Linux attached and detach screen



While downloading in progress, you can press “Ctrl-A” and “d“. You will not see anything when you press those buttons. The output will be like this:

[detached from]
pungki@mint ~ $

Re-attach the screen

After you detach the screen, let say you are disconnecting your SSH session and going home. In your home, you start to SSH again to your server and you want to see the progress of your download process. To do that, you need to restore the screen. You can run this command:

pungki@mint ~ $ screen -r



Linux Screen How To


Login to remote server over ssh

$ ssh

(C) Start screen session. You can name your window/session (1 is name of session):
$ screen -S 1

Let us start pine mail reader on first session or window.
$ pine

(D) Next you would like to download something from ftp/http site while you are reading emails. You need to create another screen window by pressing special key combination. Press CTRL + a followed by c key (first hit CTRL+a, releases both keys and press c). As soon as you hit ‘c’ you will get new shell prompt at console. Now use wget to download belenix.iso.bz2 (Solaris live CD) from net:
$ wget

(E) But how do I switch between these two tasks?

  • Switching between windows is the specialty of screen utility. So to switch between pine and wget window (or session) press CTRL+a followed by n key (first hit CTRL+a, releases both keys and press n).
  • To list all windows use the command CTRL+a followed by ” key (first hit CTRL+a, releases both keys and press ” ).
  • To switch to window by number use the command CTRL+a followed by ‘ (first hit CTRL+a, releases both keys and press ‘ it will prompt for window number).

Common screen commands

screen command Task
Ctrl+a c Create new window
Ctrl+a k Kill the current window / session
Ctrl+a w List all windows
Ctrl+a 0-9 Go to a window numbered 0 9, use Ctrl+a w to see number
Ctrl+a Ctrl+a Toggle / switch between the current and previous window
Ctrl+a S Split terminal horizontally into regions and press Ctrl+a c to create new window there
Ctrl+a :resize Resize region
Ctrl+a :fit Fit screen size to new terminal size. You can also hit Ctrl+a F for the the same task
Ctrl+a :remove Remove / delete region. You can also hit Ctrl+a X for the same taks
Ctrl+a tab Move to next region
Ctrl+a D (Shift-d) Power detach and logout
Ctrl+a d Detach but keep shell window open
Ctrl-a Ctrl-\ Quit screen
Ctrl-a ? Display help screen i.e. display a list of commands

Suggested readings:

See screen command man page for further details:
man screen