How to disable the requirement of ssh

[Bin YANG <ya...@gmail.com>]

Dear colleagues,

As we know, hadoop uses ssh to connect other nodes. It is a little
inconvenient, because it requires me type the password for each nodes.

I find ssh can disable the password requirement for localhost in
"Hadoop quick start", is there a way to disable the password
requirement of ssh for other nodes?

Thanks!

Best wishes,
Bin YANG



-- 
Bin YANG
Department of Computer Science and Engineering
Fudan University
Shanghai, P. R. China
EMail: yangbinisme82@gmail.com

Re: How to disable the requirement of ssh

[Ted Dunning <td...@veoh.com>]

Also read the manual section for ssh.


On 1/23/08 7:26 AM, "Sagar Naik" <sa...@visvo.com> wrote:

> Hi,
> 
> http://wiki.apache.org/nutch/NutchHadoopTutorial
> Pl go to the section :
> 
> 
>       Setting Up The Deployment Architecture
> 
> 
> - Sagar
> Bin YANG wrote:
>> Dear colleagues,
>> 
>> As we know, hadoop uses ssh to connect other nodes. It is a little
>> inconvenient, because it requires me type the password for each nodes.
>> 
>> I find ssh can disable the password requirement for localhost in
>> "Hadoop quick start", is there a way to disable the password
>> requirement of ssh for other nodes?
>> 
>> Thanks!
>> 
>> Best wishes,
>> Bin YANG
>> 
>> 
>> 
>>   
> 

Re: How to disable the requirement of ssh

[Sagar Naik <sa...@visvo.com>]

Hi,

http://wiki.apache.org/nutch/NutchHadoopTutorial
Pl go to the section :


      Setting Up The Deployment Architecture


- Sagar
Bin YANG wrote:
> Dear colleagues,
>
> As we know, hadoop uses ssh to connect other nodes. It is a little
> inconvenient, because it requires me type the password for each nodes.
>
> I find ssh can disable the password requirement for localhost in
> "Hadoop quick start", is there a way to disable the password
> requirement of ssh for other nodes?
>
> Thanks!
>
> Best wishes,
> Bin YANG
>
>
>
>   


-- 
This message has been scanned for viruses and
dangerous content and is believed to be clean.

Re: How to disable the requirement of ssh

[Ted Dziuba <te...@persai.com>]

You can use public keys and ssh-agent. This page might help:

http://sial.org/howto/openssh/publickey-auth/

Ted

Bin YANG wrote:
> Dear colleagues,
>
> As we know, hadoop uses ssh to connect other nodes. It is a little
> inconvenient, because it requires me type the password for each nodes.
>
> I find ssh can disable the password requirement for localhost in
> "Hadoop quick start", is there a way to disable the password
> requirement of ssh for other nodes?
>
> Thanks!
>
> Best wishes,
> Bin YANG
>
>
>
>   

Re: How to disable the requirement of ssh

[Amar Kamat <am...@yahoo-inc.com>]

1. For key-pair generation :
ssh-keygen -t dsa -P '' -f ~/.ssh/id_dsa
2. For localhost sshless :
 cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys
3. For password less ssh across machines : (you need to type your 
password once for the first time)
 cat ~/.ssh/id_dsa.pub | ssh user@machine "cat - >> ~/.ssh/authorized_keys"
Basically your 'public key' should be copied to the 'authorized_keys' 
file on all the machines.
4. Btw you might want to avoid the "yes/no" question when you do ssh, 
for that add the following lines to ~/.ssh/config
{code}
StrictHostKeyChecking no
NoHostAuthenticationForLocalhost yes
{code}
Btw if your home NFS mounted then no need to copy the keys (i.e skip step 3)
Amar

Bin YANG wrote:
> Dear colleagues,
>
> As we know, hadoop uses ssh to connect other nodes. It is a little
> inconvenient, because it requires me type the password for each nodes.
>
> I find ssh can disable the password requirement for localhost in
> "Hadoop quick start", is there a way to disable the password
> requirement of ssh for other nodes?
>
> Thanks!
>
> Best wishes,
> Bin YANG
>
>
>
>