Screen¶

resource : https://linuxize.com/post/how-to-use-linux-screen/

resource : https://www.cyberciti.biz/faq/unix-linux-apple-osx-bsd-screen-set-baud-rate/

start a new screen session

$ screen

Close/Kill Screen/Serial connection

CTRL A + k

detach from a screen session

CTRL + a d
or
CTRL + a  CTRL + d

quit/close a screen session (normal Bash shortcut, may not work on serial connection)

CTRL + d

list current screen sessions

[root@ceasar ~]# screen -ls
There are screens on:
  2892.pts-0.ceasar (Detached)
  2889.a_long_process  (Detached)
  2876.pts-0.ceasar (Detached)
3 Sockets in /run/screens/S-root.

start a named screen session

$ screen -S a_long_process

resume a screen session

$ screen -r a_long_process
$ screen -r 2892

lock/password protect a screen session

CTRL a + x

Connect to a serial port # screen /dev/ttySX baud_rate,cs8|cs7,ixon|-ixon,ixoff|-ixoff,istrip|-istrip

/dev/ttySX: Linux serial port (e.g., /dev/ttyS0 [COM1] )
baud_rate: Usually 300, 1200, 9600 (default), 19200, or 115200. This affects transmission as well as receive speed.
cs8 or cs7: Specify the transmission of eight (or seven) bits per byte.
ixon or -ixon: Enables (or disables) software flow-control (CTRL-S/CTRL-Q) for sending data.
ixoff or -ixoff: Enables (or disables) software flow-control for receiving data.
istrip or -istrip: Clear (or keep) the eight bit in each received byte.

screen /dev/ttyUSB0 115200,cs8

other: To create a new window with shell type Ctrl+a c, the first available number from the range 0…9 will be assigned to it.

Below are some most common commands for managing Linux Screen Windows:

Ctrl+a c Create a new window (with shell)
Ctrl+a ” List all window
Ctrl+a i Display Connection information
Ctrl+a 0 Switch to window 0 (by number )
Ctrl+a A Rename the current window
Ctrl+a S Split current region horizontally into two regions
Ctrl+a | Split current region vertically into two regions
Ctrl+a tab Switch the input focus to the next region
Ctrl+a Ctrl+a Toggle between the current and previous region
Ctrl+a Q Close all regions but the current one
Ctrl+a X Close the current region