Inspect the docker container:

$ docker container exec 

This command allows you to enter a running container's namespaces with a new process.

Remove the stopped containers. The following command removes any stopped containers, unused volumes and networks, and dangling images:

$ docker system prune

Stop the docker containers by running this command

$ docker container stop [container id]

Get a list of the running docker containers

$ docker container ls

ubuntu apt-get update Error while moving old database out of the way

sudo touch /var/cache/app-info/xapian/default

python class __ or private class component

When any class component has a name starting with two underscores (__), it becomes private - this means that it can be accessed only from within the class.

python find length of stack

class Stack:

    def __init__(self):

        self.stackList = [1,2,3]

stackObject = Stack()

print(len(stackObject.stackList))