Usage: enroot exec [options] [--] PID COMMAND [ARG...]
Execute a command inside an existing container.
Options:
-e, --env KEY[=VAL] Export an environment variable inside the container
Execute a command inside an existing container referred to by a proccess identifier.
The process identifier of a container can be obtained using the list command.
# Start an alpine container, print its process identifier and sleep forever.
$ enroot start alpine sh -c 'echo $$; sleep infinity'
12019
# Execute bash inside the running container.
$ enroot exec 12019 bash