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Help with login script.

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# 1  
Old 03-19-2013
Help with login script.
Guys I need to write a script that will login to over 480 servers and run the last -n 45 "userid" | tail -1. OK, I am terrible at writting scripts. So I need the script to run this command and forward the output to my main server in /var/tmp/output. PLEASE HELP. Smilie
# 2  
Old 03-19-2013
Secure Shell (SSH) would be an option. If you have ssh-keys setup, then you can use SSH to run remote commands.

Syntax:
Code:
ssh [user@]hostname [command]

# 3  
Old 03-19-2013
Ok, so your saying something like this should work for 480 boxes?

ssh [user@]hostname last -n 45 "userid" | tail -1?
Will this work if I put in a shell script like the above?
# 4  
Old 03-19-2013
Yes, should work in script, but you'll need to set up passwordless authentication on your hosts or it will demand a password for every login.

Also, put quotes around the pipe so it gets executed on the remote side instead of the local.

Code:
ssh user@host last -n 45 "userid" "|" tail -n 1

# 5  
Old 03-19-2013
Yes, if you have all the user name and host name listed in a file, then use a while loop and run remote command
Code:
while read user hostname
do
   ssh -n "${user}@${hostname}" last -n 45 "userid" "|" tail -n 1
done < listfile

Use -n option to make it work in a loop.
This User Gave Thanks to Yoda For This Post:
terrywhitejr
# 6  
Old 03-19-2013
SWEET!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

---------- Post updated at 12:37 PM ---------- Previous update was at 12:30 PM ----------

I said that before I thought about it. I only have one user that has a ssh key setup. I want this user to ssh to all boxes and run the command.
# 7  
Old 03-19-2013
So simply login as this user who has ssh-keys setup done.

Write & run the script from this user account.
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