First shell1 - build, run, and change a running container Then shell2 - commit and enter new container

shell1

jacob@sales01:~/timebuild$ cat Dockerfile
FROM ubuntu
ADD . /foo
jacob@sales01:~/timebuild$ sudo docker build -t commitbuild .
Uploading context 10.24 kB
Uploading context
Step 1 : FROM ubuntu
 ---> 8dbd9e392a96
Step 2 : ADD . /foo
 ---> d4e96c9ed83a
Successfully built d4e96c9ed83a
jacob@sales01:~/timebuild$ sudo docker run -i -t commitbuild /bin/bash
root@b11c28d141e8:/# ls
bin  boot  dev  etc  foo  home  lib  lib64  media  mnt  opt  proc  root  run  sbin  selinux  srv  sys  tmp  usr  var
root@b11c28d141e8:/# echo "change" > change
root@b11c28d141e8:/#

shell2

jacob@sales01:~$ sudo docker ps
CONTAINER ID        IMAGE                COMMAND             CREATED             STATUS              PORTS               NAMES
b11c28d141e8        commitbuild:latest   /bin/bash           32 seconds ago      Up 31 seconds                           hopeful_galileo
jacob@sales01:~$ sudo docker commit b11c28d141e8
8a10d9332ea6c3686145e59095f1e4fbd9ad3b4962295861b65d51f02532dd09
jacob@sales01:~$ sudo docker run -i -t 8a10d9332ea6c3686145e59095f1e4fbd9ad3b4962295861b65d51f02532dd09 /bin/bash
root@666254c0005e:/# cat change
change
root@666254c0005e:/#