Lnxgeek.org Wiki - Freedom of choice, I choose Freedom

Put this into ~/.bashrc then everytime you ssh to a host it will startup a screen session or resume one. This way you will not loss work when connection is broken.

ssh() {
  if [[ "$2" == "" ]]; then
    command ssh "$1" -Xt screen -aAdr -RR work bash
  else
    command ssh $@
  fi
}

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Source:http://profarius.com/content/persistent-ssh