Tmux

tmux
or how I learned to just compile it locally and not wait
for it to get installed on sandbox
-
TERMINAL MULTIPLEXER

Wednesday, December 5, 12

what is tmux?


what is tmux?
tmux is a terminal multiplexer: it enables a number of
terminals (or windows), each running a separate program,
to be created, accessed, and controlled from a single
screen. tmux may be detached from a screen and continue
running in the background, then later reattached.


screenshots


AWESOME!

event better...


our goal: doing this

tmux vs. screen


a consistent, well-
documented command
interface, with the same
syntax whether used
interactively, as a key
binding, or from the
shell

in other words
sane conﬁguration


easily scriptable
from the shell


tmux can split vertically
screen requires a patch


tmux bible

So, how did I install
tmux?


libevent

$ wget http://sourceforge.net/projects/levent/files/latest/download

$ tar xfz libevent-2.0.17-stable.tar.gz

$ cd libevent-2.0.17-stable/

$ /configure—prefix=/home/jlotito

$ make

$ make install


tmux

$ wget http://sourceforge.net/projects/tmux/files/latest/download

$ tar xfz tmux-1.6.tar.gz

$ cd tmux-1.6

$ ./configure—prefix=/home/jlotito


tmux cont.
$ ./conﬁgure—preﬁx=/home/jlotito CPPFLAGS=”-I$HOME/include”
LDFLAGS=”-static -L$HOME/include -L$HOME/lib”

$ make

$ make install

$ export PATH=~/bin:$PATH

$ tmux -V

tmux 1.6


If you have permissions,
you can do it.


sandbox vim: 7.0
my vim: 7.3


:set rnu


but you shouldn’t have
to set things up


$ cd
$ mkdir bin
$ cp ~/../jlotito/bin/tmux ~/bin
$ export PATH=~/bin:$PATH


$ tmux


prefix = CTRL + b
This is the default prefix
It’s run before every command

prefix d
This means type ‘CTRL + b’ and then type ‘d’.


preﬁx d
Detaches from the current tmux session
In other words, it exits tmux


detach
do it


$ tmux attach
reattaches to the tmux session


do it
now


Multiple sessions
You can have them
We won’t discuss them today


preﬁx c
create a new window (or tab)


preﬁx #
‘preﬁx 1’ takes you to tab #1


preﬁx w
provides a list of windows available
‘j’ and ‘k’ to scroll the selections


preﬁx %
That’s not 5, but ‘%’, which means
preﬁx SHIFT+5

This splits the pane in half


preﬁx x
In the lower portion of tmux, you’ll see it ask you:
kill pane 2? (y/n)

type ‘y’


preﬁx “
split horizontally


preﬁx o
switch between panes


preﬁx CTRL + o
move panes around layout


PREFIX SPACE
change layout of panes


Try scrolling in a pane
haha


preﬁx [
CTRL u : up a lot
CTRL d: down a lot
Love alot.
j : up a line
d : down a line
q: quit


Conﬁguration
$ touch ~/.tmux.conf


CTRL + B is awkward
# Prefix Config
set -g prefix C-a
unbind C-b
bind C-a send-prefix


preﬁx = CTRL + a
Remap CAPS LOCK to CTRL.


Make it responsive
# Changing the default delay
set -sg escape-time 1


Easy config changes
# Easy config changes
bind r source-file ~/.tmux.conf ; display "Reloaded!"


Easy Pane Spitting
# Splitting Panes
bind split-window -h
bind - split-window -v


Easy Pane Movement
# Movement keys, vim style
bind h select-pane -L
bind j select-pane -D
bind k select-pane -U
bind l select-pane -R


move one pane left
preﬁx h


Pane Resizing
# Pane resizing, vim style
bind H resize-pane -L 5
bind J resize-pane -D 5
bind K resize-pane -U 5
bind L resize-pane -R 5


Try the pane resizing
Don’t forget to run this command
preﬁx r


Let’s make resizing
easier by repeating
# Pane resizing, vim style
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


resize
preﬁx L

-r You can hold it down, and it will keep moving


Start at 1
# Windows and panes index renumbering
set -g base-index 1
setw -g pane-base-index 1


Basic UI
# Colors
set -g status-fg white
set -g status-bg black


Window movement
# Window Movement
bind -r C-h select-window -t :-
bind -r C-l select-window -t :+


or...
preﬁx w


or...
preﬁx #
#: 0-9


timtowtdi
• is


tmux & screen notes
http://www.dayid.org/os/notes/tm.html


book
http://pragprog.com/book/bhtmux/tmux


web
http://tmux.sourceforge.net/


we were using tmux 1.6
latest is tmux 1.7


tmux configuration files now support line-continuation with a "" at the
end of a line.
* New option status-position to move the status line to the top or bottom of
the screen.
* Enforce history-limit option when clearing the screen.
* Give each window a unique id, like panes but prefixed with @.
* Add pane id to each pane in layout description (while still accepting
the old form).
* Provide defined ways to set the various default-path possibilities: ~
for home directory, . for server start directory, - for session start
directory and empty for the pane's working directory (the default). All
can also be used as part of a relative path (eg -/foo). Also provide -c
flags to neww and splitw to override default-path setting.
* Add -l flag to send-keys to send input literally (without translating
key names).
* Allow a single option to be specified to show-options to show just that
option.
* New command "move-pane" (like join-pane but allows the same window).
* join-pane and move-pane commands learn "-b" option to place the pane to
the left or above.
* Support for bracketed-paste mode.
* Allow send-keys command to accept hex values.
* Add locking around "start-server" to avoid race-conditions.
* break-pane learns -P/-F arguments for display formatting.
* set-option learns "-q" to make it quiet, and not print out anything.

new in 1.7
* copy mode learns "wrap-search" option.
* Add a simple form of output rate limiting by counting the number of
certain C0 sequences (linefeeds, backspaces, carriage returns) and if it
exceeds a threshold (current default 250/millisecond), start to redraw
the pane every 100 milliseconds instead of making each change as it
comes. Two configuration options - c0-change-trigger and
c0-change-interval.
* find-window learns new flags: "-C", "-N", "-T" to match against either or
all of a window's content, name, or title. Defaults to all three options
if none specified.
* find-window automatically selects the appropriate pane for the found
matches.
* show-environment can now accept one option to show that environment value.
* Exit mouse mode when end-of-screen reached when scrolling with the mouse
wheel.
* select-layout learns -u and -U for layout history stacks.
* kill-window, detach-client, kill-session all learn "-a" option for
killing all but the current thing specified.
* move-window learns "-r" option to renumber window sequentially in a
session.
* New session option "renumber-windows" to automatically renumber windows in
a session when a window is closed. (see "move-window -r").
* Only enter copy-mode on scroll up.
* choose-* and list-* commands all use "-F" for format specifiers.
* When spawning external commands, the value from the "default-shell" option
is now used, rather than assuming /bin/sh.
* New choose-tree command to render window/sessions as a tree for selection.
* display-message learns new format options.
* For linked-windows across sessions, all flags for that window are now
cleared across sessions.
* Lots and lots of bug fixes, fixing memory-leaks, etc.
* Various manpage improvements.


ﬁn.


Tmux

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