chaos-daemon sometimes needs to run some logic inside another namespace/cgroup.
We can write these logic inside this helper, and execute them through nsexec.

Usage:
  cdh [command]

Available Commands:
  completion            Generate the autocompletion script for the specified shell
  help                  Help about any command
  normalize-volume-name get the device name from the path

Flags:
  -h, --help   help for cdh

Use "cdh [command] --help" for more information about a command.