Normally you can enter a Docker container with this command:
docker exec -it <containerID> bash
It is possible you receive an error that says 'exec "bash": executable file not found in $PATH'
The root cause could be related to insufficient disk space on the Docker host. Delete files or otherwise make room (e.g., add disk space). Then stop the container with this command: docker stop <containerID>
Finally, restart the container with this command: docker start <containerID>
Now you should be able to enter the container.