Screen
Intro
Screen is a full screen window manager, which divide a terminal between several processes. Using screen you can handle a task from on a PC, by detaching the terminal to which it is bound and resume it on another terminal or PC.
Screen read all typed commands through the shell from which it was launched. In order to interact directly with its window manager, it must automatically be launched using the sequence of keys "CTRL-a" followed by a key or another key sequence.
Opening a screen session
To open a
screen session from a terminal (or Xterm) type the following command:
screen -r
Seperating a screen session
To detach a screen session and return to his connection shell, simply type:
CTRL-a d
Return to a screen session
To return to a screen session, type:
screen –r
Closing a screen session
To close a screen session, simply type:
CTRL-a \
Note that :"
\" (backslash) is obtained using the following combination of keys "
Alt Gr +8".
Seperating a window into several parts
The separation of your terminal into two parts is done in three phases. Note that you can repeat the procedure, split screen in more than two parts.
Splitting the terminal
CTRL-a MAJ-s
Switch to the new window
CTRL-a TAB
Open a new terminal
CTRL-a c
Managing the different windows
Select a particular window
If several active windows:
CTRL-a "
or
CTRL-a n
or
CTRL-a '
Resizing a window
To modify the size of a window, just:
To extend it:
CTRL-a :resize + n
To decrease the size:
CTRL-a :resize – n
Adjust all windows to the same size:
CTRL-a :resize =
Renaming a window
To rename a window, simply type:
CTRL-a MAJ-a
Enter the new name for the window, and then validate using the
Enter key.
Making use of screen
Connecting via ssh on machine B
Launch screen
screen
Launching a command for an active task
Hold task (suspending it)
CTRL + Z
Set to background
bg% 1
Protection of the task using
nohup
nohup top &
Seperating the screen
CTRL + a => d
Disconnect
exit
Launching screen on the machine B from a shell
Recovering the screen
screen-r
Verifying the task
jobs
Setting task as priority
fg %1