Follow this tutorial to install Tmux on Linux.

$ sudo apt-get install tmux

Or for Fedora use dnf.

Now type tmux and it should open the Tmux interface.

If instead you get this [exited]

Open your tmux configuration (see below about Configuring Tmux):

$ vim ~/.tmux.conf

If you have this line. Then either remove it or add it as a comment for future reference.

It was:

set-option -g default-command "reattach-to-user-namespace -l $SHELL"

Now it is:

# set-option -g default-command "reattach-to-user-namespace -l $SHELL"

To learn more about Tmux. You should get a book called “Tmux Productive Mouse Free Development”.

Configuring Tmux

How To Install Tmux on Linux

Tmux has the config file .tmux.conf. If after installing is not in your home directory. Then create this file.

The following configuration is from the Tmux book mentioned above:

set -g default-terminal "xterm"
set -g prefix C-a
unbind C-b
set -s escape-time 1
set -g base-index 1
setw -g pane-base-index 1
bind r source-file ~/.tmux.conf \; display "Reloaded!"
bind C-a send-prefix
bind | split-window -h
bind - split-window -v
bind h select-pane -L
bind j select-pane -D
bind k select-pane -U
bind l select-pane -R
bind -r C-h select-window -t :-
bind -r C-l select-window -t :+
bind -r H resize-pane -L 5
bind -r J resize-pane -D 5
bind -r K resize-pane -U 5
bind -r L resize-pane -R 6
set -g default-terminal "screen-256color"
set-option -g status-bg colour235 #base02
set-option -g status-fg colour136 #yellow
set-option -g status-attr default
set-window-option -g window-status-fg colour244 #base0
set-window-option -g window-status-bg default
set-window-option -g window-status-current-fg colour166 #orange
set-window-option -g window-status-current-bg default
set-option -g pane-border-fg colour235 #base02
set-option -g pane-active-border-fg colour240 #base01  
set-option -g message-bg colour235 #base02
set-option -g message-fg colour166 #orange
set-option -g display-panes-active-colour colour33 #blue
set-option -g display-panes-colour colour166 #orange
set-window-option -g clock-mode-colour colour64 #green
set -g status-left-length 40
set -g status-left "#[fg=green]SomeNameHere: #S #[fg=yellow]#I #[fg=cyan]#P"
set -g status-right "#[fg=cyan]%d %b %R"
set -g status-justify centre
set -g monitor-activity on
set -g visual-activity on
setw -g mode-keys vi

Remap the Caps Lock with Ctrl

Since Tmux uses shortcuts to navigate different panes and windows. You need to remap your Caps Lock key so that it behaves as a Ctrl key…you don’t have to but it’s easier to attach and detach tmux sessions using Caps Lock + a. Than doing Ctrl + a.

$ setxkbmap -option caps:ctrl_modifier

To change back to the original settings:

$ setxkbmap -option

A stuck Caps Lock might happen when you remap the caps lock when it was enabled. To solve this, change back to the original settings and remap when the caps lock is not enabled.

Install Tmuxinator to manage Tmux sessions

This requires that you have Ruby installed. Follow this to install Ruby on Ubuntu. For Fedora, the tutorial is almost the same.

$ gem install tmuxinator

Open a configuration file for a Tmuxinator session

$ tmuxinator open awesome-project

Edit the settings as you want or go here to learn more about configuring Tmuxinator.

Example of a tmuxinator configuration

# ~/.tmuxinator/tom.yml
name: tom
  - shell:
      layout: main-vertical
        - cd ~/
  - blog:
      layout: main-vertical
        - cd /home/blog/ && rvm gemset use blog --default
  - dev:
      layout: main-vertical
        - cd /home/dev/ && vim .
        - cd /home/dev/ && mysql -u homer -p awesome-database
        - cd /home/dev/ && nodemon server.js

This section of the configuration splits the window in half vertically, then the right side splits in half horizontally:

- dev:
      layout: main-vertical
        - cd /home/dev/ && vim .
        - cd /home/dev/ && mysql -u homer -p awesome-database
        - cd /home/dev/ && nodemon server.js

Here is how it looks:

Tmuxinator panes

In this example my tmuxinator file is called tom and I start the session like this:

$ tmuxinator tom

To dettach from the session use the remapped key shortcut CapsLock+a then d.

To stop the session and update the configuration:

$ tmuxinator stop tom
$ tmuxinator open tom

To get a list of all tmuxinator sessions do:

$ tmuxinator list

Get the book Tmux Productive Mouse Free Development to understand in more detail how Tmux works. More details here