Shell Programming and Scripting

for server in $content_manager
        do
        ssh cognos@"$server"m 'ls && exit'
        done
        if (($? > 0))
        then
       echo "Content Manager server is Down"
       exit
        fi

cnt=0;
while [ $cnt -eq 0 ]
do
    for server in $content_manager
    do
        ping "$server"m || cnt=$(( $cnt + 1 ))   # I assume "$server"m resolves to a valid host name.....
   done
   if [ $cnt -eq 0 ] ; then        
       echo "Content Manager server is Down"
       exit
    fi
    sleep 1  # do not busy wait.
    cnt=0   # start counting over again
done

#endless loop
while :
do
  alive=0
  dead=0
  for server in $content_manager
  do
    uptime=`ssh -qnx cognos@"$server"m 'uptime' 2>/dev/null`
    if [ $? -eq 0 ]
    then
      alive=$(( $alive + 1 ))
      echo "$server : $uptime"
    else
      dead=$(( $dead + 1 ))
    fi
    sleep 1 # give the OS time to release sockets
  done
  if [ $alive -eq 0 ]
  then
    echo "Content Manager server is Down"
    exit
  fi
  if [ $dead -gt 0 ]
  then
    echo "Content Manager server is degraded"
  fi
done