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docker run进去容器，exit退出，容器停止

run运行进去容器，ctrl+p+q退出，容器不停止。如果加了-d,就守护式启动容器，exit的命令，容器是不会停止的

exec进的容器，exit或者是ctrl+d,容器不会停止.只是退出

[root@zk117 ~]# docker run -it --name="ub1" ubuntu bash
root@03633ca3e9ed:/# exit
exit
[root@zk117 ~]# docker ps
CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES
[root@zk117 ~]# [root@zk117 ~]# docker run -it -d  --name="ub2" ubuntu bash
b54e73897260d028cce5e1f4a715b4e22f74690bcae1e168f36494e6fb6c7d09
[root@zk117 ~]# docker ps
CONTAINER ID   IMAGE     COMMAND   CREATED         STATUS         PORTS     NAMES
b54e73897260   ubuntu    "bash"    7 seconds ago   Up 6 seconds             ub2
[root@zk117 ~]# docker exec -it ub2
"docker exec" requires at least 2 arguments.
See 'docker exec --help'.Usage:  docker exec [OPTIONS] CONTAINER COMMAND [ARG...]Execute a command in a running container
[root@zk117 ~]# docker exec -it ub2 bash
root@b54e73897260:/# exit
exit
[root@zk117 ~]# docker ps
CONTAINER ID   IMAGE     COMMAND   CREATED         STATUS         PORTS     NAMES
b54e73897260   ubuntu    "bash"    5 minutes ago   Up 5 minutes             ub2