loop through the accounts and servers

[pareshan]

Hi everyone, I am trying to use loop (for loop but can be any loop) which will read from the file (text file) which will have 2 column one for account and another for server which kind of look like this

account1 server1
account2 server2
account3 server1
account4 server1
5 server3
6 server2
7 server2
8 server3
9 server4
10 server4

now here I have to run couple of ksh scripts which i wrote (example tar, stop, start). I have to read from the text file and using those accounts and respective servers I have to login and run those scripts one at a time for all the accounts and respective servers.

If there are 10 accounts they may be in 3 or 4 differnt servers but thats not a big issue I can put that in some sequence if needed. Write now I am doing it using multiple text files. If I have accounts in 5 servers then I put five text files where I put accounts name and loop through them using resepctive server but I need some way to do that using one text file as I have written before.

I hope I made it clear this time if not i will try to elaborate more later on

I will really appreciate any help
thanks alot

[Steven E. Protter]

Shalom,

Can I see the code you are using.

I'd suggest two loops and two files, one for server the second for accounts within the server.

But to see where your code is going wrong, I kind of need to see it.

SEP

[James R. Ferguson]

Hi:

Using 'remsh' or better yet, 'ssh' you could do something like:

#!/usr/bin/sh
while read ACCT HOST X do
ssh -n ${ACCT}@${HOST} 'uname -a'
done < accts_and_servers

...where the 'accts_and_servers' file looks like your two-column file as posted. Substitute whatever script or commands you need in place of 'uname -a' in the sample script.

Regards!

...JRF...

[pareshan]

Hi james, could you make me more clear plz
I am little bit confused may be I dint understand all the code

thank you

Steven,

Till now Im just doing for one server
for account in `cat list`
do
run scripts
done < list1

this works fine for the current server coz we dont have to login and all coz its local system but i want to do the same for the accounts in other than the local server and loop through it so that for example
if act1 is in server5 it should connect first using that account name and the server name and run those scripts over there and go for another account from the list with the respective server

thanks alot

[James R. Ferguson]

Hi (again):

> Hi james, could you make me more clear plz
I am little bit confused may be I dint understand all the code

The suggested code reads:

while read ACCT HOST X do
ssh -n ${ACCT}@${HOST} 'uname -a'
done < accts_and_servers

This reads a file called 'accts_and_servers' which consists of whitespace-delimited fields. The First field is an account and the second a server hostname. Any additional fields are ignored. The loop reads the file and runs a secure-shell command to each account/server pair. The command, in this example, is simply a request to return the server's 'uname' information.

Regards!

...JRF...

[pareshan]

James,
can i do that using rlogin instead of ssh because some of the servers and accounts are set such a way that I only login using rlogin if i do ssh it prompt for password and I cant make it automated using public key private key also.

like
rlogin server_name -l account_name 'script name'
If not how can i run command inside those server accounts using remsh will help?
thanks

[Dennis Handly]

>can I do that using rlogin instead of ssh

You'll need to use remsh instead.
remsh server_name -l account_name 'script name'

For -l account_name to work, you would have to be in the ~account_name/.rhosts file.

[Elmar P. Kolkman · Accepted solution]

First: don't forget the -n to remsh, otherwise it will only run the first line of your account/server list.
Second: I would strongly suggest to look into the ssh solution... It's more robust then remsh and a lot more secure...

If you take SEP's solution and replace the ssh command to:
cat accounts_and_servers | while read ACCOUNT HOST X
do
remsh $HOST -l $ACCOUNT -n "uname -a"
done

It will work this way.
If you have a script you want to distribute and run, change the remsh to these 3 lines:
rcp script $ACCOUNT@$HOST:/tmp
remsh $HOST -l $ACCOUNT -n /tmp/script
remsh $HOST -l $ACCOUNT -n rm /tmp/script

You might even try:
cat script | remsh $HOST -l $ACCOUNT /bin/sh

[pareshan]

Though what im saying wont solve my problem completely but I have tried to use two loops here because in my list there are some of the account which resides in the local server so I dont have to remsh for that. So i tried to match those accounts and run locally and for rest of the accounts do remsh but even if the account is not in the list
its doing the same thing its supposed to go inside else statement but its not.
this is my code.

while read Account Host X

do
if [ ${Account}="account1" || "account5" ]; then
${script} -a script -p "${WORK_PATH}stop" -c specific -l ${Account}
${script} -a script -p "${WORK_PATH}start" -c specific -l ${Account}
else
remsh ${Host} -l ${Account} -n 'compile'
fi
done < list1

I am not able to find the problem here. help plz
thanks

[James R. Ferguson]

Hi:

Change the 'if' to:

if [ ${Account} = "account1" -o ${Account} = "account5" ]; then

Regards!

...JRF...