====== screen ======
<blockquote>GNU Screen is a software application that can be used to multiplex several virtual consoles, allowing a user to access multiple separate terminal sessions inside a single terminal window or remote terminal session.</blockquote>

===== Start screen =====

  screen
  
===== Detach from Session =====

  CTRL+a , d
  
===== Attach to Session =====

  screen -r -S <name>

like

  screen -r -S postalcodes


===== Start Application in screen Session =====

  screen -dmS postalcodes bash -c "cd /opt/postalcodes && exec java -jar postalcode.jar server config.yml"

This starts a screen session with the name ''postalcodes'', changes the current directory to ''/opt/postalcodes'' and starts the [[dropwizard|Dropwizard]] server application //postalcodes// with the parameters //server// and //config.yml//.

This is useful for applications which tend to output things on ''stdout'' or ''stderr'' because the terminal session is not ended by leaving because you can detach from and attach to the session.



{{tag>linux}}