Linux服務器Docker卸載某個鏡像：
首先輸入命令docker images查看當前docker下有多少鏡像：
1 [root@iZwz9a191mdam4di3dozk3Z ~]# docker images 2 REPOSITORY TAG IMAGE ID CREATED SIZE 3 mysql 5.6 a46c2a2722b9 4 days ago 256MB 4 hello-world latest 4ab4c602aa5e 7 weeks ago 1.84kB 5 morunchang/fastdfs latest a729ac95698a 2 years ago 460MB
1 [root@iZwz9a191mdam4di3dozk3Z ~]# docker images 2 REPOSITORY TAG IMAGE ID CREATED SIZE 3 mysql 5.6 a46c2a2722b9 4 days ago 256MB 4 hello-world latest 4ab4c602aa5e 7 weeks ago 1.84kB 5 morunchang/fastdfs latest a729ac95698a 2 years ago 460MB
如上所示可以看到當前docker下有3個鏡像：mysql、hello-world、morunchang/fastdfs，現在我們假設要刪除hello-world這個鏡像，使用如下流程以及命令：
使用命令docker ps -a查看當前運行下的鏡像進程：
1 [root@iZwz9a191mdam4di3dozk3Z ~]# docker ps -a 2 CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 3 e061047acf6e mysql:5.6 "docker-entrypoint.s…" 2 hours ago Up 2 hours 0.0.0.0:3306->3306/tcp mysqlserver 4 61c7a4d6363d mysql:5.6 "docker-entrypoint.s…" 2 hours ago Created compassionate_varahamihira 5 024c06fcc1e8 morunchang/fastdfs "sh storage.sh" 3 days ago Up 3 days storage 6 3f2da1b259b5 morunchang/fastdfs "sh tracker.sh" 3 days ago Up 3 days tracker 7 c608062bf46f hello-world "/hello" 4 days ago Exited (0) 4 days ago priceless_keller
1 [root@iZwz9a191mdam4di3dozk3Z ~]# docker ps -a 2 CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 3 e061047acf6e mysql:5.6 "docker-entrypoint.s…" 2 hours ago Up 2 hours 0.0.0.0:3306->3306/tcp mysqlserver 4 61c7a4d6363d mysql:5.6 "docker-entrypoint.s…" 2 hours ago Created compassionate_varahamihira 5 024c06fcc1e8 morunchang/fastdfs "sh storage.sh" 3 days ago Up 3 days storage 6 3f2da1b259b5 morunchang/fastdfs "sh tracker.sh" 3 days ago Up 3 days tracker 7 c608062bf46f hello-world "/hello" 4 days ago Exited (0) 4 days ago priceless_keller
如上所示，我們看到hello-world相關的鏡像信息如下：
1 c608062bf46f hello-world "/hello" 4 days ago Exited (0) 4 days ago priceless_keller
然后我們停止hello-world運行的進程，使用如下命令docker stop c608062bf46f：
1 [root@iZwz9a191mdam4di3dozk3Z ~]# docker stop c608062bf46f 2 c608062bf46f
停止了鏡像的運行后，就可以卸載了。使用命令docker rm c608062bf46f來刪除這個鏡像。
1 [root@iZwz9a191mdam4di3dozk3Z ~]# docker rm c608062bf46f 2 c608062bf46f
這里的“c608062bf46f”是docker ps -a 里面的CONTAINER ID，然后這個鏡像就進程就刪除。
我們使用docker ps -a命令查看當前進程里面是否還有hello-world相關的進程：
1 [root@iZwz9a191mdam4di3dozk3Z ~]# docker ps -a 2 CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 3 e061047acf6e mysql:5.6 "docker-entrypoint.s…" 2 hours ago Up 2 hours 0.0.0.0:3306->3306/tcp mysqlserver 4 61c7a4d6363d mysql:5.6 "docker-entrypoint.s…" 2 hours ago Created compassionate_varahamihira 5 024c06fcc1e8 morunchang/fastdfs "sh storage.sh" 3 days ago Up 3 days storage 6 3f2da1b259b5 morunchang/fastdfs "sh tracker.sh" 3 days ago Up 3 days tracker
此時發現沒有hello-world相關的進程了。
這時我們使用docker images查看下鏡像的IMAGE ID，進行最后的刪除。
1 [root@iZwz9a191mdam4di3dozk3Z ~]# docker images 2 REPOSITORY TAG IMAGE ID CREATED SIZE 3 mysql 5.6 a46c2a2722b9 4 days ago 256MB 4 hello-world latest 4ab4c602aa5e 7 weeks ago 1.84kB 5 morunchang/fastdfs latest a729ac95698a 2 years ago 460MB
使用命令docker rmi 4ab4c602aa5e刪除鏡像：
1 [root@iZwz9a191mdam4di3dozk3Z ~]# docker rmi 4ab4c602aa5e 2 Untagged: hello-world:latest 3 Untagged: hello-world@sha256:0add3ace90ecb4adbf7777e9aacf18357296e799f81cabc9fde470971e499788 4 Deleted: sha256:4ab4c602aa5eed5528a6620ff18a1dc4faef0e1ab3a5eddeddb410714478c67f 5 Deleted: sha256:428c97da766c4c13b19088a471de6b622b038f3ae8efa10ec5a37d6d31a2df0b
在使用docker images查看下是否刪除掉了hello-world：
1 [root@iZwz9a191mdam4di3dozk3Z ~]# docker images 2 REPOSITORY TAG IMAGE ID CREATED SIZE 3 mysql 5.6 a46c2a2722b9 4 days ago 256MB 4 morunchang/fastdfs latest a729ac95698a 2 years ago 460MB
此時可以看到，hello-world這個鏡像刪除成功了，已經沒有hello-world這個鏡像了。
其他的鏡像刪除也是使用同樣的步驟。