在docker命令中使用$（）似乎不起作用

Question

I want to stop all running docker containers with the command sudo docker stop $(docker ps -a -q) . But when I run it, docker outputs

Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get http://%2Fvar%2Frun%2Fdocker.sock/v1.39/containers/json?all=1: dial unix /var/run/docker.sock: connect: permission denied
"docker stop" requires at least 1 argument.
See 'docker stop --help'.

Usage:  docker stop [OPTIONS] CONTAINER [CONTAINER...]

Stop one or more running containers

Just running docker ps -a -q outputs the Docker IDs, but when I combine it with a Docker command, it doesn't work. Thank you.

Answer 1

Aren't you trying to run docker ps -a -q and docker stop $(docker ps -a -q) in two different consoles/users? The error shown is in fact two different errors:

1. docker ps -q -a cannot complete due to insufficient permissions
2. docker stop ... gets empty argument list due to error in subshell

Edit: If using sudo each command is running in different shell/subshell which inherits privileges/environment. But the subshells are invoked in order from the outermost. So the script will be invoket in order docker ps and then sudo docker stop . The first one will not have privileges elevated.

Answer 2

我没有意识到在命令替换中还需要sudo：

sudo docker stop $(stop docker ps -a -q)