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<h1>My tmux configuration</h1>
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<span class="meta">Posted by
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<a href="https://captainark.net/author/antoine-joubert.html">Antoine Joubert</a>
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on Tue 02 February 2016
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<article>
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<p><a href="https://tmux.github.io/">tmux</a> is a terminal mutiplexer. It lets you have multiples shells running in a single terminal emulator window and it keeps those shells running in the background should you need to close your terminal emulator.</p>
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<p>I've played around with the configuration quite a bit to find settings that suit my needs. Here's what it ended up looking like :</p>
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<p><a href="images/tmux_fullsize.png"><img alt="tmux" src="images/tmux.png"></a></p>
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<p>This screenshot was done on Mac OS X, using the Terminal app and this <a href="https://github.com/tomislav/osx-terminal.app-colors-solarized">Solarized theme</a>.</p>
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<p>I figured I'd share my tmux configuration here !</p>
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<h2>Installing tmux</h2>
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<p>tmux is available on Debian. I suggest using the <a href="https://packages.debian.org/jessie-backports/tmux">jessie backports</a> version :</p>
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<p><code>apt -t jessie-backports install tmux</code></p>
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<p>tmux is also available on Mac OS X using <a href="http://brew.sh/">brew</a> :</p>
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<p><code>brew install tmux</code></p>
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<h2>tmux.conf</h2>
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<p>I used screen before tmux, so I configured the prefix key on C-a instead of C-b. tmux has the advantage of being <em>much</em> simpler to configure than screen.</p>
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<p>If you want to use this configuration, simply copy the following in ~/.tmux.conf. This file is read by default when tmux starts.</p>
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<p>If you simply want to try it out, copy it in a file somewhere else and have tmux load with the -f parameter (<code>tmux -f ~/tmux-test.conf</code>).</p>
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<div class="highlight"><pre><span></span># use utf8
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set -g utf8
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set-option -g status-utf8 on
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set-window-option -g utf8 on
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# do not wait on esc key
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set-option -g escape-time 0
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# completely disable automatic rename
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set-window-option -g automatic-rename off
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# basic settings
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set -g default-terminal "screen-256color"
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set -g aggressive-resize off
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set-window-option -g xterm-keys on
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#set-window-option -g mode-mouse off
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# command history
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set -g history-limit 10000
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# messages
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set -g message-bg default
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set -g message-fg red
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# no visual activity
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set -g visual-activity off
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set -g visual-bell off
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# status bar
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set-option -g status-justify centre
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set-option -g status-bg default
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set-option -g status-fg blue
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set-option -g status-interval 5
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set-option -g status-left-length 30
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set-option -g status-left '#[fg=red][ #[fg=white]#H #[fg=red]]#[default]'
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set-option -g status-right '#[fg=red][ #[fg=white]%R %d/%m #[fg=red]]#[default]'
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# modes
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set-option -g mode-bg default
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set-option -g mode-fg blue
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# inactive window format
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set-window-option -g window-status-format '#I:#W#F'
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set-window-option -g monitor-activity on
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#set-window-option -g monitor-content on # not available in tmux 2.0
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# activity in a window
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set-window-option -g window-status-activity-attr dim
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set-window-option -g window-status-activity-bg default
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set-window-option -g window-status-activity-fg yellow
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# content in a window # not available in tmux 2.0
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#set-window-option -g window-status-content-attr dim
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#set-window-option -g window-status-content-bg default
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#set-window-option -g window-status-content-fg red
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# active window format
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set-window-option -g window-status-current-fg white
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set-window-option -g window-status-current-bg default
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set-window-option -g window-status-current-format '#[fg=red](#[default]#I:#W#F#[fg=red])#[default]'
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# reload tmux configuration
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unbind r
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bind r source-file ~/.tmux.conf \; display "Configuration reloaded!"
