My private screen session for shared shell environments

my-screen.sh

#!/bin/bash

set -e

NAMESPACE=${NAMESPACE:-default}

echo "************************************************************************************************************"
echo "This screen session is for namespace \"${NAMESPACE}\" "
echo "If you are not the owner of this namespace please exit now (Ctrl-C) , thanks :)"
echo "If you want to use your own screen namespace, use: NAMESPACE=youname $0"
echo "Press ENTER to continue or Ctrl-C to exit"
echo "************************************************************************************************************"
read

export HISTFILE=/home/$USER/.bash_history_${NAMESPACE}
touch "${HISTFILE}"
screen -dr "${NAMESPACE}" || screen -S ${NAMESPACE}