Duf – A Better Linux Disk Monitoring Utility

duf is one of the fancy Linux disk monitoring utilities written in Golang. It is released under MIT license and It supports Linux, macOS, BSD, and even Windows too. Some of the core features of duf include:

• a better ‘df command‘ alternative.
• Light and Dark color scheme.
• Output in JSON format.
• Option to sort, group, and filter output.
• Adjustable terminal Height and Width.

Installing Duf (Disk Usage) Tool in Linux

There are two ways you can install DUF. You can either build it from the source or download the setup in native format (.rpm or .deb) specific to Linux distribution and install it. I will walk you through both methods.

Building Duf from Source

You need to set up the Go (1.12 or above) environment to compile duf. If you don’t have Go set up in your machine, take a look at our comprehensive article on how to set up Go in Ubuntu.

$ git clone https://github.com/muesli/duf.git
$ cd duf
$ go build

Installing Duf from Packages

You can download the duf package from the Github repo directly or use the wget command.

--------- On Debina, Ubuntu & Mint --------- 
$ wget https://github.com/muesli/duf/releases/download/v0.6.0/duf_0.6.0_linux_amd64.deb
$ dpkg -i duf_0.6.0_linux_amd64.deb 


--------- On RHEL, CentOS & Fedora ---------
$ wget https://github.com/muesli/duf/releases/download/v0.6.0/duf_0.6.0_linux_amd64.rpm
$ rpm -ivh duf_0.6.0_linux_amd64.rpm

Usage of Duf (Disk Usage) Tool in Linux

Now, launch the application by simply typing duf from the terminal.

$ duf

Duf has a lot of features, so a good place to start would be to use --help option.

$ duf --help

You can print only specific file systems or devices by passing it as an argument. Since I created this machine in a single partition everything is mounted on the root (/). Based upon your partition scheme you will see different output.

$ duf /home /usr /opt
$ duf /root/
$ duf /var/log

You can pass --all flag to display Pseudo, inaccessible, and duplicate file systems.

$ duf -all

Instead of printing block usage, we can print Inode usage bypassing --inodes as an argument.

$ duf --inodes

You can sort output or display only certain columns based on certain keywords.

$ duf --sort size

You have the option to print only certain columns bypassing the column name as an argument to --output flag.

$ duf --output used,size,avail,usage

Below are the list of valid keywords.

• mountpoint
• size
• used
• avail
• usage
• inodes
• inodes_used
• inodes_avail
• inodes_usage
• type
• filesystem

Duf comes with a light and dark color scheme. To set the color scheme, use the following commands.

$ duf -theme dark               # Dark color scheme
$ duf --theme light             # Light color scheme

Duf supports output in JSON format.

$ duf --json

That’s it for this article. Duf is a maturing tool and there are more features and bug fixes added to it.