Run bash in a new or existing container

docker_bash_exec

#!/bin/sh
# Run bash within an already-running container
# arg1 - ID or nickname of a running container
if [ "'${COLUMNS}x'" = "'x'" ]; then
  echo Please 'export COLUMNS' before running this script.
else
 sudo docker exec -ti $1 bash -c "export TERM=xterm; export COLUMNS=$COLUMNS; /bin/bash"
fi

docker_bash_run

#!/bin/sh
# Run a container and remove the volume when it exits
# arg1 - name or name:tag of an image
if [ "'${COLUMNS}x'" = "'x'" ]; then
  echo Please 'export COLUMNS' before running this script.
else
 sudo docker run --rm -ti $1 bash -c "export TERM=xterm; export COLUMNS=$COLUMNS; /bin/bash"
fi