I am trying to automate running commands with docker exec. I have an example of a command that works from the command line, but can't get working in Docker.DotNet. With my container already running I opened a command line and ran: docker exec -it containerId bash -c "apt-get update". This command is successful and I can see the output from the command in the terminal window.

Then, I tried doing the same as:

ContainerExecCreateParameters execParams = new()
{
    AttachStderr = true,
    AttachStdout = true,
    Cmd = new[] { "//bin//bash", "apt-get update" }
};
    
var exec = await this.dockerClient.Exec.ExecCreateContainerAsync(containerId, execParams);
var stream = await this.dockerClient.Exec.StartAndAttachContainerExecAsync(exec.ID, false);
var output = await stream.ReadOutputToEndAsync(new CancellationToken());

Instead of getting the exepected output of apt-get update, I get the error message: (OCI runtime exec failed: exec failed: unable to start container process: exec: "apt-get update": executable file not found in $PATH: unknown , ).

I believe this error may be due to trying to execute the command not in the bash shell, but haven't found any examples or docs that demonstrate how to properly execute a command in the bash shell using Docker.DotNet.