topic Re: How to SSH for remote execution in Operating System - HP-UX

How to SSH for remote execution

santosh jha — Thu, 08 Dec 2005 05:40:13 GMT

Hi ,

I am designing a script where i need to execute some commands on different server from one server.

Previously i was using "remsh" to accomplis this but now i have to move away from "remsh" and use "ssh" instead.

Please guide me how to do it.

Regards

Santosh Jha

Re: How to SSH for remote execution

Sivakumar TS — Thu, 08 Dec 2005 06:02:29 GMT

Dear Santosh,

Check out this link

http://www.employees.org/~satch/ssh/faq/INSTALL.txt

HtH,

Siva.

Re: How to SSH for remote execution

Senthil Prabu.S_1 — Thu, 08 Dec 2005 06:04:40 GMT

Hi,
you can use your script as before, only changing the remsh with ssh [correct syntak]. check man ssh for syntak.

Also, you can use use public key authentication using SSH which helps a lot in automation so that password less authentication happends between two machines.

Re: How to SSH for remote execution

santosh jha — Thu, 08 Dec 2005 06:14:54 GMT

Senthin could you please me the command if for example i am in "server1" logged in as "oracle" and i want to execute "ls" on "server2" with the same user on that machine.

Re: How to SSH for remote execution

Thummalu — Thu, 08 Dec 2005 07:13:22 GMT

here it is

if both the servers are having correct host based authentication keys, then
from server1

ssh -q server2 ll

will work fine :)

br
Thummalu

Re: How to SSH for remote execution

Senthil Prabu.S_1 — Thu, 08 Dec 2005 07:18:54 GMT

Hi santhosh,
ssh -l oracle server2 ls

This you have to incorpate in your script on the server1.

If you want to do many operations on remote m/c, then

ssh -l oracle server2 << EOF
ls
pwd
netstat -na
EOF

hth,
Prabu.S

If you want steps for using pasword less authentication, I can also send them

Re: How to SSH for remote execution

Arunvijai_4 — Thu, 08 Dec 2005 07:19:10 GMT

You need to work on password less authentication with SSH server and client, have a look at this thread, it will guide you

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=851253

-Arun

Re: How to SSH for remote execution

Jaroslav Matys — Fri, 09 Dec 2005 03:05:34 GMT

Just briefly:
1) Generate your identity on unix_box

If you already have created your identity (file /home/your_login/.ssh/id_rsa exists), please skip this step otherwise you will destroy your previous setup.
This setup you will do only once per user and system.

ssh-keygen -t rsa

2) Distribute your identity to other nodes
This setup you have to do for every user and system from which you want to conect for all users and systems you want to connect to :
2.1 Create .ssh directory on targer_node
ssh target_user@target_node [ ! -d /home/your_login/.ssh ] && (mkdir /home/your_login/.ssh;chmod 700 /home/your_login/.ssh)
2.2 Copy your public identity to target
cat /home/your_login/.ssh/id_rsa.pub | ssh target_user@target_node tee -a /home/your_login/.ssh/authorized_keys

3) Simply use ssh and scp or sftp
ssh target_node
ssh your_login@target_node
ssh your_login@target_node command parameter

Re: How to SSH for remote execution

Tor-Arne Nostdal — Fri, 09 Dec 2005 11:34:20 GMT

Just a small comment to Jaroslav's nice description.
Substitute: /home/your_login
with: ~your_login

~your_login will point to the home-directory of user your_login regardless if it is on /home or elsewhere...

/2r