You are viewing a plain text version of this content. The canonical link for it is here.
Posted to mapreduce-user@hadoop.apache.org by Gaurav Dasgupta <gd...@gmail.com> on 2013/02/14 15:51:03 UTC
How to add users in supergroup?
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
Re: How to add users in supergroup?
Posted by Gaurav Dasgupta <gd...@gmail.com>.
OK. Thanks a lot. Understood now.
On Thu, Feb 14, 2013 at 10:25 PM, Chris Embree <ce...@gmail.com> 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 <gd...@gmail.com>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
>>
>
>
Re: How to add users in supergroup?
Posted by Gaurav Dasgupta <gd...@gmail.com>.
OK. Thanks a lot. Understood now.
On Thu, Feb 14, 2013 at 10:25 PM, Chris Embree <ce...@gmail.com> 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 <gd...@gmail.com>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
>>
>
>
Re: How to add users in supergroup?
Posted by Gaurav Dasgupta <gd...@gmail.com>.
OK. Thanks a lot. Understood now.
On Thu, Feb 14, 2013 at 10:25 PM, Chris Embree <ce...@gmail.com> 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 <gd...@gmail.com>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
>>
>
>
Re: How to add users in supergroup?
Posted by Gaurav Dasgupta <gd...@gmail.com>.
OK. Thanks a lot. Understood now.
On Thu, Feb 14, 2013 at 10:25 PM, Chris Embree <ce...@gmail.com> 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 <gd...@gmail.com>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
>>
>
>
Re: How to add users in supergroup?
Posted by Chris Embree <ce...@gmail.com>.
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 <gd...@gmail.com> 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
>
Re: How to add users in supergroup?
Posted by Chris Embree <ce...@gmail.com>.
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 <gd...@gmail.com> 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
>
Re: How to add users in supergroup?
Posted by Chris Embree <ce...@gmail.com>.
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 <gd...@gmail.com> 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
>
Re: How to add users in supergroup?
Posted by Chris Embree <ce...@gmail.com>.
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 <gd...@gmail.com> 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
>