An Illustrated Guide to Some Useful Command Line Tools - by Wesley Moore

An Illustrated Guide to Some Useful Command Line Tools

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Inspired by a similar post by Ben Boyter this a list of useful command line tools that I use. It’s not a list of every tool I use. These are tools that are new or typically not part of a standard POSIX command line environment.

This post is a living document and will be updated over time. It should be obvious that I have a strong preference for fast tools without a large runtime dependency like Python or node.js. Most of these tools are portable to *BSD, Linux, macOS. Many also work on Windows. For OSes that ship up to date software many are available via the system package repository.

Last updated: 31 Oct 2019

About my CLI environment: I use the zsh shell, Pragmata Pro font, and base16 default dark color scheme. My prompt is generated by promptline.

Table of Contents

Alacritty Language: Rust

Alacritty is fast terminal emulator. Whilst not strictly a command line tool, it does host everything I do in the command line. It is the terminal emulator in use in all the screenshots on this page.


alt Language: Rust

alt is a tool for finding the alternate to a file. E.g. the header for an implementation or the test for an implementation. I use it paired with Neovim to easily toggle between tests and implementation.

$ alt app/models/page.rb


bat Language: Rust

bat is an alternative to the common (mis)use of cat to print a file to the terminal. It supports syntax highlighting and git integration.

bat screenshot


bb Language: Rust

bb is system monitor like top. It shows overall CPU and memory usage as well as detailed information per process.

bb screenshot


chars Language: Rust

chars shows information about Unicode characters matching a search term.

chars screenshot


dot Language: Rust

dot is a dotfiles manager. It maintains a set of symlinks according to a mappings file. I use it to manage my dotfiles.

dot screenshot


dust Language: Rust

dust is an alternative du -sh. It calculates the size of a directory tree, printing a summary of the largest items.

dust screenshot


exa Language: Rust

exa is a replacement for ls with sensible defaults and added features like a tree view, git integration, and optional icons. I have ls aliased to exa in my shell.

exa screenshot


eva Language: Rust

eva is a command line calculator similar to bc, with syntax highlighting and persistent history.

eva screenshot


fd Language: Rust

fd is an alternative to find and has a more user friendly command line interface and respects ignore files, like .gitignore. The combination of its speed and ignore file support make it excellent for searching for files in git repositories.

fd screenshot


hexyl Language: Rust

hexyl is a hex viewer that uses Unicode characters and colour to make the output more readable.

hexyl screenshot


hyperfine Language: Rust

hyperfine command line benchmarking tool. It allows you to benchmark commands with warmup and statistical analysis.

hyperfine screenshot


jq Language: C

jq is kind of like awk for JSON. It lets you transform and extract information from JSON documents.

jq screenshot


mdcat Language: Rust

mdcat renders Markdown files in the terminal. In supported terminals (not Alacritty) links are clickable (without the url being visible like in a web browser) and images are rendered.

mdcat screenshot


pass Language: sh

pass is a password manager that uses GPG to store the passwords. I use it with the passff Firefox extension and Pass for iOS on my phone.

pass screenshot


Podman Language: Go

podman is an alternative to Docker that does not require a daemon. Containers are run as the user running Podman so files written into the host don’t end up owned by root. The CLI is largely compatible with the docker CLI.

podman screenshot


Restic Language: Go

restic is a backup tool that performs client side encryption, de-duplication and supports a variety of local and remote storage backends.


ripgrep Language: Rust

ripgrep (rg) recursively searches file trees for content in files matching a regular expression. It’s extremely fast, and respects ignore files and binary files by default.

ripgrep screenshot


shotgun Language: Rust

shotgun is a tool for taking screenshots on based environments. All the screenshots in this post were taken with it. It pairs well with slop.

$ shotgun $(slop -c 0,0,0,0.75 -l -f "-i %i -g %g") eva.png


skim Language: Rust

skim is a fuzzy finder. It can be used to fuzzy match input fed to it. I use it with Neovim and zsh for fuzzy matching file names.

skim screenshot


slop Language: C++

slop (Select Operation) presents a UI to select a region of the screen or a window and prints the region to stdout. Works well with shotgun.

$ slop -c 0,0,0,0.75 -l -f "-i %i -g %g"
-i 8389044 -g 1464x1008+291+818


Syncthing Language: Go

Syncthing is a decentralised file synchronisation tool. Like Dropbox but self hosted and without the need for a central third-party file store.


tig Language: C

tig is a ncurses TUI for git. It’s great for reviewing and staging changes, viewing history and diffs.

tig screenshot


titlecase Language: Rust

titlecase is a little tool I wrote to format text using a title case format described by John Gruber. It correctly handles punctuation, and words like iPhone. I use it to obtain consistent titles on all my blog posts.

$ echo 'an illustrated guide to useful command line tools' | titlecase
An Illustrated Guide to Useful Command Line Tools

I typically use it from within Neovim where selected text is piped through it in-place. This is done by creating a visual selection and then typing: :!titlecase.


Universal Ctags Language: C

Universal Ctags is a fork of exuberant ctags that is actively maintained. ctags is used to generate a tags file that vim and other tools can use to navigate to the definition of symbols in files.

$ ctags --recurse src


watchexec Language: Rust

watchexec is a file and directory watcher that can run commands in response to file-system changes. Handy for auto running tests or restarting a development web server when source files change.

# run command on file change
$ watchexec -w content cobalt build

# kill and restart server on file change
$ watchexec -w src -s SIGINT -r 'cargo run'


z Language: sh

z tracks your most used directories and allows you to jump to them with a partial name.

z screenshot


zola Language: Rust

zola is a full-featured very fast static site compiler.

zola screenshot




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