Visit The New, Modern Unix Linux Community

Script for shutting down 48 computers

Thread Tools Search this Thread
Operating Systems Linux Fedora Script for shutting down 48 computers
# 1  
Script for shutting down 48 computers

Hi All, I am pretty new to unix type languages. At work we have a server room with about 50 windows computers in one system and 50 in a unix system. We sometimes have power outages and I don't like the power slam. I wrote a windows batch file using sysinternals help to shutdown the windows computers. I am trying to write one for the unix servers. I started by using vi editor. I remember a little from school. Anyhoo, I start from one of the computers (I use ACC36 because that is where my KVM is. all are names ACC###)ACC36 and
ssh ACC30

to get to ACC30. Then my next line is
init 0

this is the shutdown command.
My next command is to get back to ACC36 before the shutdown is
ssh ACC36

Well, that works, but when I repeat the commands in the script for the other ACC's, it never goes past the first return to ACC36. After I write and save it with :wq , I then
chmod 755 power-off

Then to execute I go

What am I doing wrong? Any help would be appreciated.
# 2  
while read COMP; do echo ssh $COMP init 0; done < complist

and supply the computer names in that list. I assumed e.g. ssh ACC36 will safely log you into that machine.
Remove the echo if you're happy with what you see.
# 3  
If you shut down the computer the script is executing on - e.g., ACC36 is first in the list, you've lost scripting process. No more shutdowns. Be sure to run the script on the LAST ACCxxx box in your list of computers.
# 4  
Depending on availability on your system, you might shutdown +5.
# 5  
I presume you are doing this as root. You allow root to ssh onto all your servers ?

Using rudiC example. Just add & on the end and/or </dev/null

while read COMP
     echo " Shutting down  "$COMP
     echo    ssh $COMP init 0  </dev/null  &  
 done < complist

If you are running remote ssh commands on a list of servers, you have to add
</dev/null at the end or it will exit after the first one.
With just </dev/null it will run the command on each server in foreground one after another.

You can also add & to the end and it will execute the command in background on each server and return at once.

Test the script with the echo first and then remove, when you want to use it.

Last edited by Scrutinizer; 04-17-2015 at 01:49 AM.. Reason: CODE tags

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

Test Your Knowledge in Computers #918
Difficulty: Medium
Unix time is a single signed number which increments every millisecond.
True or False?

9 More Discussions You Might Find Interesting

1. Solaris

11.2 not shutting down completely

I just installed this 11.2 ver and when I tell it to shutdown it takes for ever then just hangs with this just a little bit of that red line left to go, then it just sits there like forever until I get tired of looking at it then force a shutdown by holding my power button down until my laptop... (8 Replies)
Discussion started by: userx-bw
8 Replies

2. Shell Programming and Scripting

Can i see wich Computers are up in my network with a script

#!/bin/bash for ((n=0 ; n < 254 ; n+=1)) do ip=192.168.0.$n if ping -c 1 -w 1 $ip > /dev/null 2> /dev/null >> /etc/logping.txt; then echo "${ip} is up" # output up # sintax >> /etc/logping.txt log with .txt format else echo "${ip} is down" # output... (4 Replies)
Discussion started by: Roggy
4 Replies

3. AIX

Getting error while shutting down

Hi, I am getting the error "/etc/rc.shutdown failed. Shutdown aborting" while shutting down the os. Please suggest. (1 Reply)
Discussion started by: manoj.solaris
1 Replies

4. Solaris

I Need to edit message at shutting down

on solaris 8 i edited file rc0 in /sbin at last line ex. /sbin/sync; /sbin/sync; /sbin/sync # Unmount file systems. /usr, /var, /var/adm, /var/run are not unmounted by # umountall because they are mounted by rcS (for single user mode) rather than # mountall. If this is changed,... (1 Reply)
Discussion started by: infjustice
1 Replies

5. Shell Programming and Scripting

Shell script to Shutdown Computers on Cluster

Hello all. I have built a cluster of 9 Macs for computational chemistry and I need a shell script that I can use from one computer to all the rest to shutdown. I have modified all of the Macs so that there is pass-wordless ssh. As well, I have modified each "visudo" file on each machine by... (1 Reply)
Discussion started by: marcozd
1 Replies

6. Ubuntu

Ubuntu Hangs when shutting down

i really dont know any other way to put it besides that Ubuntu 8.04, that i just installed on my computer hangs when it shuts down. the bar depletes the orange like it should, but it never actually shuts down. anyone know whats going on? (3 Replies)
Discussion started by: Texasone
3 Replies

7. UNIX for Dummies Questions & Answers

Shutting down the Server

Hi Is there anyway i can find out from which terminal a shutdown command has been run from ? :( (3 Replies)
Discussion started by: ktech
3 Replies

8. UNIX for Advanced & Expert Users

Shutting down Solaris

Hi I have a mix of solaris 8,9 & 10. I need to have our 6 Solaris servers shutdown buy a script that will be executed by APC network Shutdown software Im really not sure how I would write a script to shut them down and the following processes? the processes are portmapper seq seq_api... (1 Reply)
Discussion started by: tonysequoia
1 Replies

9. Shell Programming and Scripting

Script to get IP addresses of LAN computers

I need a shell script for OS X, one that can find IP addresses of machines connected to my LAN, get the names of the computer associated with those addresses, then display them like so in a list: "Bob's L33T Boxx: #.#.#.#" Something like the network scanner in Apple Remote Desktop is what I'm... (1 Reply)
Discussion started by: sladuuch
1 Replies

Featured Tech Videos