} else if ("info".equals(command)) {
return new InfoExe();
} else if ("cp".equals(command)) {
return new CpExe();
} else if ("mv".equals(command)) {
return new MvExe();
} else if ("echo".equals(command)) {
return new EchoExe();
} else if ("pos".equals(command)) {
return new PosExe();
} else if ("lslns".equals(command)) {