Configuring Tmux

Tmux Config file

~/.tmux.conf is the user's tmux config file. Can also have a global one in the /etc/ folder
Can define new shortcuts
Can set up default environments

set command sets a option (short for set-option). Use the -g flag to make it global for all tmux sessions.
set -g prefix C-a. Remap PREFIX to an easier key. Ctrl-a is easier to hit especially if you have remapped Caps Lock to Ctrl (and you have done that haven't you?). Unbind the existing prefix using unbind C-b.
- bind C-a send-prefix will allow us to send Ctrl-a to an application by pressing it twice.
Tmux adds a small delay when sending commands. To make this more responsive use set -sg escape-time 1.
Having 0 based windows and pages isn't great considering the layout of the number keys on a keyboard. We can make the indexes start from 1 by adding setw -g base-index 1 and setw -g pane-base-index 1 to our ~/.tmux.conf file. Note that these commands use setw which is short for set-window-option
Turn the mouse off using setw -g mode-mouse off. It is better in the long run as the mouse will only slow you down.

Can create new PREFIX <char> shortcuts using the bind <char> <commands> format.
For example to bind ctrl-r to reload your tmux.conf file you can use bind r source-file ~/.tmux.conf
Can add a display command to show in the status line that something was done e.g. bind r source-file ~/.tmux.conf \; display "Reloaded!"
Can use bind with the -n prefix to create a binding that does not require the tmux PREFIX. However this will disable that binding for any application that's running in a tmux session so be very careful with this.
bind C-a send-prefix - use this to be able to send ctrl-a to an application by presssing ctrl-a twice.

To spliting panes easier we remap these to use the | and - keys to create the appropriate split bind | split-window -h and bind - split-window -v

To make navigation between windows more VIM like we can remap the keys for moving between panes to hjkl.

bind h select-pane -L
bind j select-pane -D
bind k select-pane -U
bind l select-pane -R

We can also bind ctrl-h and ctrl-l to navigate between windows. Add these lines to the ~/.tmux.conf file.

bind -r C-h select-window -t :-
bind -r C-l select-window -t :+

To resize a pane we can use the resize-pane command passing either -U, -D, -L, -R to specify the direction.
To make this easier use the following rebindings. The -r flag makes the command repeatable so we can repeat the command by repeatedly pressing the key within 500 milliseconds.
```
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 5
```

Make sure the correct color mode is set in Tmux. set -g default-terminal "screen-256color"
This still didn't work for me so I needed to pass the -2 argument to tmux when starting e.g. tmux -2 attach
From vim to verify that this is working I used the Xterm Color Table plugin.