[Beowulf] cannot add service rlogin, rexec

Swati Longia swati_longia at sifycorp.com
Wed Mar 1 22:31:26 PST 2006

Hi Robert

Thanks for your help.
I am using ssh now.
I have made the appropriate entries in shosts files also, but still on 
executing it asks me for passwords :(

Thanks n Regards

Robert G. Brown wrote:

> On Tue, 28 Feb 2006, Swati Longia wrote:
>> Hi All
>> I am trying to setup a demo beowulf cluster.
>> I just have two nodes a master and a slave, both have Fedora Core 2 
>> installed on it.
>> I searched on the net, found many HowTo's. I am following the one 
>> OSTG, don't know
>> who has written it. It explains how to setup the head node and the 
>> slave node separately and extensively.
>> But I am stuck at the place at which the HowTo says that the services 
>> rlogin and rexec should be up.
>> When I try to add these services by chkconfig, it throws error saying 
>> that service rlogin/rexec does not support
>> chkconfig.
>> Can someone help me out on how to proceed now.
>> Thanks in advance
>> Swati
> Several ways, but the "best" way in the short run is probably to use
> ssh/sshd.  That should be already installed, if not, it is a "yum
> install ssh\*" away.  ssh supplants the need for both of the
> rlogin/rexec services indefinitely and is secure enough not to be a
> problem (given your level of (in)experience at network services) until
> much later, when your needs and skills have grown.
> You can use ssh for pretty much anything you'd use the r-services for
> including as a vehicle for trying out MPI or PVM or socket-based
> parallel code.
>     rgb

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