当命令sudo docker ps -a抛出容器列表时，我感到很惊讶：
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
efd4879e92e0 ubuntu "/bin/bash" About an hour ago Exited (0) 20 minutes ago elated_newton
7db432be894c ubuntu "/bin/bash" About an hour ago Exited (0) 18 minutes ago nervous_meninsky
aef01293fdc9 ubuntu "/bin/bash" About an hour ago Up About an hour priceless_ramanujan
87cfd461b465 ubuntu "/bin/bash" About an hour ago Up About an hour festive_bhabha
1dcb6f9618d8 ubuntu "/bin/bash" About an hour ago Up About an hour mystifying_poitras
0f1636eb9cc1 hello-world "/hello" About an hour ago Exited (0) About an hour ago sharp_murdock
2a3a1fb03ada hello-world "/hello" About an hour ago Exited (0) About an hour ago admiring_brattain
77c8e7ef5770 hello-world "/hello" 16 hours ago Exited (0) 16 hours ago unruffled_shannon
808805085c59 centos "6.9" 17 hours ago Created youthful_aryabhata
a1438a7811c2 centos "/bin/bash" 17 hours ago Exited (0) 17 hours ago sleepy_neumann
fce6a95f8f5a ubuntu "/bin/bash" 17 hours ago Exited (0) 17 hours ago cranky_ritchie
e17b5f98bbc5 ubuntu "/bin/bash" 17 hours ago Exited (0) 17 hours ago unruffled_ritchie
cafbbe52dad5 hello-world "/hello" 17 hours ago Exited (0) 17 hours ago hungry_pike
d40ac9c16e9c ubuntu "/bin/bash" 17 hours ago Exited (0) 17 hours ago brave_babbage
5efd22250d0e ubuntu "/bin/bash" 17 hours ago Exited (0) 17 hours ago confident_lalande
471e22652bc3 ubuntu "/bin/bash" 17 hours ago Exited (0) 17 hours ago vigorous_wing
b68f43ebae50 ubuntu "bash" 17 hours ago Exited (127) 17 hours ago confident_euler
a83eae486f76 ubuntu "bash" 17 hours ago Exited (0) 17 hours ago infallible_murdock
88b3b4e73e5e hello-world "/hello" 17 hours ago Exited (0) 17 hours ago thirsty_bhabha
deb88e38d347 hello-world "/hello" 17 hours ago Exited (0) 17 hours ago nervous_ptolemy
当他们发现其中一些人活着时，我感到很惊讶。由于festive_bhabha已经上线，我想加入它：
sudo docker attach festive_bhabha
但命令不打印任何内容而不返回。为什么我无法连接到容器？
答案 0 :(得分：0)
Docker容器存在时不会自动删除。您可以使用以下方法清理悬空图像，退出容器......
docker system prune
Docker容器festive_bhabha似乎是一个可能无法生成和输出的ubuntu映像，这解释了为什么在运行attach命令时没有显示输出。
您可以通过运行以下命令来检查此容器中正在运行的进程：
docker container top festive_bhabha
或者，您可以在容器内执行。
docker exec -it festive_bhabha bash