Screens Summary Page

For HPF we are using screens so that the instrument PI can see what actions we are taking and we can share in real time the instrument control.

To see a list of the screen sessions do a screen -ls (after you have looged into hpf with ssh hpf@hpf ). You will see a list such as:

        12324.pts-18.hpfserver  (Detached)
        10291.TIMS      (Detached)
        9904.ArchiveCopy        (Detached)
        31564.scripts   (Attached)
        26518.hpf       (Attached)
        9772.tmc        (Detached)
        12983.QuickLook (Detached)
        6282.DataCopyingSession (Detached)

Select a screen to attach to by using the -x option and then the name of the screen for example: screen -x TIMS

The command above gets you into the hpf HET client sessioon: screen -x TIMS

The command we need to get into the hpf scripts session is: screen -x scripts

Once you are connected to a screen session you can move between different windows with a <cntrl>a n.

To end the screen session close the xterm/tab or do a <cntrl>a d. or simply close the terminal window with the X in the upper right corner. Do not do a <cntrl> d

Below is a list some of the screen short cuts that might be useful.

Key	Action	Notes
Ctrl+a <esc>	enter copy mode to allow you to arrow up to old messages	<esc> <esc> to exit this mode.
Ctrl+a c	new window
Ctrl+a n	next window
Ctrl+a p	previous window
Ctrl+a "	select window from list
Ctrl+a Ctrl+a	previous window viewed
Ctrl+a S	split terminal horizontally into regions	Ctrl+a c to create new window there
Ctrl+a |	split terminal vertically into regions	Requires screen >= 4.1
Ctrl+a :resize	resize region
Ctrl+a :fit	fit screen size to new terminal size	Ctrl+a F is the same. Do after resizing xterm
Ctrl+a :remove	remove region	Ctrl+a X is the same
Ctrl+a tab	Move to next region
Ctrl+a d	detach screen from terminal	Start screen with -r option to reattach
Ctrl+a A	set window title
Ctrl+a x	lock session	Enter user password to unlock
Ctrl+a [	enter scrollback/copy mode	Enter to start and end copy region. Ctrl+a ] to leave this mode
Ctrl+a ]	paste buffer	Supports pasting between windows
Ctrl+a >	write paste buffer to file	useful for copying between screens
Ctrl+a <	read paste buffer from file	useful for pasting between screens
Ctrl+a ?	show key bindings/command names	Note unbound commands only in man page
Ctrl+a :	goto screen command prompt	up shows last command entered