tmux.conf

# Remap prefix from 'C-b' to 'C-q'
unbind C-b
set-option -g prefix C-q
bind-key C-q send-prefix

# Split panes using `|` and `-`
bind-key | split-window -h
bind-key - split-window -v
unbind '"'
unbind %

# Reload config file (change file location to your the tmux.conf you want to use)
bind r source-file ~/.tmux.conf

# Unbind Vim split keys in due to old habits.
unbind h
unbind l
unbind k
unbind j

# Smart pane switching with awareness of Vim splits.
# See: https://github.com/christoomey/vim-tmux-navigator
is_vim="ps -o state= -o comm= -t '#{pane_tty}' \
    | grep -iqE '^[^TXZ ]+ +(\\S+\\/)?g?(view|n?vim?x?)(diff)?$'"
bind-key -n 'C-h' if-shell "$is_vim" 'send-keys C-h'  'select-pane -L'
bind-key -n 'C-j' if-shell "$is_vim" 'send-keys C-j'  'select-pane -D'
bind-key -n 'C-k' if-shell "$is_vim" 'send-keys C-k'  'select-pane -U'
bind-key -n 'C-l' if-shell "$is_vim" 'send-keys C-l'  'select-pane -R'
tmux_version='$(tmux -V | sed -En "s/^tmux ([0-9]+(.[0-9]+)?).*/\1/p")'
if-shell -b '[ "$(echo "$tmux_version < 3.0" | bc)" = 1 ]' \
    "bind-key -n 'C-\\' if-shell \"$is_vim\" 'send-keys C-\\'  'select-pane -l'"
if-shell -b '[ "$(echo "$tmux_version >= 3.0" | bc)" = 1 ]' \
    "bind-key -n 'C-\\' if-shell \"$is_vim\" 'send-keys C-\\\\'  'select-pane -l'"

bind-key -T copy-mode-vi 'C-h' select-pane -L
bind-key -T copy-mode-vi 'C-j' select-pane -D
bind-key -T copy-mode-vi 'C-k' select-pane -U
bind-key -T copy-mode-vi 'C-l' select-pane -R
bind-key -T copy-mode-vi 'C-\' select-pane -l

# Swap window order
bind-key -n C-S-Left swap-window -t -1
bind-key -n C-S-Right swap-window -t +1

# Clear screen with `alt + k`
bind-key M-k send-keys -R \; clear-history

# Enable mouse mode (tmux 2.1 and above)
set -g mouse on

# Don't rename windows automatically
set-option -g allow-rename off
# Renumber windows automatically
set-option -g renumber-windows on

# Use custom theme
source-file "${HOME}/.tmux-themepack/basic.tmuxtheme"

# Copy using vim shortcuts. https://www.rushiagr.com/blog/2016/06/16/everything-you-need-to-know-about-tmux-copy-pasting-ubuntu/
bind-key -T copy-mode-vi v send-keys -X begin-selection
bind-key -T copy-mode-vi y send-keys -X copy-selection
# Paste with `P`
bind P paste-buffer