Do some command for each address in the 'node' file

foreach.sh

#! /bin/bash

includes=()
excludes=()

notMember () { for e in "${@:2}"; do [[ "$e" == "$1" ]] && return 1; done; return 0; }

while getopts ":e:i:" opt; do
  case $opt in
    e)
      excludes[${#excludes[@]}]=$OPTARG
      ;;
    i)
      if notMember $OPTARG ${includes[@]}; then
        includes[${#includes[@]}]=$OPTARG
      fi
      ;;
    \?)
      echo "Invalid option: -$OPTARG" >&2
      exit 1
      ;;
    :)
      echo "Option -$OPTARG requires an argument." >&2
      exit e
      ;;
  esac
done

shift $((OPTIND-1))
#echo ${excludes[@]}
#echo $@

if [ -z "${includes[*]}" ]; then
  nodes=$(cat nodes)
else
  nodes=${includes[*]}
fi

for n in $nodes; do
  if notMember $n ${excludes[@]}; then
    cmd="ssh 192.168.2.$n '$@'"
    echo ==== $cmd ====
    exec "$cmd"
  fi
done