Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

Running a script on multiple remote hosts at once

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Running a script on multiple remote hosts at once
# 1  
Old 07-18-2012
Running a script on multiple remote hosts at once
I have a script on about 15 hosts that I need to run for each host whenever I want (not crontab). Problem is, this script takes 5-10 mins to run for each host. Is there a way I can run the script in parallel for all the hosts instead of 1 at a time? Also, I'm remotely running the script on the hosts from my home host, using remsh.
# 2  
Old 07-18-2012
Apologies if this is an ignorant response, but can you not just kick them off in the background (Assuming you use a key exchange or a hosts file)?

Code:
for i in $(cat hosts.txt); do ssh user@${i} '/usr/local/scripts/test.sh' &; done

If you can't do the above, you should be able to just use expect to loop through them, assuming you need to login. You can spawn multiple rsh sessions and perform operations in parallel like that.
This User Gave Thanks to Vryali For This Post:
mrskittles99
# 3  
Old 07-18-2012
Useless Use of Cat

Code:
while read LINE
do
        command &
done < inputfile

wait

# 4  
Old 07-18-2012
Quote:
Originally Posted by Vryali
Apologies if this is an ignorant response, but can you not just kick them off in the background (Assuming you use a key exchange or a hosts file)?

Code:
for i in $(cat hosts.txt); do ssh user@${i} '/usr/local/scripts/test.sh' &; done

If you can't do the above, you should be able to just use expect to loop through them, assuming you need to login. You can spawn multiple rsh sessions and perform operations in parallel like that.
thanks
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

awk remote multiple hosts print remote hostname and output

Hi all, i'm trying to gether multiple pattern on remote hosts, and trying to print hostname and the pattern, ssh remoteserver1 -C 'hostname 2>&1;cat /var/log/server1.log | awk -F ";" '"'"'{ print " "$2" "$5}'"'"'| sort | uniq -c | sort -g -r ' The output is the following, remoteserver1 ... (8 Replies)
Discussion started by: charli1
8 Replies

2. Shell Programming and Scripting

Grep remote multiple hosts output to local server

Hello all, i'm trying to create a report by greping a pattern on multiple remote hosts and creta a simple report, actually i did this, is ther any better way to do this. #!/bin/bash for host in `cat RemoteHosts` do ssh $host -C 'hostname 2>&1; grep ERROR /var/log/WebServer.log.2019-09-21... (0 Replies)
Discussion started by: charli1
0 Replies

3. Solaris

How to copy a tar file on a series of remote hosts and untar it on those hosts?

Am trying to copy a tar file onto a series of remote hosts and untar it at the destination. Need to do this without having to do multiple ssh. Actions to perform within a single ssh session via shell script - copy a file - untar at destination (remote host) OS : Linux RHEL6 (3 Replies)
Discussion started by: sankasu
3 Replies

4. Shell Programming and Scripting

Ssh to validate multiple remote hosts connection validation.

Dear Folks, I am trying to read a config file contains ip and port numbers. i want to read each line of the config file and check ssh connection is happening or not. Kindly guide. Config file: abc@1.2.342 22 abc@1.2.343 22 abc@1.2.344 22 abc@1.2.345 22... (9 Replies)
Discussion started by: sadique.manzar
9 Replies

5. Shell Programming and Scripting

Ssh to multiple hosts and then run multiple for loops under remote session

Hello, I am trying to login to multiple servers and i have to run multiple loops to gather some details..Could you please help me out. I am specifically facing issues while running for loops. I have to run multiple for loops in else condition. but the below code is giving errors in for... (2 Replies)
Discussion started by: mohit_vardhani
2 Replies

6. Shell Programming and Scripting

Remote login and running a script on multiple servers

Hi all, I am baffled on this. Solaris Irix system.:confused: I have 4 servers all connected to one another, :b: I need to write a script line that would login on to server 1-3 ($HOST) start a script in the back ground and log off while the back ground script runs over a length of time.:eek: ... (10 Replies)
Discussion started by: weddy
10 Replies

7. Shell Programming and Scripting

Copy a file from local host to a list of remote hosts --- perl script

Hi friends, i need to prepare a script ( in perl) i have a file called "demo.exe" in my local unix host. i have a list of remote hosts in a file "hosts.txt" now i need to push "demo.exe" file to all the hosts in "hosts.txt" file. for this i need to prepare a script(in perl, but shell... (5 Replies)
Discussion started by: siva kumar
5 Replies

8. Shell Programming and Scripting

script to reboot multiple hosts

Hi Expert, How to create a script to reboot multiple hosts in linux? Thank you. (5 Replies)
Discussion started by: regmaster
5 Replies

9. UNIX for Dummies Questions & Answers

Running the same remote script on multiple servers

Experts, Im trying to remote into a server, run a script that resides on that server and capture the information displayed & store in a local file. I struggled with this yesterday & finally that script is working now. Now, here is a scope creep and the script that I wrote for 1 remote... (2 Replies)
Discussion started by: OMLEELA
2 Replies

10. Shell Programming and Scripting

script for df output from multiple hosts

I am trying get "df -k" output from multiple hosts along with their hostnames via ssh, my script is appending the "df -k" output from all the nodes to a single file but not getting the hostnames for those nodes, just wondering how to pass more than one command via ssh or may be someone could come... (6 Replies)
Discussion started by: barkath
6 Replies
Login or Register to Ask a Question