} else if ("mkdir".equals(command)) {
return new MkDirExe();
} else if ("ln".equals(command)) {
return new LnExe();
} else if ("touch".equals(command)) {
return new TouchExe();
} else if ("rm".equals(command)) {
return new RmExe();
} else if ("setattr".equals(command)) {
return new SetAttrExe();
} else if ("info".equals(command)) {