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# Screen-like keybinds
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unbind C-b
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set -g prefix ^A
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set -g prefix2 ^Q
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bind a send-prefix
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bind q send-prefix
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unbind c
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bind c new-window
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unbind ^C
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bind ^C new-window
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unbind n
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bind n next-window
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unbind ^N
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bind ^N next-window
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unbind A
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bind A command-prompt "rename-window %%"
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unbind p
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bind p previous-window
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unbind ^P
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bind ^P previous-window
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unbind a
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bind a last-window
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unbind ^A
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bind ^A last-window
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unbind [
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bind Escape copy-mode
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unbind w
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bind w list-windows
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unbind k
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bind k confirm-before "kill-window"
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unbind l
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bind l refresh-client
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unbind '"'
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bind '"' choose-window
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</pre></div>
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<h2>Aliases</h2>
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<p>I also use two functions with tmux (in ~/.bash_aliases).</p>
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<p>The first one creates a new "mytmux" tmux session if one doesn't exist yet, opens 10 shells and selects the first one.</p>
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<div class="highlight"><pre><span></span>mytmux<span class="o">()</span> <span class="o">{</span>
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tmux has-session -t mytmux
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<span class="k">if</span> <span class="o">[</span> <span class="nv">$?</span> !<span class="o">=</span> <span class="m">0</span> <span class="o">]</span><span class="p">;</span> <span class="k">then</span>
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tmux new-session -s mytmux -n <span class="k">$(</span>hostname<span class="k">)</span> -d
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tmux new-window -t mytmux:1 -n <span class="k">$(</span>hostname<span class="k">)</span>
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tmux new-window -t mytmux:2 -n <span class="k">$(</span>hostname<span class="k">)</span>
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tmux new-window -t mytmux:3 -n <span class="k">$(</span>hostname<span class="k">)</span>
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tmux new-window -t mytmux:4 -n <span class="k">$(</span>hostname<span class="k">)</span>
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tmux new-window -t mytmux:5 -n <span class="k">$(</span>hostname<span class="k">)</span>
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tmux new-window -t mytmux:6 -n <span class="k">$(</span>hostname<span class="k">)</span>
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tmux new-window -t mytmux:7 -n <span class="k">$(</span>hostname<span class="k">)</span>
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tmux new-window -t mytmux:8 -n <span class="k">$(</span>hostname<span class="k">)</span>
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tmux new-window -t mytmux:9 -n <span class="k">$(</span>hostname<span class="k">)</span>
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tmux <span class="k">select</span>-window -t mytmux:0
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<span class="k">fi</span>
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tmux attach -t mytmux
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<span class="o">}</span>
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</pre></div>
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<p>The second one changes the tmux window name whenever I ssh to a remote host, and switches the window name back to the name of my computer when I logout from the host.</p>
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<div class="highlight"><pre><span></span><span class="k">if</span> <span class="o">[</span> -n <span class="s2">"</span><span class="nv">$TMUX</span><span class="s2">"</span> <span class="o">]</span><span class="p">;</span> <span class="k">then</span>
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ssh<span class="o">()</span> <span class="o">{</span>
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<span class="k">if</span> <span class="o">[</span> <span class="nv">$#</span> -le <span class="m">2</span> <span class="o">]</span><span class="p">;</span> <span class="k">then</span>
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tmux rename-window <span class="s2">"</span><span class="si">${</span><span class="p">@: -1</span><span class="si">}</span><span class="s2">"</span>
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<span class="nb">command</span> ssh <span class="s2">"</span><span class="nv">$@</span><span class="s2">"</span>
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tmux rename-window <span class="s2">"</span><span class="k">$(</span>hostname<span class="k">)</span><span class="s2">"</span>
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<span class="k">else</span>
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<span class="nb">command</span> ssh <span class="s2">"</span><span class="nv">$@</span><span class="s2">"</span>
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<span class="k">fi</span>
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<span class="o">}</span>
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<span class="k">fi</span>
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</pre></div>
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<h2>Conclusion</h2>
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<p>That's all ! As always, please do leave a comment if you've found something useful in this article !</p>
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