$ command line cheat sheets
Cheat Sheet Title: [ no_spaces_alphanumeric_only ]
Cheat Sheet:=TO START SCREEN= $ screen $ screen -ls: to list running sessions From: http://www.amitu.com/blog/2004/12/screen-howto.html To connect to an already open session running in background, use "screen" with following options: * -D -R Attach here and now. In detail this means: If a session is running, then reattach. If necessary detach and logout remotely first. If it was not running create it and notify the user. This is the author's favorite. * -r Reattach to existing * -d -r Reattach a session and if necessary detach it first. * -d -R Reattach a session and if necessary detach or even create it first. * -d -RR Reattach a session and if necessary detach or create it. Use the first session if more than one session is available. * -D -r Reattach a session. If necessary detach and logout remotely first. * -D -RR Attach here and now. Whatever that means, just do it. * -r <PID> Reattach to the session with process ID of <PID> ---- =SCREEN COMMANDS (run within screen):= All commands called from the "meta key": C-a (ctrl+a). Note: Case-sensitive. Note: For 'old' ctrl-a, use C-a-a C-a ?: Help (shows a list of commands) (On some systems C-a h reportedly also works.) C-a c: Create new window/terminal C-a k: Kill window session C-a d: Detaches from the window C-a DD: Detaches from the window AND the ssh shell if you are in one. C-a x: Lock the current screen session with the current user's password. To select a window: C-a " (quote): List windows: (select one and press enter) C-a <digit> (the number of the screen) C-a n, C-a p: Next/Previous screen Split screens: C-a S: Split (then use C-tab, C-<num>) C-a tab: Move between splits C-a Q: Un-Split C-a :resize +N : increase current region height by N C-a :resize -N : decrease current region height by N C-a :resize N : set current region height to N C-a :resize = : make all windows equally high C-a :resize max : maximize current region height C-a :resize min : minimize current region height After creating a new window it is useful to name it: C-a A and enter a name. To create a named window directly: C-a :, and type screen <command>. Copy mode so you can scroll up and down.: C-a ESC Copy and Paste: C-a [: Enables copy mode C-a ]: Pastes buffer ('clipboard') C-a <: Copy from a file C-a >: Paste to a file Monitoring: C-a M: Toggles alert on activity C-a _ (underscore): Toggles monitor for silence C-a " (quote): Jump to alerting window ---- ==Sample ~/.screenrc== hardstatus alwayslastline ##what is displayed hardstatus string '%{= kG}[ %{G}%H %{g}][%= %{=kw}%?%-Lw%?%{r}(%{W}%n*%f%t%?(%u)%?%{r})%{w}%?%+Lw%?%?%= %{g}]' ## Default screens ## screen -t NameOfScreen ScreenNumber ShellCommand #screen -t shell1 0 #screen -t shell2 1 #screen -t server 2 ssh me@myserver ## change meta-key (ctrl-a) # escape ^gg ---- =MULTI USER= See also: kibitz (http://www.redhatmagazine.com/2007/09/27/a-guide-to-gnu-screen/#comment-25029) From: http://www.linux.com/article.pl?sid=06/08/14/1945249 Teacher: setuid root on /usr/bin/screen (NOTE! security risk, running as root?) $ chmod u+s /usr/bin/screen Teacher: To reset screen permissions after session: setuid owner $ chmod u-s /usr/bin/screen Teacher: $ screen -S SessionName. Teacher: Ctrl-a :multiuser on Teacher: Ctrl-a :acladd student_login_id Student: $ ssh student@teacherComputer Student: screen -x username/session. ---- =Serial Console Access:= OS X: screen /dev/tty.usb* <connection speed> Linux: screen /dev/ttyS[0-9] <connection speed> Typical values for connection speed are 9600 or 115200 ---- =Helpful sites:= General: http://www.rackaid.com/resources/linux-tutorials/general-tutorials/using-screen/ Tutorial: http://www.rackaid.com/resources/linux-tutorials/general-tutorials/linux-screen.cfm Multi-user: http://www.linux.com/article.pl?sid=06/08/14/1945249 ----
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