put pubkeys on a lot of hosts

 i need to zap authorized_keys *all over the place*  
 this concatenates a file which contains sever id_rsa.pub keys.  
   
 nodes is a long list of ip addresses.  
   
 #!/bin/bash  
   
 for i in `cat nodes` ; do  
    cat authorized_keys.add | ssh -o ConnectTimeout=5 -o StrictHostKeyChecking=no -o \  
    UserKnownHostsFile=/dev/null -t -t -t -l root $i 'cat >> /root/.ssh/authorized_keys'  
 done