OK. Thanks a lot. Understood now. On Thu, Feb 14, 2013 at 10:25 PM, Chris Embree <[email protected]> wrote:
> Check your HDFS config file for the groupname you used as HDFS supergroup. > We used hdfs as the group name in our case. > > Then just groupadd hdfs (see man groupadd for additional options) > Then, when you create users, add them to that group. > > useradd -G hdfs newuser > > This is more Linux admin than Hadoop centric. > > > On Thu, Feb 14, 2013 at 9:51 AM, Gaurav Dasgupta <[email protected]>wrote: > >> Hi All, >> >> I have Hadoop installed in my CentOS Linux cluster. I am trying to >> understand that what are the various ways I can set user level and group >> level permissions for read/write in HDFS. >> I have set 770 permission to the some HDFS directory which has the >> owner:group = hadoop:supergroup. >> >> My intension is now to add all those users in "supergroup" whom I want to >> access the HDFS directory. But, I could not find supergroup in "/etc/group" >> . >> What is "supergroup"? How can I add users to "supergroup"? >> >> Thanks, >> Gaurav >> > >
