How to access to a file in docker container already exit?

Question

I create a file hello.txt:

docker run centos6-ssh echo "hello world" > /root/hello.txt

docker will create a container,excecute the command,and the container exit. probblem is that how do i access the file?

in case of container exit,the right way to use container is run a container with ssh service background(-d args)?

Answer 1

The right way is to just use the docker cp command. After your container exited you can get it's id by doing docker ps -a. Note the id of the container then do:

docker cp <container_id>:/root/hello.txt .