#!/bin/sh
checkPort()
{
telnet $2 $3 <checkPort.log 2>/dev/null
^]
close
!
ss=`cat checkPort.log | grep "Escape character is"`
if [ "A$ss" = "A" ]
then
echo "$2 port $3 checking result at `date` is not available">>checkingResult.log
#printf "$1 telnet $2 . $3 port "
#printf '\033[7m'
#printf "not available\n"
#printf '\033[m'
return 1
else
echo "$2 port $3 checking result at `date` is  available">>checkingResult.log
#printf "$1 telnet $2 . $3 port "
#printf "available\n"
return 0
fi
}
checkPort 10.253.32.25 10.253.35.14 10000



Linux一个简单的每秒执行命令shell脚本

如果需要该脚本每秒执行一次命令，通过linux自带的cron却不能实现，新版的cron据说可以精确到秒。

修改shell脚本：


#!/bin/bash

checkPort()
{
telnet $2 $3 <checkPort.log 2>/dev/null
^]
close
!
ss=`cat checkPort.log | grep "Escape character is"`
if [ "A$ss" = "A" ]
then
echo "$2 port $3 checking result at `date` is not available">>checkingResult.log
#printf "$1 telnet $2 . $3 port "
#printf '\033[7m'
#printf "not available\n"
#printf '\033[m'
return 1
else
echo "$2 port $3 checking result at `date` is  available">>checkingResult.log
#printf "$1 telnet $2 . $3 port "
#printf "available\n"
return 0
fi
}

while [ true ]; do
/bin/sleep 1
checkPort 10.253.32.25 10.253.35.14 10000

done


放入后台运行即可