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Simple SSH script

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# 1  
Old 11-05-2009
Simple SSH script
I have several unix servers,
I need to logon to each server and find out if an id exists on that server.
I need a simple script for this, i have come up with the following script, but I cannot bring the output of a child process on the remote server.
HTML Code:
for i in `cat SERVER_LIST`
do
ssh $i <<EOF>> server_idchk4user_$sysid.log
id $1
if [ $? = 0 ];then
echo "I have a login on $i server"
else
echo "I do not have a login on $i server"
exit
EOF
done


Any help s greatly appreciated.
# 2  
Old 11-06-2009
Why login?

You can run commands on the remote machines without logging in through a script.

Code:
ssh myacct@machine id
echo $?
0
ssh noacct@machine id
echo $?
255

# 3  
Old 11-06-2009
Thanks for the reply Tony!

I wanted to enhance the script in future,
saylike i needed to know what sudo privileges does the id have on remeote machine, that is why I wanted to login thru a script

there are several issues, I'm describing them down here.

1) there are like 300 servers in the SERVER_LIST file.On each server I should find if an ID exists or not.

2) Everytime the script executes It prompts me for a password. How to overcome this, I tried it with expect, but have no experience using expect.

3) ssh noacct@machine id
It prompts for a password again and again, I cannot execute echo $? (since its prompting for password again and again)

Thankyou for the help. I greatly appreciate.
# 4  
Old 11-06-2009
ssh keys are your friend. If you have 300 servers though thats going to take some work to get them setup though.
# 5  
Old 11-06-2009
Quote:
Originally Posted by ramky79
2) Everytime the script executes It prompts me for a password. How to overcome this, I tried it with expect, but have no experience using expect.
I agree with ssh keys. I set up my first auto-login script last night using this site as reference. It's really easy, but I was doing it on 298 less computers..
# 6  
Old 11-09-2009
Also: if you are going to be doing a lot of this, you might look at "expect" - not for logging in (ssh keys is the right choice there) but for handling more complex situations after login.
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