Run a command with a timeout. This is useful for things like 'df' which can hang if NFS is misbehaving

timeout.sh

#!/bin/bash

timeout=$1
shift
cmd=$1
shift
args=$@

if [[ -z "$cmd"  ]]; then
  echo "timeout.sh <seconds> <cmd>"
  exit 1
fi
if [[ -z "$timeout" ]]; then
  echo "timeout.sh <seconds> <cmd>"
  exit 1
fi

count=0
stdbuf -oL -eL $cmd $args > $cmd.out &
PID=$!
while kill -0 $PID && [ $count -lt $timeout ]
do
    sleep 1
    count=$(expr $count + 1)
done

kill -9 $PID >/dev/null 2>&1
cat ${cmd}.out