How can I automate running commands remotely over SSH to multiple servers in parallel?

Question

I\'ve searched around a bit for similar questions, but other than running one command or perhaps a few command with items such as:

ssh user@host -t sudo su -         


        

Answer 1

You can run a local script as shown by che and Yang, and/or you can use a Here document:

ssh root@server /bin/sh <<\EOF  
wget http://server/warfile    # Could use NFS here  
cp app.war /location  
command 1  
command 2  
/etc/init.d/httpd restart  
EOF