= 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 ||