Deric Pang

A Minimum Viable Tmux Config

Last updated on

When I first started using Tmux, I was frustrated with its unintuitive defaults. Over time, I pinpointed the features that I used the most and made them easier to access through better keybindings. I also customized my color scheme and status bar and made several quality of life improvements.

When going through this walkthrough, it's best to focus on what I'm configuring rather than how. Create a small custom config instead of copying someone else's since understanding how to extend and customize your tools is the key to unlocking their full potential.

What can Tmux do?

The main pieces of functionality that you will use in Tmux are:

Better Keybindings

Let's set up better keybindings for the parts of Tmux that we most commonly use.

Tmux Prefix

The Tmux prefix is a key chord that is used before all Tmux commands. I've gotten used to using the default, which is C-b (control followed by "b" without letting go of control), but it's common to use C-a instead. If you want to remap the prefix to C-a, add this to your .tmux.conf:

bind-key C-a send-prefix


Tmux "panes" are each a separate shell session, and each window holds one or more panes. You can add panes to a window in a way that is similar to splitting in a text editor.

Let's set up these keybindings:

Add the following to your .tmux.conf:

# Split panes using | and -. Start the new pane at the path of the current pane.
unbind-key '"'
unbind-key %
bind-key | split-window -h -c "#{pane_current_path}"
bind-key - split-window -v -c "#{pane_current_path}"

# Vim-like pane navigation and resizing.
bind-key h select-pane -L
bind-key j select-pane -D
bind-key k select-pane -U
bind-key l select-pane -R
bind-key -r H resize-pane -L 5
bind-key -r J resize-pane -D 5
bind-key -r K resize-pane -U 5
bind-key -r L resize-pane -R 5


Tmux "windows" are like the tabs in a web browser. Each window contains a number of "panes", each of which is a separate shell session. The default keybindings for managing windows are actually quite good, and I'll list out the important ones here:


Tmux "sessions" are collections of "windows" and "panes". I often have one session for each project I'm working on.

Let's set up the following keybindings:

Add the following to your .tmux.conf:

# Create new session.
bind-key C-c new-session -c "~"

# Search for a session.
bind-key C-f command-prompt -p find-session 'switch-client -t %%'

Status Bar & Color Scheme

I really like the Gruvbox1 Vim color scheme, so I use a Gruvbox-like color scheme in Tmux heavily inspired by egel/tmux-gruvbox.

Add the following to your .tmux.conf:

# COLORSCHEME: gruvbox dark
set-option -g status "on"

set-option -g status-style bg=colour237,fg=colour223 # bg=bg1, fg=fg1

set-window-option -g window-status-activity-style bold,underscore

set-option -g pane-active-border-style fg=colour250 #fg2
set-option -g pane-border-style fg=colour237 #bg1

set-option -g message-style bg=colour239,fg=colour223 # bg=bg2, fg=fg1

set-option -g message-command-style bg=colour239,fg=colour223 # bg=fg3, fg=bg1

set-option -g display-panes-active-colour colour250 #fg2
set-option -g display-panes-colour colour237 #bg1

set-option -g status-justify "left"
set-option -g status-left-style none
set-option -g status-left-length "80"
set-option -g status-right-style none
set-option -g status-right-length "80"
set-window-option -g window-status-separator ""

set-option -g status-left "#[fg=colour248, bg=colour241] #S #[fg=colour241, bg=colour237, nobold, noitalics, nounderscore]"
set-option -g status-right "#[fg=colour248, bg=colour237, nobold, noitalics, nounderscore]#{?client_prefix,#[reverse] ⌨#[noreverse],}#[fg=colour237, bg=colour248] #h "

set-window-option -g window-status-current-format " #[fg=colour239, bg=colour214] #I |#[fg=colour239, bg=colour214, bold] #W "

set-window-option -g window-status-format " #[fg=#{?window_bell_flag,colour235,colour223},bg=#{?window_bell_flag,colour167,colour239}] #I |#[fg=#{?window_bell_flag,colour235,colour223}, bg=#{?window_bell_flag,colour167,colour239}] #W "

If you're interested in a version of the status bar settings that use Powerline2 symbols, check out my Tmux config on GitHub.

Quality of Life Improvements

There's a few things in my config that make working with Tmux easier:

# Reload tmux config with <prefix>-r.
bind-key r source-file ~/.tmux.conf \; display '~/.tmux.conf sourced'

# Set scroll history to 100,000 lines.
set-option -g history-limit 100000

# Lower the time it takes to register ESC.
set -s escape-time 0

# Mouse mode on.
set -g mouse on

# When scrolling with mouse wheel, reduce number of scrolled rows per tick to 1.
bind-key -T copy-mode-vi WheelUpPane select-pane \; send-keys -X -N 1 scroll-up
bind-key -T copy-mode-vi WheelDownPane select-pane \; send-keys -X -N 1 scroll-down

# Use Vim keybindings in copy mode.
set-window-option -g mode-keys vi

# Renumber windows when a window is closed.
set -g renumber-windows on

# Turn on activity monitors.
set -g monitor-activity on
set -g visual-activity off


That basically covers my entire Tmux config, which you can check out on GitHub. I hope this walkthrough helps you get started with Tmux!