======screen=====
Notes on the //GNU screen// console multiplexer. 

//screen// is a program that allows multiple terminals/consoles to be maintained on a host indefinitely independent of a terminal client. This allows remote terminal sessions to be persisted across network connections.

  * [[http://www.gnu.org/software/screen/|Official Website]]

  * sessions
    * create session: screen -S <session id>
    * list sessions: screen -ls
    * detach: Ctrl-a d
    * attach: screen -r <session id>
    * attach to non-detached session (session sharing): screen -x <session id>
    * attach, detaching first if necessary: screen -dr <session id>
    * quit: Ctrl-a Ctrl-\
    * quit: screen -S <session id> -X quit
    * quit: Ctrl-a :quit
  * windows
    * create: Ctrl-a c
    * kill: Ctrl-a k
    * name window title: Ctrl-a A
    * open window list to switch to another window: ''Ctrl-a "''
  * regions
      * vertical split: Ctrl-a |
      * split: Ctrl-a S
      * remove: Ctrl-a X
      * remote all but the current region: Ctrl-a Q
      * move to region: Ctrl-a tab
      * scrollback/scroll in a region: ''C-a ['' or ''C-a ESC'' to enter //copy mode// then arrow keys.
  * [[http://www.gnu.org/software/screen/manual/html_node/index.html|Screen Manual]]
  * [[http://www.samsarin.com/blog/2007/03/11/gnu-screen-working-with-the-scrollback-buffer/|screen's scrollback buffer]]

======Common Commands=======
  * create session: ''screen -S <session id>''
  * attach to a session: ''screen -r <session id>''
      * In some cases it is necessary to detach from a session before re-attaching to it: ''screen -dr <session id>''
  * open window list to switch to another window: ''Ctrl-a "''
  * create window: ''Ctrl-a c''
  * name window title: ''Ctrl-a A''
  * kill window: ''Ctrl-a k''

======Nested Sessions======
  * Use key sequence ''Ctrl+a a'' to send commands to the nested session.

======.screenrc Configuration======
  * [[https://gist.github.com/joaopizani/2718397]]

<code>
# the following two lines give a two-line status, with the current window highlighted
hardstatus alwayslastline
hardstatus string '%{= kG}[%{G}%H%? %1`%?%{g}][%= %{= kw}%-w%{+b yk} %n*%t%?(%u)%? %{-}%+w %=%{g}][%{B}%m/%d %{W}%C%A%{g}]'

# huge scrollback buffer
defscrollback 5000

# no welcome message
startup_message off

# 256 colors
attrcolor b ".I"
termcapinfo xterm 'Co#256:AB=\E[48;5;%dm:AF=\E[38;5;%dm'
defbce on

# mouse tracking allows to switch region focus by clicking
mousetrack on

# default windows
# screen -t Shell1  1 bash
# screen -t Shell2  2 bash
# screen -t Python  3 python
# screen -t Media   4 bash
# select 0
# bind c screen 1 # window numbering starts at 1 not 0
# bind 0 select 10

# get rid of silly xoff stuff
bind s split

# layouts
layout autosave on
layout new one
select 1
layout new two
select 1
split
resize -v +8
focus down
select 4
focus up
layout new three
select 1
split
resize -v +7
focus down
select 3
split -v
resize -h +10
focus right
select 4
focus up

layout attach one
layout select one

# navigating regions with Ctrl-arrows
bindkey "^[[1;5D" focus left
bindkey "^[[1;5C" focus right
bindkey "^[[1;5A" focus up
bindkey "^[[1;5B" focus down

# switch windows with F3 (prev) and F4 (next)
bindkey "^[OR" prev
bindkey "^[OS" next

# switch layouts with Ctrl+F3 (prev layout) and Ctrl+F4 (next)
bindkey "^[O1;5R" layout prev
bindkey "^[O1;5S" layout next

# F2 puts Screen into resize mode. Resize regions using hjkl keys.
bindkey "^[OQ" eval "command -c rsz" # enter resize mode

# use hjkl keys to resize regions
bind -c rsz h eval "resize -h -5" "command -c rsz"
bind -c rsz j eval "resize -v -5" "command -c rsz"
bind -c rsz k eval "resize -v +5" "command -c rsz"
bind -c rsz l eval "resize -h +5" "command -c rsz"

# quickly switch between regions using tab and arrows
bind -c rsz \t    eval "focus"       "command -c rsz" # Tab
bind -c rsz -k kl eval "focus left"  "command -c rsz" # Left
bind -c rsz -k kr eval "focus right" "command -c rsz" # Right
bind -c rsz -k ku eval "focus up"    "command -c rsz" # Up
bind -c rsz -k kd eval "focus down"  "command -c rsz" # Down
</code>