

Windows via WinGet

winget install Byron.dua-cli

Pre-built Binaries

See the releases section for manual installation of a binary, pre-built for many platforms.

Release archives include build provenance attestations. After downloading an archive, verify that it was built by this repository with the GitHub CLI:

gh attestation verify ./dua-v2.39.1-aarch64-apple-darwin.tar.gz --repo Byron/dua-cli

Cargo

Via cargo, which can be obtained using rustup

For Unix…

cargo install dua-cli
# And if you don't need a terminal user interface (most compatible)
cargo install dua-cli --no-default-features
# Compiles on most platforms, with terminal user interface
cargo install dua-cli --no-default-features --features tui-crossplatform

For Windows, nightly features are currently required.

cargo +nightly install dua-cli

VoidLinux

Via xbps on your VoidLinux system.

xbps-install dua-cli

Fedora

Via dnf on your Fedora system.

sudo dnf install dua-cli

Arch Linux

Via pacman on your ArchLinux system.

sudo pacman -S dua-cli

NixOS

https://search.nixos.org/packages?query=dua

Nix-shell (temporary)

nix-shell -p dua

NixOS configuration

  environment.systemPackages = [
    pkgs.dua
  ];

NetBSD

Via pkgin on your NetBSD system.

pkgin install dua-cli

Or, building from source

cd /usr/pkgsrc/sysutils/dua-cli
make install

Windows

You will find pre-built binaries for Windows in the releases section. Alternatively, install via cargo as in

cargo +nightly install dua-cli

x-cmd

x-cmd is a toolbox for Posix Shell, offering a lightweight package manager built using shell and awk.

x env use dua

• Additionally, the x dua ... command is available, which automatically installs dua without affecting the environment, such as not modifying the PATH variable.

Usage

# count the space used in the current working directory
dua
# count the space used in all directories that are not hidden
dua *
# learn about additional functionality
dua aggregate --help

On macOS, the --deduplicate-apfs-clones traversal option counts fully shared APFS file clones only once in aggregate and interactive runs. It is opt-in because collecting the additional metadata reduces traversal performance by about 6%. Files that share only some blocks are not deduplicated, and --apparent-size still reports each file's logical length.

Tree output

By default aggregate prints a flat listing. Pass --depth N to instead print an indented tree that descends N levels into each input, which is handy for sharing a disk-usage report without opening interactive mode. The inputs form the first level, so --depth 1 lists just them, the same set of entries the flat listing shows.

# show each top-level entry and one level below it
dua aggregate --depth 2

--no-sort and --no-total work the same way they do for the flat listing.

Excluding paths with a pattern file

--ignore-from FILE reads gitignore-style patterns and leaves everything they match out of the report, in both aggregate and interactive mode. This is the --exclude-from of rsync and the --exclude-file of restic, so the same file can answer "how much of this would actually get backed up?".

cat .duaignore
# /target/
# **/node_modules/
# *.log
# !important.log
dua --ignore-from .duaignore

Patterns follow .gitignore syntax - # comments, a trailing / to match directories only, a leading / to anchor to the current working directory or the traversal root, ** to span directories, and ! to re-include something an earlier pattern excluded. They match the paths dua reports, which are relative to the directory being looked at, and matching is case-sensitive on every platform.

The option can be given more than once, in which case later files win over earlier ones, and it can also be set through DUA_IGNORE_FROM. Excluded directories are not descended into at all, so their contents cannot be re-included - the same restriction Git has.

Interactive Mode

Launch into interactive mode with the i or interactive subcommand. Get help on keyboard shortcuts with ?. Use this mode to explore, and/or to delete files and directories to release disk space.

Please note that great care has been taken to prevent accidental deletions due to a multi-stage process, which makes this mode viable for exploration.

dua i
dua interactive

The help screen can be localized via the standard POSIX locale environment variables, in the usual order of precedence LC_ALL > LC_MESSAGES > LANG. English is the default; currently Japanese (ja) is also available when the locale uses UTF-8 or omits the codeset:

LANG=ja_JP.UTF-8 dua i   # then press '?' for the Japanese help screen

Flame graphs

dua stacks prints folded stacks—the "collapsed" interchange format read by flame-graph tools. Each line is an entry's path with ; between its components, a space, and its size in bytes:

dua stacks > disk-usage.folded

dua flamegraph renders the same data with inferno, writes the SVG to a temporary file, and opens it. Pass an output path to write the SVG without opening it. Both commands accept the usual traversal options as well as --depth and --import:

dua flamegraph
dua flamegraph -o disk-usage.svg

Configuration

dua can read an optional configuration file from your OS-specific config directory:

1. Linux/Unix: $XDG_CONFIG_HOME/dua-cli/config.toml (or the platform default config dir)
2. macOS: ~/Library/Application Support/dua-cli/config.toml
3. Windows: %APPDATA%\dua-cli\config.toml

If the file is missing, defaults are used.

Run dua config show-default for a commented template containing every configurable keybinding. Use a string for one binding or an array for aliases; an empty array disables the action. For example:

[keys]
# If true (default), close_pane keys ascend from the main pane.
# If false, close_pane keys follow the quit behavior.
esc_navigates_back = true
close_pane = "esc"
sort_by_name = "ctrl+n"
# Disable permanent deletion and moving entries to the trash.
delete_marked = []
trash_marked = []

Development

Please note that all the following assumes a unix system. On Windows, the linux subsystem should do the job.

Run tests

make tests

Learn about other targets

make

But why is…

…there only one available backend? termion was available previously.

Maintaining both backends seemed more cumbersome than it's worth and add complexity I didn't like anymore. termion had its benefits, but I never liked that it seems to have dropped out of support. Thus crossterm is the only remaining backend and it's very actively developed.

Limitations

• Does not show symbolic links at all if no path is provided when invoking dua
  • in an effort to skip symbolic links, for now there are pruned and are not used as a root. Symbolic links will be shown if they are not a traversal root, but will not be followed.
• Interactive mode only looks good in dark terminals (see this issue)
• easy fix: file names in main window are not truncated if too large. They are cut off on the right.
• There are plenty of examples in tests/fixtures which don't render correctly in interactive mode. This can be due to graphemes not interpreted correctly. With Chinese characters for instance, column sizes are not correctly computed, leading to certain columns not being shown. In other cases, the terminal gets things wrong - I use alacritty, and with certain characters it performs worse than, say iTerm3. See https://github.com/minimaxir/big-list-of-naughty-strings/blob/master/blns.txt for the source.
• In interactive mode, you will need about 60MB of memory for 1 million entries in the graph.
• In interactive mode, the maximum amount of files is limited to 2^32 - 1 (u32::max_value() - 1) entries.
  • One node is used as to 'virtual' root
  • The actual amount of nodes stored might be lower, as there might be more edges than nodes, which are also limited by a u32 (I guess)
  • The limitation is imposed by the underlying petgraph crate, which declares it as unsafe to use u64 for instance.
  • It's possibly UB when that limit is reached, however, it was never observed either.

Similar Programs

• CLI:
  • du
  • dust
  • dutree
  • pdu
• TUI:
  • ncdu
  • gdu
  • godu
• GUI:
  • GNOME's Disk Usage Analyzer, a.k.a. baobab
  • Filelight