history = new InMemoryHistory(settings.getHistorySize());
completionList = new ArrayList<Completion>();
//enable completion for redirection
completionList.add(new RedirectionCompletion());
//enable aliasing
if(Settings.getInstance().isAliasEnabled()) {
aliasManager = new AliasManager(Settings.getInstance().getAliasFile());
completionList.add(new AliasCompletion(aliasManager));