On 2016年02月18日 07:49, Burton, Ross wrote: > > On 17 February 2016 at 05:40, Kang Kai > wrote: > > I prefer to keep such check. There is more than one case that > causes operation error such as pass wrong parameters. The messages > are helpful for developers. > > > In that case the groupadd will return an error code. What situations > with proper locking will result in groupadd running successfully but > the group not being added? Sorry for late reply. I think I understand your meanings. V3 will be sent. --Kai > > Ross -- Regards, Neil | Kai Kang