Command constructs an *exec.Cmd object.

CreateRootfs creates the default u-root file system.

NetInit is u-root network initialization.

FIX ME: make it not linux-specific RunCommands runs commands in sequence.

SetEnv sets the default u-root environment.

WaitOrphans waits for all remaining processes on the system to exit.

WithArguments adds command-line arguments to a command.

WithCloneFlags adds clone(2) flags to the *exec.Cmd.

WithTTYControl turns on controlling the TTY on this command.

CommandModifier makes *exec.Cmd construction modular.