检查主机是否存活的shell脚本

 1 #!/bin/bash
 2 PREFIX=192.168.116
 3  num=1
 4  while [ "$num" -lt "255" ]; do
 5  echo -en "Pinging ${PREFIX}.${num}..."
 6  ping -c1 -w1 -t5 ${PREFIX}.${num} >/dev/null 2>&1
 7  if [ "$?" -eq "0" ]; then
 8  echo "OK" && echo “${PREFIX}.${num}” >>ok.txt
 9  else
10  echo "Failed" && echo “${PREFIX}.${num}” >>failed.txt
11  fi
12  let num=$num+1
13  done
14