Shell Programming and Scripting

tp=1
while [ $tp -le 2]

do

  echo 

  command=`ls -l |grep abcd`

  if [ "$command" == "123" ]

  then

  echo "ok"

  break

  else
  let tp++
  sleep 30
  echo "nook"

  fi

done

#!/bin/bash
x=0
while : 
do

n=0
while [ $n -le 5 ];do 

if [ $n -eq  3 ]; then
    echo "Going to Break internal while loop but will check again" $x
    break
fi

n=$((n+1))

done
x=$((x+1))
done

tp=1
while [ $tp -le 2]
do
   ...stuff...
done

if [ "$command" != "123" ]
then
   echo "a warning message"
fi