ssh-runonall.sh

#!/bin/bash

servers=()
unset input
read -p "Server ${#servers[@]}: " input
while [ ${#servers[@]} -eq 0 ] || [[ "x${input}" != "x" ]]; do
  if [[ "x${input}" != "x" ]]; then
    servers=("${servers[@]}" $input)
  fi
  unset input
  read -p "Server ${#servers[@]}: " input
done

read -p 'Username: ' user
read -s -p 'Password: ' password
echo
read -p 'Command: ' cmd

for server in ${servers[@]}; do
  echo "**** Running '${cmd}' on '${server}' as '${user}'..."
  sshpass -p"${password}" ssh "${user}"@"${server}" "${cmd}"
done