who function

Shell Programming and Scripting
1

At work we have 5 servers. I would like to write a script that would list all users on the servers (network). So I would not have to log into each servers and type in "who". This will allow me to earily use the "sendnote" function.

Any ideas?

2 
while read serverName
do
    ssh user@$serverName "who" > $serverName.txt
done < input.txt

put all server names in the input.txt file

3

Can you walk me through the script?

like what each word (command) does? Sorry very new to this

4 
while read serverName   --->   read the server names (which is present in the input.txt) 
do     ssh user@$serverName "who" > $serverName.txt  --> login to the server using the ssh command and redirect the output of who command to serverName.txt file 
done < input.txt          --> pass the input.txt
5

I receive an :

while - Expression syntax

When I try to run it. I created the ServerName.txt and place all the server names in there (1 per line) and the input.txt file (blank)

6

post your exact code

otherwise, i cant tell where it goes wrong

7

Ok I created 3 files:
1) inputer.txt (contains the 5 servers names)
2) ServerName.txt (contains nothing "Blank")
3) who.script

my who.script:

# !/bincsh -f
#
while read ServerNAme.txt
do
    ssh user@$ServerName "who" > $ServerName.txt
done < inputer.txt
8 
#!/bin/sh

while read ServerName
do
ssh user@$ServerName "who" > $ServerName.txt
done < inputer.txt

---------- Post updated at 09:27 PM ---------- Previous update was at 09:23 PM ----------

replace the user with your login name

ssh user@$ServerName

9

nice its starting to work:

New Error: ssh: connection to host alpha port 22: Connection refused

The way we normally log on is: rlogin alpha

---------- Post updated at 10:59 AM ---------- Previous update was at 09:00 AM ----------

Any ideas?

10

David,

through rlogin, i dont know. But alternative is there "ssh"

google it "password less ssh"